We provide haloalkanes and haloarenes practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on haloalkanes and haloarenes skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.
List of haloalkanes and haloarenes Questions
| Question No | Questions | Class |
|---|---|---|
| 1 | .54 Classify the following compounds as primary, secondary and tertiary halides. (a) 1-bromobut-2-ene (b) 4-bromopent-2-ene (c) 2-bromo-2-methylpropane |
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| 2 | 2.51 Which of the products will be major product in the reaction given belo Explain CH3CH=CH2 + HI • CHỊCH CHẠI+ CHỊ CHICH (A) (B) |
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| 3 | 1. Find out the number of dimerize products obtained by following reaction. H2C-CI+H3C-CH2-C1+ HC-CH2 – CH2 – C1 Dryether → Na |
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| 4 | Choose the correct answer among the alternatives given : In the following pairs of halogen compounds, which compound undergoes faster ( boldsymbol{S}_{N} 1 ) reaction? ( (mathrm{i}) ) ( A ) (i) (ii) B. (i) (ii) ( c ) (i) (ii) ( D ) (i) (ii) |
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| 5 | The rate of ( E_{1} ) reaction depends upon: A. the concentration of substrate B. the concentration of nucleophile C. the concentration of substrate as well as nucleophile D. neither the concentration of substrate nor of nucleophile |
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| 6 | Assertion MeMgBr should be prepared under perfectly anhydrous conditions. Reason Grignard reagent reacts with water A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason are correct |
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| 7 | Write the equation of reaction of chlrobenzene : Halogenation |
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| 8 | ассорсо. () au (2) du Elecope / ” 014. Classify the following reactions in one of the reaction type studied in this unit. (a) CH CH Br + HS– CH,CH,SH + Br (b) (CH)C=CH, + HCI (CH),CCI-CH, (c) CH.CH,Br + HO CH=CH, +H,O + Br” (d) (CH),C-CH,OH + HBr (CH),C Br CH,CH,CH, + H,O |
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| 9 | 192. An organic compound decolourises bromine in CCI, and can be reduced catalytically. Also, it gives a precipitate with ammoniacal cuprous chloride. The compound can be (a) CH2 – CH=CH-CH2 (b) CHỊCH,C=CH (c) CH-CH=CH, (d) CH2C=CH2 CH3 |
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| 10 | 0 0 meso: ( A ) B. ( c ) All of these |
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| 11 | 2. Which of the following reaction is correct? CHI +(CH3)2Culi → CH,CH +CH,Cu + Lil CH Br(CH-CH2) Culi CH3CH2 – CH2 CH2-CH3 + CHỊCH, Cu + LiBr CH=CH; O () CH, Çuěch, Chuculs Br CH3-CH-C-CH3 + CH3Cu + LiBr CH, |
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| 12 | Which of the following has the ( (S) ) configuration? ( A ) B. ( c ) ( D ) |
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| 13 | The fastest reaction with aqueous acetone solution is given by: A. ( C H_{3}-C H_{2}-C l ) в. ( C H_{3}-O-C H_{2}-C l ) c. ( O=C H-C H_{2}-C l ) D. ( C H_{2}=C H-C l ) |
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| 14 | The IUPAC name of the compound is: A. 1 -bromo-1chloro-4, ( 4^{prime} ) -bicyclobutane B. ( 4-left(4^{prime}-text { chlorocyclobutyl }right)-1 ) -bromocyclobutane c. 3 -Bromo-3′-chloro-1, 1′-bicyclobutane D. 4-(4′-bromocyclobutyl)-1-chlorocyclo butane |
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| 15 | Which is the correct assignment of chirality at ( C 1 ) and ( C 4 ) of the following molecule? A ( .1 S, 4 R ) в. ( 1 R, 4 R ) c. ( 1 R, 4 S ) D. ( 1 S, 4 S ) |
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| 16 | Haloalkane in the presence of alcoholic KOH undergoes: A. elimination B. polymerisation c. dimerisation D. substitution |
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| 17 | On exposure to sunlight, chloroform oxidises to: A. phosgene B. chloropicrin c. salicylaldehyde D. chloral |
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| 18 | Choose the correct order of nucleophilic substitution reaction: ( (mathrm{III}) ) ( A cdot(1)<(11)<(11) ) B. (II) <(I) <(III) ( c cdot(111)<(11)<(1) ) D. (1) <(III) <(II) |
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| 19 | IUPAC name of allyl chloride is: A. 1 -chloroethane B. 3-chloro-1-propyne c. 3-chloro-1-propene D. 1-chloropropene |
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| 20 | What is the hybridisation of carbon that is attached to chlorine atom in ( n- ) primary alkyl halide? ( A cdot s p^{3} ) B. ( s p^{2} ) ( c cdot s p ) D. ( s p^{3} d ) |
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| 21 | Under the influence of air and light, chloroform decomposes into: A. ( C C l_{4} ) в. ( left(C H_{3}right)_{2}^{O H} C-C C l_{3} ) c. ( operatorname{cocl}_{2} ) D. ( C C l_{3} C H O ) |
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| 22 | All halogenoalkanes contain a halogen atom – fluorine, chlorine, bromine or iodine – attached to a/an ( _{–}- ) group. A . alky B. aryl c. benzyl D. benzylic |
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| 23 | Q. 52 Why is the solubility of haloalkanes in water very low? ollcano in Netor onero |
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| 24 | How many chlorine atoms are present in Chloropicrin? A . 1 B. ( c cdot 3 ) ( D ) |
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| 25 | Explain the following reactions: (a) Carbylamine reaction (b) Sandmeyer reaction |
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| 26 | Determine the relationship between the two molecules shown A. identical molecules B. diastereomers c. enantiomers D. constitutional iso |
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| 27 | Which one of the following is a secondary alkylhalide? A ( cdotleft(C H_{3}right)_{3} C C l ) B ( cdot C_{2} H_{5} C l ) c. ( left(C H_{3}right)_{2} C H C l ) D. ( left(C H_{3}right)_{2} C H C H_{2} C l ) |
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| 28 | 12. In which of the following reactions Hoffman elimination product is the major product? CHZ Conc. H2SO4 (a) CH3 – C- CH – CH, samo na zovem СН, ОН CH; Potassium t-butoxide (b) CH, C- CH – CH, CH3 Br CH3CH; 1. AgOH (C) CH3-CH2-CH2-CH, -N CH; 2. A → CH3 (d) CH3-C-CH2-ci ac. Kot CH3 |
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| 29 | The above transformation proceeds through: A. electrophilic-addition B. benzyne intermediate C . activated nucleophilic substitution D. elimination, addition mechanism |
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| 30 | Which of the following factors does not favour ( boldsymbol{S}_{N} mathbf{1} ) mechanism? A. Strong nucleophile B. Polar solvent c. Low conc. of nucleophile D. ( 3^{0} ) halide |
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| 31 | topp | 12 |
| 32 | The treatment of ( boldsymbol{C H}_{3} boldsymbol{M} boldsymbol{g} boldsymbol{X} ) with ( boldsymbol{C H}_{3} boldsymbol{C} equiv boldsymbol{C}-boldsymbol{H} ) produces: A. ( C H_{3} M g X=C-C H_{3} ) в. ( C H_{3} C H=C H C H_{3} ) c. ( C H_{4} ) D. ( left(C H_{3}right)_{2} C=C H_{2} ) |
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| 33 | Which among the given haloalkanes develop colour when exposed to light? A. ( R-B r ) and ( R-C l ) B. ( R-I ) and ( R-F ) c. ( R-C l ) and ( R-B r ) D. ( R-B r ) and ( R-I ) |
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| 34 | Which of the following cannot undergo ( E_{2} ) reaction? ( mathbf{A} ) ( B ) ( c ) D. None of these |
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| 35 | The compound ( boldsymbol{X} ) is: A. o-methylchlorobenzene B. p-methylchlorobenzene c. m-methylchlorobenzene D. both ( A & B ) |
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| 36 | 0.29 IL CHES – CH₂ (b) (ii) < (i) < (iii) do CH₃ (c) (i) < (ii) < 0) (a) (i) < (ii) < (mm) (d) (i) < (iii) < (ii) |
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| 37 | Which of the following are polyhalogen compounds? A. Dichloromethane B. Chloroform c. Tetrachloromethane D. All of the above |
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| 38 | dentify the major product in the following reaction. |
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| 39 | Which of the following has highest dipole moment? A. ( C H_{3} C l ) в. ( C H_{3} F ) c. ( C H_{3} B r ) D. ( C H_{3} l ) |
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| 40 | Cyclohexane on chlorination gives: A. chloro cyclohexane B. 1,2 – dichloro cyclohexane C. 1,4 – dichloro cyclohexane D. a mixture of all the above |
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| 41 | ( C l_{3} C H O rightarrow stackrel{H_{2} O}{rightarrow} ) Find the final product |
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| 42 | Which of the following statement is wrong about chloroform? A. Chloroform is used as an anesthetic. B. Chloroform has distorted tetrahedral shape. c. Chloroform is used as a solvent. D. Chloroform has ( s p^{2} ) hybridized carbon atom. |
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| 43 | The number of optical isomers of ( boldsymbol{C H}_{3} boldsymbol{C H}(boldsymbol{O H}) boldsymbol{C H O} ) is: ( mathbf{A} cdot mathbf{0} ) B . 2 ( c .3 ) D. |
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| 44 | Assertion A small amount of alchohol is added to chloroform bottles Reason Alcohol acts as inhibitor for oxidation of choloroform.Also it reacts with ( C O C l_{2} ) to give harmless diethyl carbonate A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 45 | Which of the following undergoes nucleophilic substitution exclusively by ( boldsymbol{S} boldsymbol{N}^{1} ) mechanism: A. ethyl chloride B. isopropyl chloride c. benzyl chloride D. chlorobenzene |
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| 46 | Discuss the mechanism of alkaline hydrolysis of bromomethane. |
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| 47 | Stability order of following carbocation A. ( i>i i> ) ii ( i>i v ) в. ( i v> ) ii ( i>i> ) il ( i ) ( mathbf{c} . i v>i>i i i>i i ) D. ( i i i>i v>i i>i ) |
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| 48 | What is the end product of the above shown reaction? ( A ) B. ( c ) D. |
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| 49 | Q. 74 tert-Butylbromide reacts with aq. NaOH by Sn1 mechanism while n-butylbromide reacts by SN 1 mechanism. Why? |
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| 50 | The order of reactivities of methyl halides in the formation of Grignard reagent is : A. ( C H_{3} I>C H_{3} B r>C H_{3} C l ) в. ( C H_{3} C l>C H_{3} B r>C H_{3} I ) c. ( C H_{3} B r>C H_{3} C l>C H_{3} I ) D. ( C H_{3} B r>C H_{3} I>C H_{3} C l ) |
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| 51 | Which of the following statement is incorrect about nucleophiles? a) Nucleophiles have an unshared electron pair and can make use of this to react with an electron deficient species b) The nucleophilicity of an element (an electron donor) generally increases on going down a group in the periodic table c) A nucleophile is electron-deficient species d) All good nucleophiles are good bases when we deal across the period |
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| 52 | Why does p-dichlorobenzene have a higher m.p than its o- and m- isomers? |
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| 53 | The compounds given below are: and A. enantiomers B. ifrntical C. regiomers D. diastereomers |
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| 54 | Which of the following method of preparation of chloroform is not preferable? A. Distillation of ethyl alcohol with bleaching powder B. Chlorination of methane c. Reduction of carbon tetrachloride with iron and water D. Distillation of chloral hydrate with ( N a O H ) |
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| 55 | topp ( E ) ( Q ) туре уочт чuestion 4 (1) B. (2) ( c ) (3) ( D ) (4) |
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| 56 | Correct boiling point is: ( begin{array}{cc}boldsymbol{C H}_{3} boldsymbol{C H}_{2}-boldsymbol{I} & boldsymbol{C H}_{3} boldsymbol{C H}_{2}-boldsymbol{B r}end{array} ) ( begin{array}{cc}boldsymbol{C H}_{3} boldsymbol{C H}_{2}-boldsymbol{C l} & boldsymbol{C H}_{3} boldsymbol{C H}_{2}-boldsymbol{F}end{array} ) A. ( I V>I I I>I I>I ) В. ( I I>I I I>I V>I ) c. ( I>I I>I I I>I V ) D. ( I V>I I I>I>I I ) |
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| 57 | Q. 25 What will be the product obtained as a result of the talente Q. 25 What will be the product obtained as a result of the following reaction and why? AICI + CH3-CH2-CH2CI |
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| 58 | Alkyl halides develop colour on: A. addition of water B. addition of non polar solvent c. exposure to light D. exposure to air |
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| 59 | Choose the correct answer among the alternatives given : 2-Chloro-2methylpropane on reaction with alc. ( K O H ) gives ( X ) as the product ( x ) is ( ? ) A. but-2-ene B. 2-methylbut-1-ene c. 2-methylprop-1-ene D. 2-methylbutan-2-01 |
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| 60 | Identify ‘Z’ in the following reaction ( operatorname{series}, C H_{3} C H_{2} C H_{2} B r stackrel{N a O H}{longrightarrow} ) ( (boldsymbol{X}) frac{A l_{2} O_{3}}{Delta}(boldsymbol{Y}) stackrel{boldsymbol{H O C l}}{longrightarrow}(boldsymbol{Z}) ) ( A ) Mixture of в. ( c ) D. |
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| 61 | ( frac{sqrt{0}}{0} ) 0 0 0 |
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| 62 | 243. The compound that is most reactive towards electrophilic nitration is : no (a) Toluene (b) Benzene (c) Benzoic acid (d) Nitrobenzene |
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| 63 | Which of the following compounds will ( operatorname{give} S_{N} 1 ) and ( S_{N} 2 ) reactions with considerable rate? ।. ( boldsymbol{C}_{boldsymbol{6}} boldsymbol{H}_{boldsymbol{5}}-boldsymbol{C} boldsymbol{H}_{boldsymbol{2}}-boldsymbol{B} boldsymbol{r} ) II. ( boldsymbol{C H}_{2}=boldsymbol{C H}-boldsymbol{C H}_{2}-boldsymbol{B r} ) III. ( boldsymbol{C H}_{3}-boldsymbol{C H}(boldsymbol{B r}) boldsymbol{C H}_{3} ) Select the correct answer from the codes below below. A. ( I, ) II and II в. ( I, ) II and ( I V ) c. ( I I, ) III and ( I V ) D. I, III and IV |
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| 64 | The monohalogen derivatives of alkanes are called: A. alkene halide B. haloalkanes c. halogen alky D. none of the above |
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| 65 | In which of the following compound three chlorine atoms are present? A. Phosgene B. Dichloromethane c. DDT D. chlroform |
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| 66 | Which has a higher melting point between ( 1,3- ) dichlorobenzene and 1, 4-dichlorobenzene? A. 1,3 -dichlorobenzene B. 1,4-dichlorobenzene c. Both have same melting point D. None of these |
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| 67 | Explain the following named reactions: (i) Sandmeyer reaction (ii) Gattermann reaction |
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| 68 | In which of the following reactions, the product obtained is chiral? A. ( C H_{3} C O C H_{3} stackrel{N a B H_{4}}{longrightarrow} ) B. ( C H_{3} ) COCl Rosenmund’s reduction c. ( C H_{3} C H_{2} C O_{2} C H_{2} C H_{3} stackrel{S n, H C l}{longrightarrow} ) D. ( C H_{3} C H_{2} C O C H_{3} stackrel{L i A H H_{4}}{longrightarrow} ) |
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| 69 | Chloroform reacts with NaOH to form sodium formate. This is a/an: A. oxidation reaction B. hydrolysis reaction c. reduction reaction D. addition reaction |
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| 70 | The total number of monohalogenated products formed by halogenation of 2,4,4 -trimethylhexane are: A . 5 B. 7 ( c cdot 6 ) D. 8 ( E ) |
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| 71 | Ethylidene chloride is a/an A. vicinal dihalide B. gem-dihalide c. allylic halide D. vinylic halide |
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| 72 | toppr Q Type your question rhis question has multiple correct options ( A ) B. ( c ) ( D ) |
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| 73 | In which of the following cases ( C-C ) bond length will be the longest? A. ( C H_{3}-C F_{3} ) В. ( F C H_{2}-C H_{2} F ) ( mathbf{c} cdot F_{2} C H-C H F_{2} ) D. ( C F_{3}-C F_{3} ) |
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| 74 | Nature of ( C-X ) bond is: A. ionic B. covalent c. co-ordinate D. none of these |
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| 75 | 0. 36 An alkane C3H18 is obtained as the only product on subjecting a primary alkyl halide to Wurtz reaction. On monobromination this alkane vields a single isomer of a tertiary bromide. Write the structure of alkane and the tertiary bromide. of an olla halide avec an alkane with double the number of carbon |
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| 76 | Predict the product of the reaction between benzene diazonium chloride and cuprous bromide. A. Phenol B. chlorobenzene c. bromobenzene D. dichlorobenzene |
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| 77 | Which of the following compounds will given racemic mixture on nucleophilic substitution by ( O H^{ominus} ) ion? (a) ( boldsymbol{C H}_{3}-boldsymbol{C H}-boldsymbol{B r} ) ( boldsymbol{C}_{2} boldsymbol{H}_{5} ) ( boldsymbol{1} ) ( boldsymbol{B} ) (b) ( boldsymbol{C H}_{3}-underset{C_{2} boldsymbol{H}_{5}}{boldsymbol{C}}-boldsymbol{C H}_{3} ) (c) ( boldsymbol{C H}_{3}-underset{boldsymbol{C}_{2} boldsymbol{H}_{5}}{boldsymbol{C} boldsymbol{H}}-boldsymbol{C} boldsymbol{H}_{2} boldsymbol{B} boldsymbol{r} ) в. ( (a),(b),(c) ) c. ( (b),(c) ) (n) D. ( (a),(c) ) |
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| 78 | For the given pair of ( S_{N} 2 ) reaction, the first product occurs with larger rate constant. вि OH кон. |
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| 79 | Give method of preparation, properties and uses of Freon |
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| 80 | Choose the correct order of nucleophilic substitution reaction: ( A cdot(111)<(11)<(1) ) B. (II) < (III) < (I) ( c cdot(1)<(111)<(11) ) D. (I) <(II) <(III) |
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| 81 | On commercial scale, phenol is obtained from chlorobenzene. The chlorobenzene needed for the purpose is prepared by: ( A ) ( bigcirc]+mathrm{cl}_{2} frac{mathrm{Anhy} cdot mathrm{AlCl}_{3}}{310-320 mathrm{K}} ) B. ( c ) ( bigcirc]+mathrm{H} mathrm{c} mathrm{t}+mathrm{o}_{2(mathrm{air})} frac{mathrm{cuc}_{2}}{500 mathrm{K}}>widehat{bigcirc} ) |
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| 82 | The yield of chlorobenzene obtained by reaction of phenols with ( P C l_{5} ) is less, due to the formation of : A. o-chlorophenol B. p-chlorophenol c. phosphorus oxychloride D. triphenyl phosphate |
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| 83 | Which of the following is a geminal dihalide? A. Ethylene dibromide B. Propylidene chloride c. Isopropyl bromide D. None of the above |
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| 84 | Which one of the following has highest boiling point? A. ( H_{3} C C H_{2} C H_{2} C H_{2} C l ) в. ( left(H_{3} Cright)_{2} C H C H_{2} C l ) c. ( left(H_{3} Cright)_{3} C C l ) D. ( H_{3} C C H_{2} C H(C l) C H_{3} ) |
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| 85 | What is the product of the following reaction? |
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| 86 | ( widehat{O}^{m}= ) 0 0 0 ( widehat{Q} ) |
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| 87 | With respect to chlorobenzene, which of the following statements is not correct? A. ( C l ) is ortho-para directing B. ( C l ) exhibits ( +M ) effect c. ( C l ) is ring deactivating D. ( C l ) is meta directing |
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| 88 | Chlorobenzene is prepared commercially by A. Raschig process B. Wurtz Fitting reaction c. Friedel-craft’s reaction D. Grignard reaction |
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| 89 | Which alkyl-halide has maximum density? ( mathbf{A} cdot C_{3} H_{7} I ) в. ( C_{2} H_{5} I ) ( mathbf{c} cdot C H_{3} I ) D. ( C H_{3} B r ) |
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| 90 | Write the structures of the following compounds. (i) ( 2- ) chloro, ( 3- ) methyl pentane (ii) ( p- ) bromo chloro benzene |
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| 91 | Given Reaction. Y in reaction is: ( leftlanglemathrm{Br} frac{text { ether }}{mathrm{Mg}}>mathrm{x} frac{(mathrm{i}) mathrm{H}_{2} mathrm{O}}{(mathrm{ii}) mathrm{HCl}}>mathrm{Y}(text { main product })right. ) ( A . ) Hexane B. Cyclohexane C . Cyclohexylcyclohexane D. Cyclohexylether |
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| 92 | Which of the following compounds will have the highest melting point? A. Chlorobenzene B. o-Dichlorobenzene c. m-Dichlorobenzene D. p-Dichlorobenzene |
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| 93 | IUPAC name of the compound is: ( boldsymbol{C H}_{3}-underbrace{C}_{C H_{3}}^{C H_{3}}-B r ) |
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| 94 | Which of the following have highest boiling point? A. ( C H_{3} C l ) в. ( C H_{3} C H_{2} C H_{2} C l ) ( mathbf{c} cdot C H_{3} C H_{2} C H_{2} B r ) D. ( C H_{3} C H_{2} C H_{2} I ) |
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| 95 | The secondary alkyl halide is called as secondary because: A. the functional group attached to primary carbon atom B. the functional group attached to secondary carbon atom C. the functional group attached to tertiary carbon atom D. the functional group is attached to secondary noncarbon atom |
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| 96 | Q.67 How do polar solvents help in the first step in SN mechanism: | 12 |
| 97 | Explain the mechanism of alkaline hydrolysis of t-butyl bromide with energy profile diagram. | 12 |
| 98 | ( boldsymbol{C H}_{3}-underset{boldsymbol{O} boldsymbol{H}}{boldsymbol{C}}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}- ) ( B ) ( dot{C}-C H_{3} ) ( I ) ( B r ) The IUPAC name of the above given compound is: A. 6,6 -Dibromoheptan- – -ol B. 2,2-dibromoheptan-6-ol c. 6,6 -dibromo- – hydroxyheptane D. 2,2-dibromo-6-hydroxyheptane |
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| 99 | The chloride that cannot get hydrolysed is : A. ( operatorname{SiCl}_{4} ) в. ( operatorname{Sn} C l_{4} ) c. ( P b C l_{4} ) D. ( C C l_{4} ) |
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| 100 | Aryl halides are less reactive in nucleophilic substitution reactions. (i) Write any two reasons for less reactivity. (ii) Give one example for nucleophilic substitution reactions of aryl halides. |
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| 101 | Which one of the following will show optical isomerism? ( begin{array}{cc}text { в. } & H \ & mid \ & C H_{3}- & C \ & mid \ & O Hend{array}-C O_{2} H ) c. ( quad C H_{3} ) ( left.right|_{C H_{3}-} ^{mid}_{C}-C O_{2} H ) ( _{H} ) D. ( quad C H_{3} ) ( begin{array}{ccc}c_{H_{3}-} & _{C} & _{-C O_{2} H} \ & mid & \ & C l & end{array} ) |
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| 102 | The IUPAC name of ( left(C H_{3}right)_{2} C H C H_{2} B r ) is : A. 1-Bromo-2-methyl propane B. 2-bromo-2-methyl propane c. 1-bromo-1-methyl propane D. 2-bromo-1-methyl propane |
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| 103 | The chemical formula of 2 -chloro pentane is: A ( cdot C_{5} H_{5} C l ) B. ( C_{5} H_{11} C l ) ( mathbf{c} cdot C_{4} H_{9} C l_{2} ) D. ( C_{5} H_{9} C l ) |
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| 104 | Write the structures and IUPAC names of possible isomers of ( C_{5} H_{11} B r ) and classify them as ( 1^{0} / 2^{0} / 3^{0} ) |
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| 105 | The products formed when chloral hydrate is dissolved in ( N a O H ) solution and then distilled? A ( cdot C H_{2} C l_{2} ) and ( N a C l ) в. ( C H_{3} C l ) and ( C H_{3} C O O N a ) c. ( C H C l_{3}, H C O O N a ) and ( H_{2} O ) D. ( C_{2} H_{5} C l ) and ( C H_{3} C O O N a ) |
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| 106 | Arrange the following compounds in increasing order of their boiling points. (a) (b) ( mathrm{CH}_{3} mathrm{CH}_{2} mathrm{CH}_{2} mathrm{CH}_{2} mathrm{Br} ) ( (c) ) ( mathbf{A} cdot(b)<(a)<(c) ) B. ( (a)<(b)<(c) ) C ( .(c)<(a)<(b) ) D. ( (c)<(b)<(a) ) |
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| 107 | When an alkyl halide reacts with an alkoxide, the product is? A. Ether B. Ester c. Hydrocarbon D. Alcohol |
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| 108 | Ethyl bromide and isopropyl chloride can be distinguished by: A. alcoholic ( A g N O_{3} ) B. comparing their colours c. burning the compounds on spatula D. aqueous KOH solution |
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| 109 | Explain Wurtz-Fitting reaction. | 12 |
| 110 | IUPAC name of DDT is: A. ( 1,1^{prime}-(2,2,2-text { Trichloroethane- } 1,1-text { diyl }) ) bis ( (4- ) chlorobenzene) B. p, p-dichloro diphenyl trichloro ethene C. ( p, p ) -dichloro diphenyl trichloro benzene D. p, p-tetra chloro ethane |
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| 111 | Which of the following alkyl bromides will eliminate ( H B r ) fastest? A. Ethyl bromide B. Propyl bromide c. Isopropyl bromide D. t-Butyl bromide |
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| 112 | Which of the following device is used to measure the optical activity? A. Manometer B. Barometer c. Polarimeter D. Hygrometer |
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| 113 | The compound ( C_{6} H_{12} ) shows optical isomerism. Draw the structural formula of the compound and name it. |
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| 114 | What is the formula of Chloral? A ( . C H C l_{3} ) в. ( C C l_{3} ) СОСН( _{3} ) c ( cdot C C l_{3} C H O ) D. ( operatorname{cocl}_{2} ) |
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| 115 | In the preparation of ( boldsymbol{C H} boldsymbol{C l}_{3} ) from ethanol and moist bleaching powder, the latter provides: A ( cdot C H_{3} C H O ) в. ( H C l ) ( mathbf{c} cdot ) Both ( C H_{3} C H O ) and ( H C l ) D. Calcium formate |
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| 116 | Ortho and para hydrogen differ in A. atomic number B. mass number c. electron spin in two atoms D. nuclear spin of two atoms |
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| 117 | . 40 Which of the following are secondary bromides? (a) (CH3),CHBO (b) (CH3)3 C CH Br (c) CH2CH(Br)CH2CH3 (d) (CH3)2CBrCH2CH3 |
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| 118 | ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{I} ) is an: A. iodine derivative of alkanes B. derivative of iodo alkanes c. both ( A ) and ( B ) D. None of these |
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| 119 | 42. When light is shined on a mixture of chlorine and ethane, chloroethane is formed besides dichloroethane, trichloroethane and several other products. What reaction condition can optimize the yield of chloroethane? (a) Higher reaction temperature (b) High concentration of chlorine gas (c) Excess of ethane reactant (d) Low reaction temperature |
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| 120 | Q. 63 Why can aryl halides not be prepared by reaction of phenol with HCl in the presence of ZnCl2? til double |
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| 121 | 93. An optically active alkyl bromide X (CH, Br) upon treatment with ethanolic KOH solution forms two alkenes Y and Z with their molecular formula (CH2). Y and Z are positional isomers. Z upon treatment with cold, dilute alkaline KMnO, solution gives a meso-diol. Hence, X is (a) 2-bromohexane (b) 1-bromo-2, 3-dimethyl butane (C) 3-bromohexane (d) 2-bromo-2, 3-dimethyl butane |
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| 122 | The reactivity of 2 -bromo- 2 methylbutane ( (I), 1 ) -bromopentane ( (I I) ) and ( 2- ) bromopentane ( (I I I) ) towards ( boldsymbol{S}_{N} 2 ) displacement is such that: A ( I>I I>I I I ) ( I ) В. ( I>I I I>I I ) c. ( I I>I I I>I ) D. ( I I>I>I I I ) |
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| 123 | If ‘n’ represents total number of asymmetric carbon atoms in a compound, the possible number of optical isomers of the compound is : A ( .2 n ) B . ( n^{2} ) ( c cdot 2^{n} ) D. ( 2 n+2 ) |
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| 124 | Which of the following compound may be optical active? A ( cdot C o(e n)_{2} C I_{2} ) В・ ( left[R h C I B r N H_{3} P H_{3}right] ) ( mathbf{c} cdot C u(e n)_{2} C I_{2} ) D. All of these |
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| 125 | Aryl halides are extremely less reactive towards nucleophilic substitution reactions. Give any two reasons. | 12 |
| 126 | ( = ) ( d x^{prime}-1 ) ( d x ) ( d ) ( d ) |
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| 127 | Chloroform belong to which of the following type of alkyl halide? A. Primary alkyl halide B. Secondary alkyl halide c. Tertiary alkyl halide D. Tetra alkyl halide |
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| 128 | Write general formula of Grignard reagent. |
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| 129 | (R)-2 -lodobutane is treated with Nal in acetone and allowed to stand for a long time.The product eventually formed is: A ( cdot(R)-2- ) iodobutane B . ( (S)-2- ) iodobutane C. ( (pm)-2- ) iodobutane D. (土) – 1,2 – diiodobutane |
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| 130 | toppr ( t ) Q Type your question. 3 ( c ) ( D ) |
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| 131 | The first steps of ( S N^{1} ) and ( S N^{2} ) reactions are, respectively: A. Both exothermic B. Both endothermic c. Endothermic and exothermic D. Exothermic and endothermic |
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| 132 | Which of the following is not formed by Sandmeyer reaction? A. ( C_{6} H_{5} I ) B . ( C_{6} H_{5} C l ) ( mathbf{c} cdot C_{6} H_{5} B r ) D. ( C_{6} H_{5} C N ) |
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| 133 | Formula of Freon-112 is: A ( cdot C_{2} F_{2} C l_{4} ) в. ( C F_{2} C l_{2} ) c. ( C F C l_{3} ) D. ( C C l_{3} F ) |
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| 134 | The position of ( B r ) in the compound in ( boldsymbol{C H}_{3} boldsymbol{C H}=boldsymbol{C H C}(boldsymbol{B r})left(boldsymbol{C H}_{3}right)_{2} ) can be classified as: A . ally! B. ary! c. viny! D. secondary |
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| 135 | Predict the order of reactivity of the following compounds in ( S_{N} 1 ) and ( S_{N} 2 ) reactions: The four isomeric bromobutanes ( boldsymbol{C}_{6} boldsymbol{H}_{5} boldsymbol{C H}_{2} boldsymbol{B r}, boldsymbol{C}_{6} boldsymbol{H}_{5} boldsymbol{C H}left(boldsymbol{C}_{6} boldsymbol{H}_{5}right) boldsymbol{B r}, boldsymbol{C}_{6} ) |
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| 136 | 247. The major product of the given reaction is: H₃C Hoot men Major product HN >> Major product H2SO4 NO, H₂CL H. CH (a) -NO₂ NORTON |
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| 137 | Assertion Alkyl halides are colourless when pure. Reason Bromides and lodides develop colour when exposed to light. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 138 | Which of the following undergoes nucleophilic substitution exclusively by ( boldsymbol{S}_{N} 1 ) mechanism? A. Ethyl chloride B. Isopropyl chloride c. Benzyl chloride D. Chloro benzene |
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| 139 | The order of reactivity of alkyl halides is as follows: A. ( R C l<R B r<R I ) в. ( R IR C l ) c. ( R B r>R I>R C l ) D. ( R I>R C l>R B r ) |
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| 140 | Assertion lodination of alkanes is carried out under reflux conditions in the presence of reducing agent. Because Reason lodination of alkanes take place explosively. A. Both Assertion and Reason are correct and the Reason is the correct explanation of the Assertion B. Both Assertion and Reason are correct but the Reason is not the correct explanation of the Assertion c. The Assertion is correct but the Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 141 | Which of the following cyclopentane derivative is optically inactive? ( A ) B. ( c ) ( D ) |
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| 142 | 0.9 In which of the following molecules carbon atom marked with asterisk is asymmetric? | 0 c c (1) ch c Br Br (a) (i), (ii), (iii) and (iv) (c) (ii), (iii) and (iv) (i) OH ở CH 4 H -CH3 – C₂H5 C₂H5 (b) (i), (ii) and (iii) (d) (i), (iii) and (iv) of its four voloncies with four |
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| 143 | Assertion: Alkyl halides are polar in nature, but they are almost insoluble in water Reason: They can neither form Hydrogen bond nor they can break hydrogen bond between water molecules. |
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| 144 | Which one of the following has the lowest boiling point? A ( . C H_{3} C l ) B ( cdot C_{2} H_{5} C l ) c. ( C_{2} H_{5} B r ) D. ( C_{2} H_{5} I ) |
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| 145 | Which of the following compounds can exist as an meso compounds? A. 1,2 -dichlorobutane B. 2, 3-dichloropentane c. 2,3 -dichlorobutane D. 1,2 -dichloropentane |
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| 146 | 0.37 Haloalkanes contain halogen atom(s) attached to the sp carbon atom of an alkyl group. Identify haloa an alkyl group. Identify haloalkane from the following compounds. (a) 2-bromopentane (b) Vinyl chloride (chloroethene) (c) 2-chloroacetophenone (d) Trichloromethane |
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| 147 | 48 Discuss the role of Lewis acids in the preparation of aryl bromides and chlorides in the dark. |
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| 148 | Q Type your question- alternatives given: Chlorobenzene can be converted into phenol by heating in aqueous sodium hydroxide solution at a temperature of ( 623 mathrm{K} ) and a pressure of 300 atm. However, the rate of reaction can be increased by the presence of certain groups in the benzene ring. What will be the order of reactivity of following compounds towards the above |
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| 149 | Ethyl chloride on reduction with ( L i A l H_{4} ) gives compound ( x ) as important product. ( x ) on chlorination with one mole of ( C l_{2} ) in the presence of light at ordinary temperature gives ( y ). What is ( y ) ( ? ) A. ( C H_{3} C l ) в. ( C H_{2} C l_{2} ) ( mathbf{c} cdot C_{2} H_{5} C l ) ( mathrm{D} cdot C_{2} H_{4} C l_{2} ) |
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| 150 | What will be the number of stereo isomers of a compound contain only two asymmetric carbon atoms? A .2 B. 3 ( c cdot 4 ) D. 5 |
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| 151 | ( 2^{x}-2^{x} ) ( frac{d}{x} ) |
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| 152 | Which of the following compounds has the highest melting point?? A. o-dibromobenzene B. m-dibromobenzene c. p-dibromobenzene D. bromobenzene |
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| 153 | below has two 21. Each of the compounds shown below ha aromatic ring, labelled as A and B. Identify number number of compounds in which ring B is more active than rin for electrophilic aromatic substitution reaction. ip.40L O ON 01 |
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| 154 | ( p ) ( dot{g} ) ( dot{q} ) ( dot{q} ) |
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| 155 | Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due to: A. formation of a less stable carbonium ion in aryl halides B. resonance stabilisation in aryl halide C. presence o fdouble bonds in alkyl halides D. inductive effect in aryl halides |
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| 156 | Choose the correct answer among the alternatives given : Classify the following compounds as primary, secondary and tertiary halides. (i) 1-Bromobut-2-ene (ii) ( 4- ) Bromopent.2-ene (iii) 2-Bromo-2-methylpropane A. (i)-secondary, (ii)-tertiary, (iii)-primary B. (i)-secondary, (ii)-primary, (iii)-tertiary c. (i)-primary, (ii)-tertiary, (iii)-secondary D. (i)-primary, (ii)-secondary, (iii)-tertiary |
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| 157 | Give Reason: Racemic mixture is optically inactive. |
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| 158 | War gas is: A. chloretone B. ethyl carbonate C. chloropicrin D. methylene chloride |
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| 159 | Which of the following compounds undergo nucleophilic substitution reactions? A. Isopropyl chloride B. Ethyl bromide c. Benzyl chloride D. vinyl chloride |
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| 160 | A student was carrying out a Grignard reaction between ( P h M g B r ) and ethyl benzoate. She ran out of anhydrous ether just after the Grignard reagent was made. Which of the following solvents can still used to dissolve the ethyl benzoate for its reaction with already formed ( boldsymbol{P h} M boldsymbol{g} boldsymbol{B r} ) A. acetone B. ethyl acetate c. absolute alcohol D. benzene |
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| 161 | Among the following the compounds which can undergo an ( S_{N} 1 ) reaction in an aqueous solution, are: A. I and IV only B. II and IV only c. Il and III only D. II, III and IV only |
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| 162 | A dextrorotatory compound: A. must have a dextrorotatory enantiomer B. may have a dextrorotatory enantiomer C. must have a laevorotatory enantiomer D. may have a laevorotatory enantiomer |
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| 163 | Q. 71 Elimination reactions (especially B – elimination) are as common as the nucleophilic substitution reaction in case of alkyl halides. Specify the reagents used in both cases. |
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| 164 | correct increasing order of boiling points of the following compounds? 1-10dobutane, 1-bromobutane, 1-chlorobutane, Butane (a) Butane < 1-chlorobutane < 1-bromobutane < 1-iodobutane (b) I-lodobutane < 1-bromobutane < 1-chlorobutane < Butane y butane <1-iodobutane < 1-bromobutane < 1-chlorobutane (d) Butane < 1-chlorobutane < 1-iodobutane < 1-bromobutane |
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| 165 | The final product of the given reaction is, ( boldsymbol{P h}-boldsymbol{N}_{2} boldsymbol{C l} frac{boldsymbol{C u}_{2} boldsymbol{C l}_{2}}{boldsymbol{P} boldsymbol{h}-boldsymbol{C l}+boldsymbol{N}_{2} uparrow} ) A ( cdot P h-N_{2} C l stackrel{C u_{2} C l_{2}}{longrightarrow} P h-C l+N_{2} uparrow ) B . ( P h-N_{2} C l stackrel{C u_{2} C l_{2}}{longrightarrow} P h-C l+N_{3} uparrow ) c. ( P h-N_{2} C l stackrel{C u_{2} C l_{2}}{longrightarrow} P h-C l_{2}+N_{2} uparrow ) D. ( P h-N_{2} C l frac{C u_{2} C l_{2}}{longrightarrow} P h_{2}-C l+N_{2} uparrow ) |
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| 166 | 3 8 8 3 |
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| 167 | Which of the following distinguishes bleaching powder from carbonyl chloride? A. Number of chlorine atoms B. Number of oxygen atoms c. Calcium atom. D. Hydrogen atom. |
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| 168 | A suspension of ( C a O C l_{2} ) in water is heated with ethanol. The product formed is: A. ethylene B. ethanol c. trichloromethane D. chloroethane |
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| 169 | Action of bleaching powder on ethyl alcohol gives? A. Chloroform B. Dichlore methane c. Trichloro ethenb D. Ethylene chloride |
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| 170 | Slow oxidation of chloroform in air leads to the formation of: A. formyl chloride B. formic acid c. ( operatorname{cocl}_{2} ) D. trichloro acetic acid |
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| 171 | NELI Q.5 Which of the following is halogen exchange (a) RX + Nal RI + Nax (b) C=C + HX C -C in exchange reaction? HX (c) R-OH + HX – ZnCl2R-X + H2O – CH₂ CH₃. CH ronation in which one halide replaces and |
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| 172 | In an Aprotic solvent, which relative ordering best describes the nucleophilicity of the halide ions? A. lodide> Bromide> Chloride>> Flouride B. lodide> Bromide> Chloride> Flouride c. lodide< Bromides Chlorides Flouride D. lodide Chloride> Flouride |
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| 173 | Which of the following oxo-acid is possible? This question has multiple correct options A. ( H O C l O_{2} ) в. НОF Оа ( mathrm{c} cdot mathrm{HOBrO}_{2} ) D. НОПО( _{2} ) |
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| 174 | For the following compounds, the correct statement(s) with respect to nucleophilic substitution reactions is ( (operatorname{are}) ) This question has multiple correct options ( mathbf{A} cdot ) I and III follow ( S_{N} 1 ) mechanism B. Compound IV undergoes inversion of configuration C. I and II follow ( S_{N} 2 ) mechanism D. The order of reactivity for I, III and IV is: ( I V>I>I I I ) |
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| 175 | 171. To prepare but-2-yne from 2, 2, 3, 3-tetrachlorobutar reagent used is: (a) Zinc dust / A (b) Sodamide (c) Alc. KOH (d) aq. KOH |
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| 176 | Which of the following statements is correct about halogens? A. they are all capable of exhibiting more than one oxidation states B. they are all diatomic and form diatomic ions C. they are all diatomic and form univalent ions D. they are all reducing agents |
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| 177 | 49. In which of the following pairs, the bromination of first member is easier than the second member? (a) Isobutane, n-butane (b) n-Butane, isobutane (C) Methane, ethane (d) None of these |
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| 178 | Give product of the following reaction. | 12 |
| 179 | Assign configuration to the following? A. ( E ) в. ( E, E ) ( c . E, z ) D. ( Z, Z ) |
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| 180 | Among the choices of an alkyl bromide, the least reactive bromide in ( S_{N} 2 ) reaction is: A. 1-bromopentane B. 2-bromo-2-methylbutane c. 1-bromo-3-methylbutane D. 1-bromo-2-methylbutane |
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| 181 | How will you prepare chlorobenzene from benzene diazonium chloride? | 12 |
| 182 | Question 5. A hydrocarbon C H.does not react with chlorine in dark but gives a single monochloro compound C5H,Cl in bright sunlight, Identify the hydrocarbon. Enlist the possibilities of structures for molecular formula C Hao. Which isomer reacts in dark, which in sunlight. Then give the reactions. |
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| 183 | Question 7. Write the equations for the preparation of 1-iodobutane from (i) 1-butanol (ii) 1-chlorobutane (iii) but-1-ene Reagents (1) HI will replace —OH by –I. (ii) Nal will replace –Cl by-I. (iii) HBr will add to form bromoderivative, then-Br will be replaced by – by using Kl in methanol. |
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| 184 | Which of the following alkyl halide is most reactive towards substitution on reaction by ( S_{N} 1 ) mechanism? ( mathbf{A} cdotleft(C H_{3}right)_{3} C-B r ) B ( cdotleft(C H_{3}right)_{2}-C H-B r ) c. ( C H_{3}-B r ) D. ( C H_{3}-C H_{2}-B r ) |
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| 185 | What are ( X ) and ( Y ) in the following reaction? ( boldsymbol{C F}_{2} boldsymbol{C l}_{2} stackrel{boldsymbol{u v}}{longrightarrow} boldsymbol{X}+boldsymbol{Y} ) ( mathbf{A} cdot dot{C} l C F_{2}, dot{C l} ) в. ( C_{2} F_{4}, C l_{2} ) c. ( C dot{F} C l_{2}, dot{F} ) ( mathbf{D} cdot: C C l_{2}, F_{2} ) |
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| 186 | Which of the following reactions is most exothermic? | 12 |
| 187 | Assign structures to ( A, B, C ) and ( D ) in the following: ( mathbf{A} cdot C H_{2} C H_{2} C H_{2} C H_{2}+a l c cdot K O H rightarrow A ) ( B r ) B cdot ( left(C H_{3}right)_{3} C B r+C H_{3} C O O^{-} rightarrow B ) c. ( left(C H_{3}right)_{2} C H underset{O_{H}}{C H} C H_{3}+H_{2} S O_{4} triangleq C ) ( D ) |
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| 188 | When glycerol is reacted with ( P X_{3} ) one of the byproduct is ( X_{2} . ) The ( P X_{3} ) must be: A. ( P I_{3} ) в. ( P B r_{3} ) c. ( P C l_{3} ) D. ( P F_{3} ) |
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| 189 | ( boldsymbol{C H}_{3}-boldsymbol{C H}(boldsymbol{B r})-boldsymbol{C H}_{3} stackrel{text {alc. } boldsymbol{K O H}}{longrightarrow} ) ( boldsymbol{A} frac{boldsymbol{H} boldsymbol{B} boldsymbol{r}}{text {peroxide}} boldsymbol{B} frac{boldsymbol{N a I}}{text {acetone}} boldsymbol{C} ) The compound ( C ) is : ( mathbf{A} cdot C H_{3}-C H_{2}-C H_{2}-I ) B. ( C H_{3}-C H(I)-C H_{3} ) c. ( C H_{3}-C H I-C H_{2}-I ) D. ( C H_{3}-C H=C H-I ) |
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| 190 | Statement 1: Paradichlorobenzene has higher melting point and solubility than that of ortho and meta forms. Statement 2: Para isomer has symmetrical structure and can easily pack closely in crystal structure. A. Both Statement 1 and Statement 2 are correct and Statement 2 is correct explanation for Statement 1 B. Both Statement 1 and Statement 2 are correct and Statement 2 is not correct explanation for Statement c. statement 1 is correct and statement 2 is wrong D. Statement 1 is wrong and statement 2 is correct. |
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| 191 | benzene Q. 92 Assertion (A) It is difficult to replace chlorine by -OH inch in comparsion to that in chloroethane. Reason (R) chlorine carbon (C-Cl) bond in chlorobenzene has a partial double bond character due to resonance bonation |
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| 192 | The order of decreasing ( boldsymbol{S}_{N} mathbf{1} ) reactivities of the halides: ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C l} quad boldsymbol{C H}_{2}= ) ( boldsymbol{C H} boldsymbol{C H} boldsymbol{C l C H}_{3} ) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H C l C} ) ( boldsymbol{I} ) ( boldsymbol{I} ) A. ( I>I I>I I I ) в. ( I I>I>I I I ) c. ( I I>I I I>I ) D. ( I I I>I I>I ) |
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| 193 | What are the IUPAC rules for naming alkyl halides? |
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| 194 | How do you convert the following: (i) Prop-1-ene to 1-fluoropropane (ii) Chlorobenzene to 2-chlorotoluene (iii) Ethanol to propanenitrile Write the main products when (i) n-butyl chloride is treated with alcoholic ( K O H ) (ii) ( 2,4,6- ) trinitrochlorobenzene is subjected to hydrolysis (iii) methyl chloride is treated with ( boldsymbol{A} boldsymbol{g} boldsymbol{N} ) |
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| 195 | Question 5. Draw the structures of major monohalo products in each of the following reactions : OH + SOCI CH2CH3 Brz, heat or UV light N- CH OH + HCI Heat (1) HO CH3 (iv) [ +HI (v) CH3CH2Br + Nal → Heat + Br2 UV light |
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| 196 | 21. Which is least reactive alkyl halide in Wurtz coupling reaction? (a) (b) NO2 (c)+ (d) CH, CH, C1 |
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| 197 | Compounds derived from the alkanes from the replacement of one or more than one hydrogen atoms from halogen atoms are called as: A. alkyl halide B. haloalkanes c. halo arenes D. both ( A ) and ( B ) |
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| 198 | On heating with bleaching powder, ethyl alcohol is converted into: A. ( C H_{3} ) СООН в. ( C H_{3} C H O ) c. ( C H_{3} C O C H_{3} ) D. ( C H C l_{3} ) |
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| 199 | In racemic mixtures ( D ) -forms do not exist. A. True B. False |
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| 200 | Primary alkyl halide ( C_{4} H_{9} B r ) ( (a) ) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with ( H B r ) to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), ( C_{8} H_{18} ) which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions. |
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| 201 | Which of the following sequences would yield m-nitro chlorobenzene ( (Z) ) from benzene? A. Benzene ( frac{C l_{2} / F e C l_{3}}{longrightarrow}(X) frac{H N O_{3}}{H_{2} S O_{4}}(Z) ) B. Benzene ( frac{H_{2} S O_{4} / H N O_{3}}{longrightarrow}(Z) ) c. Benzene ( frac{H_{2} S O_{4} / H N O_{3}}{rightarrow}(X) frac{C_{l 2} / F e C l_{3}}{longrightarrow}(Z) ) D. All of these |
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| 202 | 1, 2 – dichloro ethane is which type of halide? A. Geminal halide B. Vicinal halide c. Alkylidene halide D. Allylic halide |
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| 203 | o 13 +R-C-01 Anhy. R + HC1 271. O The electrophile involved in this Friedel-Crafts reaction is resonance stabilized, which of the following is true? (a) The canonical form having positive charge on car- bon is main contributor. (b) The canonical form having positive charge on oxy- gen is main contributor (c) Both contributes equally (d) None of these |
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| 204 | Naether 1. CH3CH2 – C1_Nakether Which of the following products may not be formed? (a) CH2 – CH, (b) CH, – CH – CH, – CH, (c) CH = CH, (d) CH. |
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| 205 | Which of the following will react fastest with ( boldsymbol{A} boldsymbol{g}^{*} ) ( A ) в. ( c ) ( D ) |
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| 206 | Magnitude of specific rotation of a compound is independent of: A. solvent B. concentration c. length of tube D. temperature |
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| 207 | Write the equation of reaction of chlrobenzene: Nitration |
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| 208 | Chloroform gives salicylaldehyde on treatment with phenol in the presence of a base. This reaction is called as: A. Wurtz reaction B. Reimer – Tiemann reaction C. Friedel – Craft’s reaction D. Cannizaro’s reaction |
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| 209 | Fluorobenzene ( C_{6} H_{5} F ) can be synthesized in the laboratory: A. by heating phenol with ( H F ) and ( K F ) B. from aniline by diazotization followed by heating the diazonium salt with ( H B F_{4} ) C. by direct fluorination of benzene with ( F_{2} ) gas D. by reacting bromobenzene with ( N a F ) solution |
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| 210 | Which of the following statements about benzyl chloride is incorrect? A. It is less reactive than alkyl halides B. It can be oxidised to benzaldehyde by boiling with copper nitrate solution c. It is a lachrymatory liquid and answers Beilstein’s test D. It gives a white precipitate with alcoholic silver nitrate |
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| 211 | 152. HBr (1 mole) >>Major product: Br Br (b) (d) None of these Br |
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| 212 | In isomeric alkyl halides: A. the branch chain isomer have relatively high boiling point as compared to its straight chain isomer B. the branch chain isomer have relatively low boiling point as compared to its straight chain isomer C. the branch chain isomer boiling point equal to its straight chain isomer D. none of these |
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| 213 | Which statements is/are correct? i. ( quad ) Me ( overbrace{(mathbf{A})}^{wedge} C l frac{N a N O_{2}}{E t O H} ) ii. ( mathbf{M e} widehat{mathbf{O}}^{mathbf{N}} mathbf{C l} frac{mathbf{N a N O}_{mathbf{2}}}{mathbf{E} mathbf{t} mathbf{O} mathbf{H}} ) ( (mathrm{C}) ) A. Both reactions ( ( i ) ) and (ii) proceed via ( S_{N} 2 ) mechanism B. Both reactions (i) and (ii) proceed via ( S_{N} 1 ) mechanism C. Reactions ( ( i ) ) proceeds via ( S_{N} 1 ) and reaction (ii) proceed via ( S_{N} 2 ) mechanism D. Reactions ( ( i ) ) proceeds via ( S_{N} 2 ) and reaction (ii) proceed via ( S_{N} 1 ) mechanism |
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| 214 | When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed? a) 2 moles of ethane b) 1 moles of ethane c) 2 moles of butane d) 1 moles of butane |
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| 215 | Which of the following is gemdihalide? A ( cdot C H_{3}-C H(B r)-C H_{2} B r ) В. ( C H_{3}-C H B r_{2} ) C. ( C H_{3}-C H(B r)-C H_{2}-C H_{2} B r ) D. ( B r C H_{2} C H_{2} B r ) |
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| 216 | Consider following three halides: (।) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C l} ) (II) ( boldsymbol{C H}_{2}=boldsymbol{C H}-boldsymbol{C l} ) ( (| I) quad C_{6} H_{5} C l ) Arrange ( C-C l ) bond length of these compounds in decreasing order A ( . I>I I>I I I ) в. ( I>I I I>I I ) c. ( I I I>I I>I ) D. ( I I>I I I>I ) |
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| 217 | 208 NCERT Exemplar (Class XII) Solutions Directions (Q. Nos. 26-29) In the questions 26 to 29 a mncreasing order of rate of reaction towards nucleophilic suOS the questions 26 to 29 arrange the compounds in Q. 26 CI CI Q NO2 NO -NO₂ (ii) (d) (iii) < (a) () < (i) < (iii) (b) (iii) <(i < ) (c ) < i 0 < (1) TL |
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| 218 | 25 Which of the following commer llowing compounds will give racemic mixture on nucleophilic substitution by OH ion? Br (1) CH3 -CH- Br (ii) CH3-C-CH3 C₂H, C₂H₂ (iii) CH3 -CH-CH,Br C₂H, (a) (0) (b) (i), (ii) and (ii) (c) (ii) and (iii) (d) (i) and (iii) |
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| 219 | Phenyl magnesium bromide reacting with t-Butyl alcohol gives: A. ( P h-O H ) в. ( P h-H ) ( c ) ( D ) |
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| 220 | Freons are: A. chlorofluorocarbons of methane B. chlorofluorocarbons of ethane C. both chlorofluorocarbons of methane and chlorofluorocarbons of ethane D. chlorofluorocarbons of butane |
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| 221 | In the replacement reaction: The reaction will be most favourable if M happens to be: [ frac{lambda}{nearrow} mathrm{CI}+mathrm{MF} rightarrow frac{searrow}{/} mathrm{CF}+mathrm{MI} ] ( A cdot K ) B. Rb ( c cdot L ) D. Na a |
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| 222 | Q. 34 Which of the following statements are correct about the reaction intermediate? (a) Intermediate (iii) is unstable because in this carbon is attached to 5 atoms (b) Intermediate (iii) is unstable because carbon atom is sp hybridised (C) Intermediate (iii) is stable because carbon atom is sp-hybridised (d) Intermediate (iii) is less stable than the reactant (ii) |
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| 223 | Out of (ref. image), which one is optically active and why? and |
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| 224 | How many optical isomer will the tartaric acid show? A . 3 B. 4 c. 0 ( D ) |
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| 225 | ( sigma ) ( delta ) ( dot{theta} ) ( delta ) |
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| 226 | ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{O H} frac{text {SOCI}_{2} boldsymbol{P}_{boldsymbol{y} boldsymbol{r i d i n e}}}{boldsymbol{}} ) Ethanol What will be the major organic product of the reaction? |
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| 227 | Consider the following anions. When attached to ( s p^{3-} ) hybridized carbon, their leaving group ability in nucleophilic substitution reactions decreases in the order. (II) A. ( I>I I>I I I>I V ) В. ( I>I I>I V>I I I ) c. ( quad I V>I>I I>I I I ) D. ( I V>I I I>I I>I ) |
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| 228 | The correct reactivity order of alcohols towards ( boldsymbol{H}-boldsymbol{X} ) will be: (I) ( boldsymbol{C H}_{2}=boldsymbol{C H}-boldsymbol{O H} ) (II) ( boldsymbol{C H}_{2}=boldsymbol{C H}-boldsymbol{C H}_{2} boldsymbol{O H} ) (III) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{O H} ) ( (mid V) C H_{3}-C H-C H_{3} ) a ( ^{1} ) A ( , I I>I>I I I>I V ) ( V ) B. ( I V>I I I>I I>I ) c. ( I I>I V>I>I I I ) D. ( I I>I V>I I I>I ) |
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| 229 | Rank in the order of increasing acidic strength: A ( . A<B<C ) в. ( A<C<B ) c. ( B<A<C ) D. ( B<C<A ) |
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| 230 | Formula of Halothane is: A. ( C F_{2} C l_{2} ) в. ( C F_{2} C l ) c. ( C F_{3}-C H C l B r ) D. ( left(C_{2} F_{4}right) ) |
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| 231 | Question 12. Explain why (i) the dipole moment of chlorobenzene is lower than that cyclohexyl chloride? (ii) alkyl halides, though polar, are immiscible with water? (iii) Grignard reagents should be prepared under anhydrous conditions (D) Find the hybridization of C-atoms in chlorobenzene and cyclohex chloride and electronegativity to find the bond polarity and thus dipole moment (in Strong intermolecular H-bonding among water molecules. (iii) Consider reactive nature of Grignard reagents with water. |
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| 232 | Which of the given mentioned positions in the given compound is more reactive towards electrophilic substitutions? ( A ) B. ( c .5 ) D. |
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| 233 | The compound which does not lead to nitrile by substitution with ( N a C N / D M S O ) is: A. Benzyl chloride B. Ethyl chloride c. Isopropyl chloride D. Chlorobenzene E. Isobutyl chloride |
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| 234 | Write the IUPAC name of the following compound: ( boldsymbol{C H}_{2}=boldsymbol{C}left(boldsymbol{C H}_{3}right)-boldsymbol{C}(boldsymbol{H})left(boldsymbol{C H}_{3}right)(boldsymbol{B r}) ) A. 3-Bromo-2-methylbut-1-ene B. 2-Bromo-2-methylbut-1-ene c. 1 -Bromo-2-methylbut-1-ene D. none of these |
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| 235 | 197. The major product of the following reaction is CH-C=C—H+ Brz-H,_HBr → H Br Br H (a) CoHz-C-C-H (b) CH, C-Ć-Br troit Br Hoonhos Br Hibri H Br Br (c) CHz-C—C—Br (d) CH-C=C-Br тн Br D |
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| 236 | 157. Bez Product(s) obtained is/are: CCl4 o н СН, (a) Diastereomers (b) Racemic (c) Meso (d) Optically pure enantiomers |
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| 237 | is the replacement of diazonium group by ( -O H ) group using cuprous salts. The product is Haloarene. A. Sandmeyer’s reaction B. Michel reaction c. ozonolysis D. None of these |
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| 238 | 221. Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO, and conc. HSO4. In the nitrating mixture HNO, acts as a (a) base (b) acid (c) reducing agent (d) catalyst |
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| 239 | Which of the following are the products in the following reaction? A . 2-chloro toluene B. 3-chloro toluene c. 4 -chloro toluene D. Both A and |
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| 240 | Primary, Secondary and Tertiary alkyl halides belongs to : A. monohalogen derivative B. dihalogen derivative c. trihalogen derivative D. tetrahalogen derivative |
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| 241 | Question 1. Aryl chlorides and bromides can be easily prepared to electrophilic substitution of arenes with chloride and bromide respectivel in the presence of Lewis acid catalysts. But why does preparation of a iodides requires presence of an oxidising agent? |
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| 242 | The major product obtained in the following reaction is: A ( cdot C_{6} H_{5} C H=C H C_{6} H_{5} ) ( mathbf{B} cdot(+) C_{6} H_{5} C Hleft(O^{t} B uright) C H_{2} C_{6} H_{5} ) ( mathbf{c} cdot(-) C_{6} H_{5} C Hleft(O^{t} B uright) C H_{2} C_{6} H_{5} ) ( mathbf{D} cdot(pm) C_{6} H_{5} C Hleft(O^{t} B uright) C H_{2} C_{6} H_{5} ) |
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| 243 | 9. Which of the following cannot be formed as single major product by Wurtz’s coupling reaction of an alkyl halide? |
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| 244 | Replacement of chlorine from chlorobenzene to give phenol requires drastic conditions but chlorine of ( 2,4- ) dinitrochlorobenzene is readily replaced because: A. ( N O_{2} ) makes the electron rich ring at ortho and parapositions B. ( N O_{2} ) withdraws electrons at meta position c. ( N O_{2} ) donates electrons at meta position D. ( N O_{2} ) withdraws electrons from ortho- and para position |
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| 245 | Which of the following reactions is not correctly matched? A ( cdot 2 C_{2} H_{5} B r+2 N a stackrel{text {dry ether}}{longrightarrow} C_{4} H_{1} 0+2 N a B r ) Wurtz reaction B . ( C H_{3} B r+A g F stackrel{C}{longrightarrow} H_{3} F+A g B r ) Etards reaction ( mathbf{c} cdot C_{5} H_{6} B r+2 N a+B r C_{2} H_{5} stackrel{text {dry ether}}{longrightarrow} C_{6} H_{5} C_{2} H_{5}+ ) ( N a B r ) Wurtz fitting reaction D ( cdot 2 C_{6} H_{5} B r+2 N a stackrel{text {dryether}}{longrightarrow} C_{6} H_{5} C_{6} H_{5}+2 N a B r ) Fitting reaction |
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| 246 | Which of the following is least reactive in a nucleophilic subtitution reaction? ( mathbf{A} cdotleft(C H_{3}right)_{3} C-C l ) в. ( C H_{2}=C H C l ) c. ( C H_{3} C H_{2} C l ) D. ( C H_{2}=C H C H_{2} C l ) |
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| 247 | When ( 1^{0} ) amine reacts with ( C H C l_{3} ) in ethanolic ( K O H, ) the product formed is: A. an isocyanide B. an aldehyde c. a cyanide D. an alcohol |
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| 248 | Which of the following are chiral (optically active)? A. Benzoic acid B. Pent-2,3-diene ( left(C H_{3}-C H=C=C H-C H_{3}right) ) c. Hex- 2,3,4 -triene ( left(C H_{3}-C H=C=C=C H-C H_{3}right) ) D. 1,1,3,3 – tetrachloroprop- 1,2 -diene ( left(C C I_{2}=C=C I_{2}right) ) E. 2-(2-Carboxy-6-Nitrobenzyl)-3-Nitrobenzoicacid |
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| 249 | 64. How many dichlorocyclohexane would be produced upon free radical chlorination of chlorocyclohexane? (a) 4 (b) 6 (c) 8 (d) 9 |
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| 250 | Which of the following statements are correct? A. A meso compound has chiral centres but exhibits no optical activity B. A racemic mixture is optically inactive because of two equal and opposite rotation of same isomers of the molecules in the mixture. C. A meso compound has molecules which are superimpossible on their mirror images even though they contain chiral centres D. a meso compound is optically inactive because the rotation caused by any molecule is cancelled by equal and opposite rotation caused by another molecules that is the mirror image of the first. |
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| 251 | The number of possible monobromo products is (excluding stereoisomers): ( A cdot 4 ) B. 5 ( c cdot 8 ) D. 10 |
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| 252 | Molecules whose mirror image is nonsuperimposable over them are known as chiral. Which of the following molecules is chiral in nature? A. 2 – Bromobutane B. 1 – Bromobutane c. 2 – Bromopropane D. 2 – Bromopropan-2-ol |
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| 253 | Which of the following statement is/are true? This question has multiple correct options ( mathbf{A} cdot C H_{2} C l-C H_{2} C l ) is a gem dihalide. B. Alkyl iodides develops colour when exposed to light. C. Halogenation of alkanes proceeds by addition mechanism. D. Swarts reaction is used to prepare alkyl fluorides. |
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| 254 | 12.20 The nation of eleme with torine in the presence of ren and in the 0. 20 The reaction of toluene with chlorine in the presence of iron and absence of light yields ………. сна CHCI (d) Modure of (b) and (c) (c) HOC Yosence of iron and carried out in |
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| 255 | Carbon tetrachloride is inflammable. A. True B. False |
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| 256 | Q. 63 Two liquids (A) and (B) can be separated by the method of fractional distillation. The boiling point of liquid (A) is less than boiling point of liquid (B). Which of the liquids do you expect to come out first in the distillate ? Explain. |
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| 257 | Elimination of bromine from ( 2- ) bromobutane results in the formation of: A. Equimolar mixture of 1 and ( 2- ) butane B. Predominantly – 2 – butene c. Predominantly ( -1- ) butene D. Predominantly2 – butyne |
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| 258 | Explain Halogenation reaction with conversion of ( boldsymbol{C H}_{4} ) to ( boldsymbol{C C l}_{4} ) in alkanes. |
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| 259 | Additional of ( B r_{2} ) to trans- 2 – butene would give a product which is : A . achiral B. racemic c. meso D. optically active |
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| 260 | What is the molecular formula of the product formed when benzene is treated with ethyl chloride in the presence of anhydrous aluminium chloride? A. ( C_{8} H_{10} ) в. ( C_{6} H_{6} ) c. ( C_{8} H_{12} ) D. ( C_{6} H_{14} ) |
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| 261 | lodoform can be prepared from: A. isoamyl alcoho B. ( alpha ) -phenyl ethanol c. isobutyl alcohol D. ( beta ) -phenyl ethanol |
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| 262 | The correct decreasing order of following alkyl halides according to the rate of ( beta ) – elimination reaction with alcoholic KOH will be: ( (mathrm{i}) C H_{3}-underset{C H_{3}}{C}^{H}-C H_{2} B r ) (ii) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{B r} ) (iii) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{B r} ) ( A cdot(text { i) }>(text { ii) }>(text { iii }) ) B. (iii) > (ii) > (i) c. (ii)> (iii) > (i) D. (i) > (iii) > (ii) |
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| 263 | Q. 83 Match the structures given in Column I wit ructures given in Column I with the names in Column II. Column Column II 1 4-bromopent-2-ene 2 4-bromo-3-methylpent-2-ene Br 3. 1-bromo-2-methylbut-2-ene — Br D. Br 4 1-bromo-2-methylpent-2-ene |
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| 264 | Predict product in the given reaction | 12 |
| 265 | In Reimer-Tiemann reaction, reactants are: A. phenol, ( C H C l_{3} ) and alkal B. phenol, ( C C l_{4} ) and alkali c. aniline, ( C H C l_{3} ) and alkal D. both Phenol, ( C H C l_{3} ) and alkali and phenol, ( C C l_{4} ) and alkal |
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| 266 | The IUPAC name of the following compound is ( 1,2,5- ) tribromo ( -3,4,6- ) trichlorobenzene A. True B. False |
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| 267 | 19. Which of the following reactions will give least substituted alkene? OH (a) W Conc. H,SO4 (b) BF Mezc-OK® AgOH Alc. KOH BI |
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| 268 | toppr ( E ) Q Type your question If and is from the given options. ( A ) ( B ) ( c ) D. |
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| 269 | The tertiary alkyl halide is called as tertiary because: A. the functional group attached primary carbon atom B. the functional group attached to secondary carbon atom C. the functional group attached to tertiary carbon atom D. none of these |
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| 270 | Alkyl halides are immiscible in water though they are polar because? A. they react with water to give alcohols B. they cannot form hydrogen bonds with water C. ( C-X ) bond cannot be broken easily D. they are stable compounds and are not reactive. |
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| 271 | (2R,4S)-2,4-Dichloropentane and ( (2 S, 4 R)-2,4 ) -dichloropentane are: A. diastereomers B. constitutional isomers c. enantiomer D. identical |
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| 272 | The structures ( A ) and ( B ) represent: (A) (B) A. Enantiomers B. Diastermers c. Homomers D. Racemic mixture |
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| 273 | ( C_{6} H_{5} N_{2} C l^{C u_{2} C l_{2} / H C l} ) this reaction is named as: A. Sandmeyer B. Swarts c. wurtz-Fittig D. Finkelstein |
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| 274 | ( boldsymbol{C}_{boldsymbol{6}} boldsymbol{H}_{boldsymbol{5}} boldsymbol{N}_{2} boldsymbol{C l} frac{boldsymbol{C u} C l}{boldsymbol{H C l}} boldsymbol{C}_{boldsymbol{6}} boldsymbol{H}_{boldsymbol{5}} boldsymbol{C l} ) Above reaction is : A. Gattermann’s reaction B. Sandmeyer’s reaction c. Wurtz’s reaction D. Frankland’s reaction |
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| 275 | In halogenation of aromatic hydrocarbon, a halogen carrier is used which is generally a Lewis acid. The main function of this reagent is to generate the species: ( mathbf{A} cdot X ) B. ( X ) ( c cdot x^{+} ) D. ( x^{text {. }} ) |
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| 276 | 0.9 Arrange the following alkyl halides in decreasing order of the rate of B – elimination reaction with alcoholic KOH. н B. CH3 – CH2 – Br A. CH3 -C- CH, Br ін, C. CH3 – CH2 – CH2 – Br (a) A >B>C (b)C>B>A (c)B>C>A (d) A >C>B |
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| 277 | Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due to: A. the formation of less stable carbonium ion B. resonance stabilisation c. larger carbon-halogen bond D. inductive effect |
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| 278 | Chloroform reacts with conc. ( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{3} ) to give ( X . ) This ( X ) is used as This question has multiple correct options A. war gas B. insecticide c. drug D. preservative |
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| 279 | Impure chloroform gives precipitate with ( A g N O_{3} ) due to the presence of: A ( cdot C O C l_{2} ) в. НС l c. ( C H_{2} C l_{2}+H C l ) D. ( C C l_{4} ) |
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| 280 | An organic compound which produces a bluish-green coloured flame on heating in presence of copper is: ( A ). chlorobenzene B. benzaldehyde c. anlline D. benzoic acid |
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| 281 | Arrange the following in increasing order of their nucleophilicity in a polar aprotic solvent. ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{O}^{-}, boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{S}^{-}, boldsymbol{C H}_{3} boldsymbol{C S}_{2} ) A ( cdot C H_{3} C S_{2}^{-}<C H_{3} C H_{2} O^{-}<C H_{3} C H_{2} S^{-} ) в. ( C H_{3} C H_{2} O^{-}<C H_{3} C S_{2}^{-}<C H_{3} C H_{2} S^{-} ) c. ( C H_{3} C H_{2} S^{-}<C H_{3} C S_{2}^{-}<C H_{3} C H_{2} O ) D. None of these |
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| 282 | st cut you . Tuotto olqis Which of the following alcohols will yield the corresponding alkyl chloride on reaction with concentrated HCl at room temperature: (a) CH2CH2 – CH2-OH (b) CH2CH2-CH-OH Сн, CH, (C) CH CH2 – CH-CH2OH (d) CH3CH2-C-OHH CH, Thinking Process CH₂ |
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| 283 | 195. Which will form 2, 2-dibromopropane with HBr? (a) CH=CH-CH, (b) CH,C=CH (C) CH,C=CH, (d) Both (b) and (c) Br |
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| 284 | Draw a structural formula for the product of each ( S N_{1} ) reaction. Where the configuration of the starting material is given, show the configuration of the product |
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| 285 | Which of the following dihalobenzene is solid at room temperature? A. Ortho B. Meta c. Para D. None of these |
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| 286 | What is the product in the given reaction? |
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| 287 | Which of the following is used as anesthetic? в. ( C H C l_{3} ) c. ( C H_{2} C l_{2} ) D. ( D D T ) |
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| 288 | Identify the name of the following reaction. ( boldsymbol{C H}_{3} boldsymbol{B r}+boldsymbol{N a I} stackrel{text {dryacetone}}{longrightarrow} boldsymbol{C H}_{3} boldsymbol{I}+ ) ( N a B r ) A. Finkelstein reaction B. Gattermann reaction c. sandmeyer reaction D. Wurtz reaction |
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| 289 | Correct relationship between the two structure given below is: A. enantiomers B. tautormers c. geometrical isomers D. constitutional isomers |
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| 290 | Give term that describes compounds (a) and (b). A. Enantiomers B. Chiral molecule c. Diastereomers D. Same compounds |
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| 291 | 220. Arrange in order of decreasing trend towards electrophilic substitution reactions: Chlorobenzene (I), benzene (II), toluene (III), anilinium chloride(IV) (a) III > II >I>IV (b) IV>I> II > III (c) II>I> IV> III (d) I > II > IV > III |
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| 292 | 231. Order of rate of electrophilic substitution reaction is: NH NH NH NH (R) (a) Q>P>S>R (C) P>Q>S>R (S) (b) Q>P>R>S (d) P>Q>R>S |
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| 293 | Which of the following will give Hofmann alkene? This question has multiple correct options |
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| 294 | Equal amounts of ( (e, e) ) and ( (a, a) ) conformers of trans – 1, 2 – dichloro cyclohexane exist in non-polar solvents but the (e, e) conformer exists in polar solvents. Explains. |
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| 295 | How many Br groups present in compound ( mathrm{H} ) | 12 |
| 296 | The structure shows: A. geometrical isomerism B. optical isomerism c. geometrical and optical isomerism D. tautomerism |
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| 297 | Amongst the primary alkyl halides the order of reactivity is: ( boldsymbol{C H}_{3} boldsymbol{X}>boldsymbol{C}_{2} boldsymbol{H}_{5} boldsymbol{X}>boldsymbol{C}_{3} boldsymbol{H}_{7} boldsymbol{X}, ) etc. |
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| 298 | lodoform belongs to which of the following alkyl halide? A. Primary alkyl halide B. Secondary alkyl halide c. Tertiary alkyl halide D. None of these |
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| 299 | Allyl bromide is: ( mathbf{A} cdot C H_{2}=C H-C H_{2}-B r ) B ( cdot C H_{2}=C H_{2}-B r ) ( mathbf{c} cdot C H_{3}-C H=C H-B r ) ( mathbf{D} cdot C H_{3}-C H_{2}-C H_{2}-B r ) |
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| 300 | The most reactive compound for electrophilic nitration will be: A. toluene B. benzoic acid c. nitrobenzene D. benzene |
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| 301 | toppr ( E ) Q Type your question 3 ( c ) 2 |
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| 302 | Q.91 Assertion (A) Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent. Reason (R) Oxidising agent oxidises I, into HI. Ae Avertrien in the |
12 |
| 303 | 0.12 The position of Br in the compound in CH CH = CHC(Br)(CH3)2 can be classified as …….. (a) ally! (b) aryl (c) vinyl (d) secondary |
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| 304 | IUPAC name of above compound is: A. 1,2 – dichlorobenzene B. m-dichloro benzene C. 1,6 – dichloro benzene D. o- dichloro benzene |
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| 305 | Paracetamol is a/an A . antipyratic B. analgesic ( c . ) both a and ( b ) D. None of the above |
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| 306 | ( R-X ) bond polarity order is: A. ( C-F>C-C l>C-B r>C-I ) в. ( C-C l>C-F>C-B r>C-I ) c. ( C-B r>C-F>C-I>C-C l ) D. ( C-I>C-C l>C-B r>C-F ) |
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| 307 | Which of the following halides has the least dipole moment? A. 1,2 -Dichlorobenzene B. Dichloromethane c. Trichloromethane D. Ethyl chloride |
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| 308 | 56. Which of the following compounds will give syn- elimination reaction? (a) (b) C1 Me (c) VN-Me |
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| 309 | Which of the following compounds shows the same compound as the given above? ( A ) в. ( c ) ( D ) |
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| 310 | Arrange the following compounds in increasing order of dipole moment. ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{3}, boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{N} boldsymbol{H}_{2}, boldsymbol{C H}_{3} boldsymbol{C I} ) |
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| 311 | Write the structures of the following organic halogen compounds. (i) 2-Chloro-3-methylpentane (ii) p-Bromochlorobenzene (iii) 1 -Chloro-4-ethylcyclohexane (iv) 2 -(2-Chlorophenyl)-1-iodooctane (v) 2 -Bromobutane (vi) 4-tert-Butyl-3-iodoheptane (vii) ( 1- ) Bromo- 4 -sec-butyl-2methylbenzene (viii) 1,4-Dibromobut2-ene |
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| 312 | HI-80°C, H,C=CH-CH=CH, (1) 144. CH2=CH-CH=CH HI/+30°C, H.C-CH=CH-CH, (2) At given temperature, these reactions tell about control of reaction which is: (1) (2) dicit (a) Kinetic Thermodynamic (b) Thermodynamic Kinetic d b ) (c) Kinetic Kinetic (d) Thermodynamic Thermodynamic |
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| 313 | Encircle whichever of the following: a) is the stronger nucleophile (aprotic solvent) : ( boldsymbol{F}^{-} ) or ( boldsymbol{I}^{-} ) b) is the stronger nucleophile (protic solvent) ( : boldsymbol{F}^{-} ) or ( boldsymbol{I}^{-} ) c) is the stronger base ( : boldsymbol{F}^{-} ) or ( boldsymbol{I}^{-} ) d) is the stronger nucleophile (protic solvent): ( N H_{3} ) or ( N H_{2} N H_{2} ) e) is the better leaving group: ( boldsymbol{C H}_{3} boldsymbol{C O O}^{-} boldsymbol{o r} boldsymbol{C H}_{2} boldsymbol{S O}_{3}^{-} ) |
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| 314 | Which of the following halides would undergo nucleophilic substitution more readily? A . 1-chloro-1-butene B. 2-Chloro-1-butene c. 3-Chloro-1-butene D. 4-chloro-1-butene |
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| 315 | Iso-propyl bromide on Wurtz reaction gives: A. Hexane B. Propane c. 2,3 -dirnethylbutane D. Neo-hexarte |
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| 316 | H,OⓇA 236. O co 236. Bry/Fe monobromination byen 30% Monobromination (P) is: Br CH2 he Br NH Br |
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| 317 | Which of the following is an excellent substrate for ( S_{N} 1 ) reaction? A ( cdot R-C H_{2}-X ) B. ( A r-C H_{2}-X ) c. ( C H_{2}=C H-C H_{2}-X ) D. ( C H_{2}=C H-X ) |
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| 318 | Which of the following reacts with ethanol to form chloroform? A. ( operatorname{SOCl}_{2} ) в. ( P C l_{5} ) c. ( H C l ) D. ( mathrm{CaOCl}_{2}+mathrm{H}_{2} mathrm{O} ) |
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| 319 | The spontaneous change in specific rotation of an opacity active compound is called ? A. Mutarotation B. Rearrangements c. Inversion D. Retention |
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| 320 | Which of the following cannot be used for the preparation of iodoform? A. Acetone B. Methanol c. Ethanol D. Acetaldehyde |
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| 321 | Explain the following reaction: (a) Sandmeyer reaction (b) Wurtz’s Fitting reaction |
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| 322 | CH HO C -CI – -OH + or H₂C2 H₂C2 4 (W) (V) 0.35 Which of the following statements are correct about the mechanism of this reaction? (a) A carbocation will be formed as an intermediate in the reaction (b) OH will attach the substrate (ii) from one side and or will leave it simultaneously from other side (c) An unstable intermediate will be formed in which OH and cl will be attached by weak bonds (d) Reaction proceeds through S1 mechanism |
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| 323 | Alkyl halides follow the reactivity sequence, ( boldsymbol{R}-boldsymbol{I}>boldsymbol{R}-boldsymbol{B r}>boldsymbol{R}- ) ( boldsymbol{C l}>boldsymbol{R}-boldsymbol{F} ) A. True B. False |
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| 324 | Among the following the most reactive towards alcoholic ( K O H ) is: A. ( C H_{2}=C H B r ) в. ( C H_{3} C O C H_{2} C H_{2} B r ) ( mathrm{c} cdot mathrm{CH}_{3} mathrm{CH}_{2} mathrm{Br} ) D. ( C H_{3} C H_{2} C H_{2} B r ) |
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| 325 | Question 17. Out of CH CHCIC6H5 and CH3CH2Cl which is more easily hydrolysed by aqueous KOHP In S. 1 reactions, stability of carbocations is responsible for the reactivity The reaction is more likely to take place by Sw1 reaction. |
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| 326 | ( begin{array}{rc} & boldsymbol{C H}_{mathbf{3}} \ text { The IUPAC name of } boldsymbol{C} boldsymbol{H}_{3}- & boldsymbol{C} \ & boldsymbol{C H}_{3}end{array} ) ( boldsymbol{C H}_{2}-boldsymbol{C l} ) is: A. 1-chloro-2,2-dimethylpropane B. 3-Chloro-2,2-dimethylpropane c. 1 -chloro-1,2-dimethylpropane D. 2-chloro-2,2-dimethylpropane |
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| 327 | 154. What is the major product in the reaction below? ~ + CBrC1, ROOR (a) Clz (b) Bro Bromwolle CCl2 CCl2 (d) ^ cclz Br |
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| 328 | ( boldsymbol{C}_{boldsymbol{6}} boldsymbol{H}_{boldsymbol{6}}+boldsymbol{C l}_{2}(boldsymbol{e} boldsymbol{x} boldsymbol{c} boldsymbol{e} boldsymbol{s} boldsymbol{s}) frac{A boldsymbol{n} boldsymbol{h} boldsymbol{y} cdot boldsymbol{A} boldsymbol{c} hat{d}_{3}}{d boldsymbol{a r k}, c o l d} boldsymbol{P} ) Product, ( boldsymbol{P} ) is: ( mathbf{A} cdot C_{6} H_{5} C l ) B ( . C_{6} H_{4} C l_{2} ) c. ( C_{6} H_{6} C l_{6} ) D. ( C_{6} C l_{6} ) |
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| 329 | 150. In which of the following reactions 1, 3-butadiene will be obtained as a major product? (a) Br-CH2-CHA-CH-CH, -Br -(CH3)COK (2mole) (CH3)3 COH (b) HO-CH2 – CH2 – CH, -CH2-OH Conc.H,804, (C) HC = CH – C=CH_H2(1 mole) Ni2B (d) All of these |
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| 330 | ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C H}(boldsymbol{F})-boldsymbol{C H}_{3} ) is a alkyl flouride. A. primary B. secondary c. tertiary D. None of these |
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| 331 | 73. Select the chain propagation steps in the free-radical chlorination of methane. (1) C 2CI (2) CI+CH, CH,CI + H (3) CI+CH, CH,CI + cr (4) Hº + Cl2 → HCl + Clº (5) CH; + Cl2 →→CH,CI + Cr (a) 2,3,5 (b) 1,3,6 ore (c) 3,5 (d) 2, 3, 4 |
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| 332 | 32. Which of the following reactions are correctly represented? (a) R-CH=CH2 + HCI —— R-CH-CH3 Сі hv (b) R-CH=CH, + HI H202 → R-CH2-CH, -I © R-CH=CH2 + HBr H2O2 R-CH2-CH2-BI (d) R-CH=CH, + HI-H202, R-CH-CH3 hy |
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| 333 | Molecules which rotate plane of polarised light in either of direction are: A. optically active B. optically inactive c. meso compound D. none of these |
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| 334 | The false statement regarding alkane is A. this does not perform polymerization reaction. B. this does not gives elimination reaction. C . it does not disappear the colour of dilute ( K M n O_{4} ) solution.. D. it does not decolourise bromine water. |
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| 335 | Q4. Give equation for the following: (i) Electrophilic Substitution (ii) Nucleophilic Substitution |
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| 336 | Which of the following cannot give a precipitate with an aqueous solution of ( A g N O_{3} ? ) A. ( K I ) в. ( K_{2} S O_{4} ) c. ( C H C l_{3} ) D. KCl |
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| 337 | In the preparation of ary1 halides by sandmeyer’s reaction, name the: 1) Catalyst used 2) Gas liberated |
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| 338 | Total number of ( S_{N} 1 ) products formed during given reaction will be: | 12 |
| 339 | Assertion Benzyl bromide when kept in acetone water produces benzyl alcohol. Reason The reaction follows ( S_{N} 2 ) mechanism. Read the above assertion and reason and choose the correct option regarding ¡t. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 340 | ( boldsymbol{B e}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{B r} rightarrow boldsymbol{H}-boldsymbol{C} equiv ) ( C-H ) The reagents for the following conversion, is/are: A. Alcoholic ( K O H ) B. Alcoholic KOH followed by ( operatorname{NaNH}_{2} ) C. Aqueous KOH followed by NaNH D. ( Z n / C H_{3} O H ) |
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| 341 | Reactivity order of ( S_{N} 1 ) reaction for the following compounds is: ( mathbf{c} ) А. ( a>b>c>d ) в. ( a>d>c>b ) ( c cdot c>d>b>a ) ( . a>b>d>c ) ( c ) |
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| 342 | What is the correct structure of ( 3- ) Bromoprop-1-ene? ( mathbf{A} cdot C H_{3}-C B r=C H_{2} ) B ( . B r-C H=C=C H_{2} ) ( mathbf{c} cdot B r-C H_{2}=C H-C H_{2} ) ( mathbf{D} cdot B r-C H_{2}-C H=C H_{2} ) |
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| 343 | 2-Methylpropane on monochlorination under photochemical condition gives: A. 2 -Chloro-2-methylpropane as major product. B. (1:1) Mixture of 1-chloro-2-methylpropane and 2chloro-2-methylpropane. C. 1 -Chloro-2-methylpropane as major product D. (1:9) Mixture of 1-chloro-2-methylpropane and 2chloro-2-methylpropane. |
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| 344 | 00 00 00 00 000 |
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| 345 | Pick up the correct statement about alkyl halide. A. They show H-bonding B. They are soluble in water C. They are soluble in organic solvents D. They do not contain any polar bond. |
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| 346 | Most readily hydrolised halide is: ( mathbf{A} cdot C_{6} H_{5} C l ) В ( cdotleft(C_{6} H_{5}right)_{2} C H C l ) c. ( C_{6} H_{5} C H_{2} C l ) D ( cdotleft(C_{6} H_{5}right)_{3} C C l ) |
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| 347 | Which of the following does not give white precipitate when boiled with alcoholic silver nitrate: A. allyl chloride B. t-butyl chloride c. chlorobenzene D. benzyl chloride |
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| 348 | Which of the following is used in paint removing? A. ( C H C l_{3} ) в. ( C H_{2} C l_{2} ) c. ( C C l_{4} ) D. ( C H_{3} C l ) |
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| 349 | . 45 Out of o- and p-dibromobenzene which one has higher melting point and why? |
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| 350 | Dipole moment of chlorobenzene is less then cyclohexylchloride A. True B. False |
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| 351 | What is the stereochemistry of the product(s) for an ( S_{N} 2 ) Reaction? A. ( R ) B. ( S ) c. Racemic mixture D. No chiral center in product |
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| 352 | When iodoform is heated with silver powder, the gaseous product formed is: A. ethene B. ethyne c. ethane D. silver iodate |
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| 353 | An alkyl halide in which halogen atom is attached to that ( C ) atom which is attached to only one ( C ) in molecule is called as: A. primary alkyl halide B. secondary alkyl halide c. tertiary alkyl halide D. none of these |
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| 354 | toppr 5 Q Type your question ( A ) ( B ) ( c ) ( D ) |
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| 355 | Which of the following halogen exchange reaction will occur in acetone? A. ( R-I+N a C l rightarrow ) в. ( R-F+K C l rightarrow ) c. ( R-C l+N a l rightarrow ) D. ( R-F+A g B r rightarrow ) |
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| 356 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{B r} frac{A l operatorname{co.KOH}}{Delta} boldsymbol{B} stackrel{boldsymbol{H B r}}{longrightarrow} ) ( C stackrel{N a / text {ether}}{ } D ) the compound D is A. ethane B. propane c. n-butane D. n-pentane |
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| 357 | In which of the following reactions the inversion of configuration takes place? (I) pentan( -2-o l+S O C l_{2} rightarrow ) (II) pentan( -2-o l+C O C l_{2} longrightarrow ) (III) pentan ( -2-o l+(A)+S O C l_{2} ) Pyridine (IV) pentan( -2-o l+ )COCl( _{2} stackrel{text {Pyridine}}{ } ) ( mathbf{A} cdot(I),(I I I) ) в. ( (I),(I I) ) c. ( (I I I),(I V) ) D. ( (I),(I V) ) |
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| 358 | When a sample of compound is considered to be optically pure: A. if only one enantiomer is present B. no enantiomer is present c. if the compound is having racemic mixture D. none |
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| 359 | Which of the following statements is not true about meso compounds? A. They have an internal mirror plane. B. They are optically active c. They are optically inactive. D. They are achiral. |
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| 360 | Which of the following compound is obtained by fermentation reaction of Molasses? A. Chlormethane B. acetone c. Ethanol D. All of the given |
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| 361 | What is the best term to describe the rearrangement that causes the conversion of 3 -bromo- 2,2 dimethylbutane to 2,3 -dimethyl-2butanol? A. 1,2 -methyl shift B. 1, 3- hydride shift c. 1,3 -methyl shift D. 1,2 – hydride shift |
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| 362 | Which of the following is/are the properties of halogen compounds? A. Hydrogen halides are binary compounds of halogens with hydrogen B. They are strong hydrohalic acids when dissolved in water c. Among all the halide compounds the exceptional is ( H F ) D. All of the above |
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| 363 | Assertion ( C H_{3}-C H_{2} I ) reacts more rapidly with strong base in comparison to ( boldsymbol{C} boldsymbol{D}_{3} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{I} ) Reason The elimination of ( H I(text { or } D I) ) in presence of strong base shows ( boldsymbol{E}_{2} ) elimination.The rate determining step involves breaking up of ( C-H ) or ( (C- ) ( D ) ) bond.The ( C-D ) bond being stronger than ( C-H ) and thus elimination is faster in case of ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2} boldsymbol{I} ) A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion. B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 364 | Convert the Ethanol to bromoethane. | 12 |
| 365 | Find out the total number of products (including stereoisomers) in the given reaction: |
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| 366 | General representation of alkyl halides is: A. ( R-X_{2} ) в. ( R_{2} X ) c. ( R-X ) D. none of these |
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| 367 | Chlorofluorocarbons (CFCs) are widely used in air conditioners, refrigerators etc, because of being: A. highly reactive B. flammable c. non-reactive D. all of these |
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| 368 | Addition of mercuric acetate in the presence of water is called as oxymercuration. The adduct obtained gives alcohol on reduction with ( N a B H_{4} ) in alkaline medium. This is known as demercuration. Oxymercurationdemercuration allows Markownikoff’s addition of ( mathrm{H}, mathrm{OH} ) without rearrangement. The net result is the addition of ( H_{2} O . ) Answer the following question: The product ‘C’ formation from B occurs through: A. Enol formation. B. ( S_{N} 1 ) mechanism. c. Neighbouring group particitation. D. ( S_{N} A E ) mechanism. |
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| 369 | An organic compound ( boldsymbol{A}left(boldsymbol{C}_{4} boldsymbol{H}_{9} boldsymbol{C l}right) ) on reaction with ( N a / )diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. ( A ) is: A. t-butyl chloride B. sec-butyl chloride c. isobutyl chloride D. n-butyl chloride |
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| 370 | Which of the following products predominates(major produt) in the following reaction? A. 2 -Chloronitrobenzene B. 3 -Chloronitrobenzene c. 4 -Chloronitrobenzene ( D cdot A, C ) |
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| 371 | Assertion Aryl halides undergo nucleophilic substitution with ease. Reason The carbon-halogen bond in aryl halides has partial double bond character. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct |
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| 372 | The boiling points of haloalkane compounds are higher than haloarene compounds. Why? A. Dipole-dipole intraction B. Vanderwaal forces c. Large surface area D. Intramolecular forces |
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| 373 | Question 10. Allyl chloride is hydrolysed more readily than n- propyl chloride, why? |
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| 374 | Which of the following is detected by carbylamine test? A. ( C O N_{2} H_{4} ) В . ( C_{6} H_{5} N H_{2} ) c. ( C H_{3} C O N H_{2} ) D. ( C_{2} H_{5} C N ) |
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| 375 | Assertion In comparison to ethyl chloride it is difficult to carry out nucleophilic substitution on vinyl chloride. Reason Vinyl group is electron donating. |
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| 376 | A racemic mixture has a net rotation: A. to right of original plane B. to left of original plane C . to right or left of original plane D. zero |
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| 377 | Which of the following is responsible for the depletion of the ozone layer in the upper strata of the atmosphere? A. Ferrocene B. Fullerenes c. Freons D. Polyhalogens |
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| 378 | product in each of the following reactions: (i) ( C H_{3} C H_{2} C H_{2} C l+N a I frac{text { acetone }}{h e a t} ) (ii) ( left(C H_{3}right)_{3} C B r+K O H frac{e text {thanol}}{text {heat}} ) (iii) ( C H_{3} C H(B r) C H_{2} C H_{3}+ ) ( N a O H stackrel{w a t e r}{longrightarrow} ) (iv) ( left(C H_{3}right)_{3} C B r+K O H frac{text {ethanol}}{text {heat}} ) (v) ( C_{6} H_{5} O N a+C_{2} H_{5} C l longrightarrow ) ( (mathrm{vi}) C H_{3} C H_{2} C H_{2} O H+S O C l_{2} longrightarrow ) (vii) ( C H_{3} C H_{2} C H=C H_{2}+ ) ( boldsymbol{H} boldsymbol{B} boldsymbol{r} stackrel{text {peroxide}}{longrightarrow} ) ( left(text { viii) } boldsymbol{C} boldsymbol{H}_{3} boldsymbol{C H}=boldsymbol{C}left(boldsymbol{C H}_{3}right)_{2}+right. ) ( boldsymbol{H} boldsymbol{B} boldsymbol{r} longrightarrow ) |
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| 379 | The following pair of compounds is best described as: A . identical B. diastereomers c. enantiomers D. none of the above |
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| 380 | ( boldsymbol{C}_{6} boldsymbol{H}_{5}-boldsymbol{O} boldsymbol{H} stackrel{boldsymbol{C H} C l_{3}+boldsymbol{K} boldsymbol{O} boldsymbol{H}}{longrightarrow} quad ) Product About the above reaction the incorrect statement is: A. the name of reaction is Riemer teimann’s reaction B. the intermediate in the reaction dichloro carbene c. the final major product is o-hydroxy benzaldehyde D. the final major product is benzyl chloride |
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| 381 | Assertion Alkyl benzene is not prepared by Friedel Craft’s alkylation of benzene. Reason Alkyl halides are less reactive than acyl halides. Read the above assertion and reason and choose the correct option regarding ¡t. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 382 | 22. Consider the following reaction: H,C-CH-CH-CH2 + Br →X + HBr D CH2 Identify the structure of the major product X: (a) HC-CH-CH-CH D CH2 (b) H,C–CH– CH, D CH₂ (c) HỌC – CH–CH CH2 D (d) HỌC-CH-CH-CH, (IIT-JEE 2002) CH |
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| 383 | ( boldsymbol{A} stackrel{boldsymbol{K O B r}}{boldsymbol{C}} boldsymbol{H} boldsymbol{B r}_{3} ) Reactant A is: A. isopropyl alcohol B. methanol c. ethanoic acid D. n-butyl alcohol |
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| 384 | p-Dichlorobenzene has higher m.p. than those of 0 – and ( mathrm{m} ) -isomers. Discuss. | 12 |
| 385 | Explain only reaction mechanism for alkaline hydrolysis of tert-butylbromide. | 12 |
| 386 | ( sigma^{m}=sigma^{*} ) ( Phi ) ( dot{phi}^{*} ) |
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| 387 | The steriochemistry change in following ( boldsymbol{S}_{N} boldsymbol{2} ) is: A. ( S, S ) changes to ( S, S ) B. ( R, R ) changes to ( S, R ) c. ( R, R ) changes to ( R, S ) D. ( S, S ) changes to ( S, R ) |
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| 388 | 2.51 In the presence of peroxide addition of HBr to propene takes place according to anti Markownikoff’s rule but peroxide effect is not seen in the case of HCL and HI. Explain. |
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| 389 | 8 | 12 |
| 390 | How many ( 2^{circ} ) Hydrogen atoms are present in the given following compound? A .2 B. 5 ( c ) ( D ) |
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| 391 | ( beta ) -Elimination or anti-elimination reaction is carried out with base ( left(B^{ominus}right) ) as shown. The following bases are used. ( (I) stackrel{ominus}{O} H(I I) R O^{ominus}(I I I) R C O O^{ominus} ) ( (I V) stackrel{ominus}{C} N(V) N O_{3}^{ominus} ) The decreasing order of reactivity for the above elimination is : A. ( (I I)>(I)>(I V)>(I I I)>(V) ) в. ( (V)>(I I I)>(I V)>(I)>(I I) ) c. ( (I I)>(I)>(I I I)>(I V)>(V) ) D. ( (I)>(I I)>(I I I)>(I V)>(V) ) |
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| 392 | General formula for mono halogen derivatives of alkane is: A. ( C_{n} H_{n+1} X ) B. ( C_{n} H_{2 n} X_{2} ) c. ( C_{n} H_{2 n-1} X ) D. ( C_{n} H_{2 n+1} X ) |
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| 393 | 16. How many distinct monochlorinated products, including stereoisomers) may be obtained when the alkane shown below is heated in the presence of Cl? |
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| 394 | Freon used as refrigent is: A. ( C F_{2}=C F_{2} ) в. ( C H_{2} F_{2} ) c. ( C C l_{2} F_{2} ) D. ( C F_{4} ) |
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| 395 | Out of (ref. image), which is an example of a benzylic halide? |
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| 396 | Which is the correct IUPAC name for ( boldsymbol{C H}_{3}-boldsymbol{C} boldsymbol{H}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{B} boldsymbol{r}: ) ( boldsymbol{C}_{2} boldsymbol{H}_{5} ) A. 1-Bromo-2-ethylpropane. B. 1-Bromo-2-ethyl-2-methylethane. c. 1 -Bromo-2-methylbutane D. 2-Methyl-1-bromobutane |
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| 397 | Assertion PhBr is less reactive than ( C_{2} H_{5} B r ) towards ( S_{N} ) reactions. Reason The forces of attraction between ( boldsymbol{R} boldsymbol{X} ) and ( H_{2} O ) molecules are weaker than those present between the molecules of ( R X ) and water separately. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason are correct |
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| 398 | Density is highest for: A ( . C H_{3} C l ) в. ( C H_{2} C l_{2} ) c. ( C H C l_{3} ) D. ( C C l ) |
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| 399 | 70. CH Br Zn, (1,1-Dimethyl) Above compound can be obtained by reaction: (a) (CH3), CH Br (b) (CH3),CH = CH, CH2N2_, (c) both (a) and (b) (d) none of these |
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| 400 | Choose the correct answer among the alternatives given : ( boldsymbol{C H}_{3}-boldsymbol{C H}-boldsymbol{C H}_{3} stackrel{[a l c K O boldsymbol{H}]}{longrightarrow} ) ( B r ) ( boldsymbol{X} frac{text {peroxide}}{boldsymbol{H B r}} boldsymbol{Y} frac{text {acetone}}{boldsymbol{N a I}} boldsymbol{Z} ) In the given reaction what will be the final product? A. ( C H_{3} C H_{2} C H_{2} I ) в. ( C H_{3} C H_{2} I ) c. ( C H_{3} C H_{2} C H_{2} C H_{2} C H_{3} ) D. ( C H_{3} C H_{2} C H I_{2} ) |
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| 401 | Write the IUPAC name of the above compound. |
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| 402 | ( frac{-}{infty} ) ( frac{sigma}{infty} ) ( sigma ) |
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| 403 | How many sigma bonds are present in ( boldsymbol{C H} boldsymbol{C l}_{3} ? ) ( mathbf{A} cdot mathbf{1} ) B . 2 ( c .3 ) D. |
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| 404 | 175. When 2, 3-dibromobutane is treated with KOH ethanol, 2-bromo-2-butene is formed which does undergo further dehydrobromination to form 2-butune under similar condition because i (a) H and Br are not trans (b) there is no further B-H available (c) vinyl bromide are very less reactive in E, elimination reaction (d) reactant is more stable than product |
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| 405 | molecular formula ( C_{4} H_{8} O_{3} . ) It evolves ( C O_{2} ) with ( N a H C O_{3} .^{prime} X^{prime} ) on reaction with Li ( A l H_{4} ) give achiral compound ‘X’ is: ( A ) B ( c ) D. |
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| 406 | Question 8. In the following pairs of halogen compounds, which compound undergoes faster Syl reaction СІ CI and and |
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| 407 | Which of the following is(are) example(s) of Sandmeyer reaction? This question has multiple correct options A ( cdot C_{6} H_{5} N_{2}^{+} C l^{-} rightarrow C_{6} H_{5} C l ) в. ( C_{6} H_{5} N_{2}^{+} C l^{-} rightarrow C_{6} H_{5} O H ) c. ( C_{6} H_{5} N_{2}^{+} C l^{-} rightarrow C_{6} H_{5} C N ) D. ( C_{6} H_{5} N_{2}^{+} I^{-} rightarrow C_{6} H_{5} I ) |
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| 408 | Number of Chiral C-atoms in glucose and fructose are A. 4 in each B. 3 in each c. 4 in glucose and 3 in fructose D. 3 in glucose and 4 in fructose |
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| 409 | Is this optically active? | 12 |
| 410 | How many monochloro products can be formed when n-butane is subjected to monochlorination? |
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| 411 | Among the following, density is highest for: A. ( C H_{3} F ) в. ( C H_{3} C l ) ( mathrm{c} cdot C H_{3} B r ) D. ( C H_{3} I ) |
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| 412 | What is the name of the following reaction? | 12 |
| 413 | Which of the following is an primary alkyl halide? A. ( C H I_{3} ) в. ( C H_{3}-C l ) ( mathbf{c} cdot C H_{2}-B r_{2} ) D. None of these |
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| 414 | ( boldsymbol{C H}_{3}-boldsymbol{C H}(boldsymbol{C l})-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{C H}_{3} ) and ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C}(boldsymbol{C l})left(boldsymbol{C H}_{3}right)- ) ( C H_{3} ) are both positional and chain isomerism of each other. A. True B. False |
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| 415 | How many chlorine atoms are present in chloretone? ( mathbf{A} cdot mathbf{1} ) B. 2 ( c cdot 3 ) ( D ) |
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| 416 | Which major product is formed in the free-radical bromination of methane by limited supply of bromine? A. Bromomethane B. Dibromomethane c. Tribromomethane D. Tetra bromomethane |
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| 417 | Choose the correct option from the following: A. In the electrophilic substitution of toluene with ( B r_{2} ) iron (III) bromide acts as a Lewis acid. B. In the reaction of toluene with ( C l_{2} / F e C l_{3} ), ortho and para isomers are easily separated. C. Similar reaction with iodine is reversible in nature D. All of these |
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| 418 | Which of the following statements is correct? rhis question has multiple correct options A. Dipole moment B. Stability of free radical c. Basic strength: ( C H_{3} O^{ominus}>stackrel{delta}{O} H>R ) S D. Basic and nucleophilic strength: ( I^{ominus}>B r^{ominus}>C l^{ominus} ) > ( F^{c} ) |
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| 419 | How many chlorine atoms are attached to the carbon atom in chloral? A . 1 B. ( c cdot 3 ) ( D ) |
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| 420 | ( O H ) ( C H_{3}-C H-C O O H stackrel{perp}{C H}-C O ) How many optically active (Lactide) product(s) are formed in given reaction? A . 3 B. 4 c. 2 D. |
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| 421 | 0.4 Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is (a) electrophilic elimination reaction (b) electrophilic substitution reaction (c) free radical addition reaction (d) nucleophilic substitution reaction 11 hloride civing ortho and para |
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| 422 | Q Type your question by ( boldsymbol{S}_{N} mathbf{1} ) IS ( boldsymbol{3}^{v}>boldsymbol{Z}^{v} mathbf{1}^{v} boldsymbol{K} boldsymbol{X} ) and ( mathbf{b} mathbf{y} boldsymbol{nabla} boldsymbol{V}^{-} ) path is ( 1^{circ}>2^{circ}>3^{circ} R X ) Which of the following statements are correct for the above energy diagras of ( boldsymbol{S}_{N} mathbf{1} ) and ( boldsymbol{S}_{N} mathbf{2} ) reactions? ( (a) ) Fig. ( (mathbf{b}) ) This question has multiple correct options ( mathbf{A} cdot(I) ) is Fig (a) and ( (I V) ) in Fig. (b) represent ( S_{N} 1 ) reaction B. ( (I I) ) is Fig (a) and ( (I I I) ) in Fig. (b) represent ( S_{N} 2 ) reaction ( mathbf{C} cdot ) Fig. (a) and Fig. (b) are the energy diagrams for ( 1^{circ} R X ) and ( 3^{circ} R X ) respectively ( D cdot F i g ) (a) and Fig. (b) are the energy diagrams for ( 3^{circ} ) RX and ( 1^{circ} R X ) respectively |
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| 423 | Which of the following is not correctly matched with its IUPAC name? ( mathbf{A} cdot C H F_{2} C B r C l F: 1- ) Bromo- 1 -chloro- ( 1,2,2- ) trifluoroethane B. ( left(C C l_{3}right)_{3} C C l ) : 2-(Trichloromethyl)-1,1,1,2,3,3, 3 heptachioropropane ( mathbf{c} cdot C H_{3} Cleft(p-C l C_{6} H_{4}right)_{2} C H(B r) C H_{3}: 2-mathrm{Bromo}-3,3- ) bis(4-chlorophenyl) butane D ( cdot o-B r C_{6} H_{4} C Hleft(C H_{3}right) C H_{2} C H_{3}: ) 2-Bromo-1- methylpropylbenzene |
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| 424 | Aryl halide is less reactive than alkyl halide towards nucleophilic substitution because: A. of less stable carbonium ion B. due to large ( C-C l ) bond energy c. of inductive effect D. of resonance stabilization and ( s p^{2} ) hybridization of ( C ) attached to halide |
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| 425 | Arrange the following alkyl chlorides in order of decreasing reactivity in a ( boldsymbol{S}_{N} mathbf{1} ) reaction. (I) isopropyl bromide (II) propyl bromide (III) tert-butyl bromide (IV) methyl bromide ( A cdot((11)>(1)>(11)>(1 v) ) B. (I) > (III) > (IV) > (II) ( c cdot(mid V)>(|| mid)>(||)>(mid) ) ( D cdot(1)>(|)>(| I)>(1 vee) ) |
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| 426 | Predict the ( beta ) -elimination product(s) formed when each chloroalkane is treated with sodium ethoxide in ethanol. If two or more products might be formed, predict which is the major product. |
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| 427 | Which is not a characteristic of haloalkanes? A. Alkyl halides are colourless in pure pure form B. Alkyl bromides and iodides develop colour when exposed to light C. Many volatile halogen compounds have sweet smell D. Intermolecular forces are less as compared to hydrocarbons |
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| 428 | Which of the following statement is false? A. Bridgehead halides are inert towards both ( S_{N} 1 ) and ( S_{N} 2 ) reactions. B. The first step in both ( S_{N} 1 ) and ( E 1 ) reactions is the same C ( . S_{N} 2 ) reaction is favoured by weak nucleophile and protic solvent. D. ( E 2 ) eliminations are favoured by the use of a solvent of low polarity and high concentration of a strong base. |
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| 429 | Fill in the blanks by choosing the appropriate word/words from those given in the brackets: (square pyramidal, electrical, 74, 26 ( s p^{3} d^{2}, s p^{3} d, ) chemical, 68,32 tetrahedral, yellow, white, iodoform, Lucas) Propan-2-ol on reaction with iodine and sodium hydroxide gives precipitate and the reaction is called test. |
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| 430 | Pair of enantiomers are: A. ( I, I I ) and ( I I I, I V ) в. ( I, I I ) с. ( I I I, I V ) D. ( I V, V ) |
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| 431 | Which alky halide has maximum density? ( mathbf{A} cdot C_{3} H_{7} F ) B ( cdot C_{2} H_{5} C l ) ( mathrm{c} cdot C H_{3} B r ) D. ( C H_{3} I ) |
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| 432 | Which of the following is used as a catalyst in Friedal kraft’s alkylation reaction? A. Anhydrous ( A l C l_{3} ) в. ( N a C l ) c. ( B e C l_{2} ) D. ( M g C l_{2} ) |
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| 433 | How many pi bonds are present in phosgene? A. B. 2 ( c cdot 3 ) ( D ) |
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| 434 | Question 15. Write the mechanism of the following reaction. nBuBr+ KCN ECOH H20 nBuCN. (1) Write the resonating structures of KCN. (ii) Due to the presence of polar solvent, find the possibility, which product will be formed preferentially? |
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| 435 | 227. Major product obtained in the given reaction H2SO4 → is: (2 Mole) |
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| 436 | Which of the following combinations is correctly matched? ( ^{mathbf{A}} cdot_{C H_{3}-C_{D}^{H}-C l, S_{N^{2}} W a l d e n i n v e r s i o n} ) ( ^{text {B. }} C H_{3}-_{J}^{text {I }} C-C l, S_{N 1} ) Waldeninversion ( mathrm{c}_{C_{6} H_{5}-} stackrel{c_{2}, text { Нь}}{C}-mathrm{Cl}, S_{N 1} ) Only retension ( ^{mathrm{D}} C_{6} H_{5}-begin{array}{c}c_{2}, H_{5} \ C_{H} \ C H_{3}end{array}-C l, S_{N^{1}} O n l y ) inversion |
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| 437 | If optical rotation produced by the compound ( [A] ) is ( +65^{0}, ) then produced by the compound [B] is? ( [mathrm{A}] ) ( [mathrm{B}] ) ( a cdot k b^{-} ) ( mathbf{A} cdot+65^{0} ) B . ( -65^{circ} ) c. zero D. Unpredictable |
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| 438 | Assertion Dipole moment of ( C-F ) bond is less than that of ( C-C l ) bond Reason ( boldsymbol{F} ) is more electronegative than ( boldsymbol{C l} ) Read the above assertion and reason and choose the correct option regarding it. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
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| 439 | Convert benzene to ( 1- )bromo -3 ethylbenzene |
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| 440 | When iodoform is heated with silver powder, it forms: A. methane B. ethane c. acetylene D. ethylene |
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| 441 | The last reactive chlorine is present in: A. Methyl chloride B. Allyl chloride c. Ethyl chloride D. vinyl chloride |
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| 442 | Reactivity order for SN1 (i) ( C H_{3}-underset{C l}{C} H-C H_{2}-C H_{3} ) (ii) ( boldsymbol{P h}-boldsymbol{C H}_{3}-underset{C l}{boldsymbol{C} boldsymbol{H}-boldsymbol{C H}_{3}} ) (iii) ( C H_{3}-quad begin{array}{c}C l \ \ 0 \ 0 C H_{3}end{array}-C H_{3} ) (iv) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{C l} ) A. ( i>i i>i i i>i v ) в. ( i i>i> ) ii ( i>i v ) c. ( i i>i i>i>i v ) D . ( i v>i i i>i i>i ) |
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| 443 | ( a ) ( a ) ( b ) ( a ) |
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| 444 | ( 2^{circ} ) halide among the following is: A. Isopropyl chloride B. Isobutyl chloride c. n-propyl chloride D. n-butyl chloride |
12 |
| 445 | Q Type your question oe 4 3 ( c ) ( D ) |
12 |
| 446 | State with the reason whether the given figures are optically active or not |
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| 447 | On nitration, the major product that chlorobenzene gives is: A. 1-chloro-4-nitrobenzene B. 1-chloro-3-nitrobenzzne c. 1,4 -dinitrobenzene D. 2,4,6 -trinitrobenzene |
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| 448 | Consider the given halogen-containing compounds: The compounds with a net zero dipole moment are: [ text { I. } mathrm{CHCl}_{3} ] II. ( mathrm{CCl}_{4} ). ( quad ) III. ( mathrm{CH}_{2} mathrm{Cl}_{2} ) IV. ( mathrm{CH}_{3} mathrm{Cl} ) v. A. ( (I I),(V) ) в. ( (I I I) ) c. ( (I I I),(I V) ) D. ( (I),(I V) ) E. None |
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| 449 | ( boldsymbol{H} boldsymbol{B r} ) reacts with ( boldsymbol{C H}_{2}=boldsymbol{C H}-boldsymbol{O C H}_{3} ) under anhydrous conditions at room temperature to give: ( mathbf{A} cdot C H_{3} C H O ) and ( C H_{3} B r ) в. ( B r C H_{2} C H O ) and ( C H_{3} O H ) c. ( B r C H_{2} C H_{2} O C H_{3} ) D. ( C H_{3}-C H(B r)-O C H_{3} ) |
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| 450 | Which among the following can be a chiral center? ( A cdot C^{+} ) of a cabocation B. Carbon of a radical c. ( A n s p^{2} ) carbon D. An sp ( ^{3} ) carbon |
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| 451 | Explain the relative rate of ( E 2 ) reaction of the given compounds. A. ( I I I<I<I I ) В. ( I<I I<I I I ) c. ( I I I<I I<I ) D. None of these |
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| 452 | ( 2- ) Chlorobutane 15 percent aq. solution of ethyl ( boldsymbol{P} ) In this reaction ( 70 % ) racemization takes place. % of the inverted product would be: A . 30 B. 70 c. 35 D. 65 |
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| 453 | The racemic mixture of Alanine ( left(begin{array}{c}mathbf{C H}_{3} mathbf{C} mathbf{H}-mathbf{C} mathbf{O} mathbf{O} mathbf{H} \ mathbf{N} mathbf{H}_{2}end{array}right) ) can be resolved by using: (a) ( (+)-2-B u t a n o ) (b) (I) – 2-Chlorobutanoic acid ( (c)(pm)-2-B u t a n o ) (d) (dl mix)-2-Chlorobutanoic acid ( A cdot a ) and ( b ) only B. a and conly C. ( b ) and ( d ) only D. a and donly |
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| 454 | Convert chlorobenzene to ( mathrm{p} ) chloranitrobenzene. |
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| 455 | (1) 1,2 -dihydroxybenzene (II) 1,3 -dihydroxybenzene (III) 1,4 -dihydroxybenzene (IV) Hydroxybenzene. The increasing order of boiling points of above mentioned alcohols is: ( A cdot|<||<|||<mid V ) c. IV < Is II <III D. IV < || < |< || |
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| 456 | Q. 19 What should be the correct IUPAC name for diethylbromomethane? (a) 1-bromo-1, 1-diethylmethane (b) 3-bromopentane (c) 1-bromo-1-ethylpropane (d) 1-bromopentane ce |
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| 457 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{C l} ) is an example of : A. primary alkyl halide B. secondary alkyl halide C. tertiary alkyl halide D. none of these |
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| 458 | Which of the following react with ( C l_{2} ) and ( B r_{2} ) at room temperature and in the absence of diffused sunlight to produce dihalogen derivatives? A. Cyclobutane B. cyclopentane c. cyclohexane D. All of these |
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| 459 | The compund ( X ) is : A. chlorobenzene B. m-dichloro benzene C. benzene hexachloride D. p- dichlorobenzene |
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| 460 | ( frac{-}{infty} ) | 12 |
| 461 | Identify A and B in the following: | 12 |
| 462 | The two structures of D-glucopyranose forms are: A. anomers B. enantiomers c. epimers D. diesterioisomers |
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| 463 | The insecticide Gammexane is: A . DDT B. benzene hexachloride c. parathion D. chloral |
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| 464 | Q Type your question- ( bigcircrangle-mathbf{C}=mathbf{C H} frac{mathbf{H B r} / mathbf{R}_{2} mathbf{O}_{2}}{(text { 1equivalent })} ) ( A ) B. ( c ) ( D ) |
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| 465 | The decreasing order of boiling points of alkyl halides is: A. ( R F>R C l>R B r>R I ) B. ( R B r>R C l>R I>R F ) c. ( R I>R B r>R C l>R F ) D. ( R C l>R F>R I>R B r ) E ( . R I>R F>R C l>R B r ) |
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| 466 | Freons are: A. highly stable B. unreactive C . easily liquefiable gases D. All the above |
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| 467 | The compounds used as refrigerant are: This question has multiple correct options A. ( N H_{3} ) в. ( C C l_{4} ) c. ( C F_{4} ) D. ( C F_{2} C l_{2} ) E. ( C H_{2} F_{2} ) |
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| 468 | When ( 1 % ) of ( C_{2} H_{5} O H ) is added to ( C H C l_{3}, ) the phosgene present in chloroform is converted to: A. ( C H_{3} C O O C_{2} H_{5} ) в. ( C H_{3} ) СОСН( _{3} ) c. ( left(C H_{3} C H_{2} Oright)_{2} C O ) D. ( C H_{3} ) СООН |
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| 469 | Ethyl alcohol reacts with thionyl chloride to give: A ( cdot C H_{3} C H_{2} C l+H C l ) в. ( C H_{3} C H_{2} C l+H_{2} O+S O_{2} ) c. ( C H_{3} C H_{2} C l+H C l+S O_{2} ) D. ( C H_{3} C H_{2} C l+S O_{2}+C l_{2} ) |
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| 470 | Complete the reaction. | 12 |
| 471 | Select whether the following combinations of reactants will react by substitution ( left(S_{N^{1}} text { Or } S_{N^{2}} ) mechanism) right. elimination ( left(E_{1} text { or } E_{2} ) mechanism) right. A ( cdotleft(S_{N^{1}}right) ) в. ( left(S_{N^{2}}right) ) ( c cdot E_{1} ) D. ( E_{2} ) |
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| 472 | Question 4. Among the isomeric alkanes of molecular formula C3H123 identify the one that on photochemical chlorination yields (i) a single monochloride (ii) three isomerie monochlorides (iii) four isomerie monochlorides. (i) The molecular formula C H, can be represented by three structural isomers. These are CH3 HC-C–CH3 CH₃CH₂ – CH₂ – CH₂ CH₃ Pentane CH3 2.2-dimethylpropane (neo-pentane) CH3-CH-CH2 – CH3 CH₃ 2-methylbutane (Iso-pentane) (1) Number of monochlorides depends upon the types of hydrogen atoms present in the molecule. So, find the different types of hydrogen atoms and give answer on this basis. |
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| 473 | ( X ) is an optically active alkane having lowest molecular mass. Predict the structure of the major product obtained on monochlorination of ( boldsymbol{X} ) A ( cdot C H_{3}-C H_{2}-C H_{2}-C(C l)left(C H_{3}right)-C H_{2}-C H_{3} ) B. ( C H_{3}-C H_{2}-C H_{2}-C Hleft(C H_{3}right)-C H(C l)-C H_{3} ) c. ( C H_{3}-C H_{2}-C H_{2}-C Hleft(C H_{3}right)-C H_{2}-C H_{2}-C l ) D. ( C l-C H_{2}-C H_{2}-C H_{2}-C Hleft(C H_{3}right)-C H_{2}-C H_{3} ) |
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| 474 | Halide containing halogen attached to ( s p^{2} ) carbon is/are: This question has multiple correct options A. allylic halide B. benzylic halide c. aryl halide D. vinyl halide |
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| 475 | Ethylene reacts with bromine to form: A. chloroethane B. ethylene dibromide c. cyclohexane D. 1-bromo propane |
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| 476 | Consider the above sequence and answer the following Conversion ( left(boldsymbol{C H}_{3}-boldsymbol{C H}_{3} Rightarrow boldsymbol{C H}_{3}-right. ) ( left.C H_{2}-O Hright) Rightarrow ) alcohol is achieved by: A. ( B r_{2} / h v, ) alc. KOH в. ( B r_{2} / h v, ) ая.КОН c. ( B r_{2} / C C L_{4}, L i A l H_{4} ) D. ( B r_{2} / C C l_{4}, N a B H_{4} ) |
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| 477 | Assertion The presence of nitro group facilitates nucleophilic substitution reaction in aryl halide Reason The intermediate carboniun is stablised due to the presence of the nitro group. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason are correct |
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| 478 | Which alkyl halide can be formed with the formula ( C_{5} H_{11} C l ? ) A ( cdot 1^{circ} ) в. ( 2^{circ} ) ( c cdot 3^{0} ) D. All of the above |
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| 479 | На Htc-CI HO 6cil Hoc tcr 2.32 Which of the statements are correct about above reaction! (a) () and (v) both are nucleophiles (b) In (iii) carbon atom is sp hybridised (c) In (iii) carbon atom is sp-hybridised (d) (i) and (v) both are electrophiles |
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| 480 | Propyl Benzene reacts with bromine in presence of light or heat to give: ( A ) B. ( c ) ( D ) |
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| 481 | Which of the following aromatic compound is least reactive towards electrophilic substitutions? ( A ) в. ( c ) D. |
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| 482 | Which of the following is an allylic halide? This question has multiple correct options |
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| 483 | Benzene hexachloride is used as a: A ( cdot ) dye B. antimalarial drug c. antibiotic D. insecticide |
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| 484 | Which one of the following is chloropicrin? ( mathbf{A} cdot C C l_{3}-Cleft(C H_{3}right)_{2} ) ( _{O H} ) в. ( C C l_{3}-N O_{2} ) c. ( C H C l_{2}-C H C l_{2} ) D. ( C C l_{3} ) СНО |
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| 485 | 279. Arrange the following in the order of reactivity towards an electrophilic attack NO, C OMe todo lo Me 1 (O) (O) b ol (1) (II) (III) (IV) 300 (V) (a) V> IV > III > II >I (b) III >V>IV > II >I (C) III > IV>V> II >I (d) V> IV > III > I > II |
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| 486 | Heating chloroform with aqueous sodium hydroxide solution forms: A. sodium acetate B. sodium oxalate c. sodium formate D. chloral |
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| 487 | toppr ( t ) Q Type your question ( B ) ( c ) ( D ) |
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| 488 | In major product, Chlorine is at which position? ( mathbf{A} ) B. 2 ( c cdot 3 ) ( D cdot 4 ) |
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| 489 | The only methyl halide which is a liquid is at room temperature is : A. iodomethane B. bromomethane c. chloromethane D. fluoromethane |
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| 490 | In the reaction ( C_{7} H_{8} frac{3 C l_{2} / Delta}{longrightarrow} X frac{B r_{2} / F e}{ } ) ( boldsymbol{Y} stackrel{Z n / boldsymbol{H} C l}{longrightarrow} boldsymbol{Z} ) The compound ( Z ) is : A. o-bromotoluene B. m-bromotoluene c. p-bromotoluene D. 3-bromo-2, 2, 6-trichlorotoluene |
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| 491 | ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{B r} frac{boldsymbol{N H}_{3}}{text {excess}} ) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{N H}_{2} ) f given product is right then, enter 1 else 0. |
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| 492 | Q. 13 Chlorobenzene is formed by reaction of chlorine with benzene in the presence of ALCL . Which of the following species attacks the benzene ring in this reaction? (a) C . (b) C (c) AICI dd (d) [AICI] AL. |
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| 493 | The dihalides in which halogen atoms are attached to same carbon atom are termed as alkylene dihalides |
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| 494 | On heating glycerol with excess amount of ( boldsymbol{H} boldsymbol{I}, ) the product formed is: A. allyl iodide B. isopropyl iodide c. propylene D. ( 1,2,3- ) triiodopropane |
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| 495 | The ocean is estimated to supply ( 10- ) ( 20 % ) of atmospheric significant contributions coming from biomass burning, salt marshes and wood-rotting fungi. A. methyl chloride B. methyl bromide c. methyl iodide D. None of these |
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| 496 | What happens when (i) chlorobenzene is treated with ( boldsymbol{C l}_{2} / boldsymbol{F} boldsymbol{e} boldsymbol{C l}_{3} ) (ii) ethyl chloride is treated with ( A g N O_{2}, ) and (iii) 2-bromopentane is treated with alcoholic KOH? Write the chemical equation in support of your answer. |
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| 497 | Why are Haloarenes less reactive than haloalkane. |
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| 498 | An optically active halide when allowed to react with ( C N^{ominus} ) gives a racemic mixture, the halide is most likely: A. primary halide B. sec. halide c. tert. halide D. none of these |
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| 499 | State whether the statement is true or false Carbon tetrachloride burns in the air |
12 |
| 500 | IN CF3 137. 1. HBr 2. H2O HN COOH Contra banda | HN ( OH CE, OHloho (d) None of these |
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| 501 | Assertion Following reaction fail to produce benzoic acid Reason Aryl halides do not usually undergo ( S_{N} 2 ) reaction A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct |
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| 502 | The common name of 2-chloro-2- methylpropane is: A. tert-butyl chloride B. sec-butyl bromide c. both A and B D. none of these |
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| 503 | Which of the following is(are) the the product(s) in the above reaction? A. 2 -chloroacetophenone B. 4-chloroacetophenone c. 3 -chloroacetophenone D. Both A and |
12 |
| 504 | Conversion of benzene diazonium chloride to chlorobenzene is: A. Sandmeyer’s reaction B. Stephen’s reaction c. Gomberg reaction D. Schotten-Baumann reaction |
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| 505 | In alkyl halides, the homologous series of alkyl halide is represented as: A. ( C_{n} H_{2 n+1} X ) в. ( C_{n} H_{2 n+4} X ) c. ( C_{n} H_{2 n+3} X ) D. ( C_{n} H_{Z n+2} X ) |
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| 506 | Q.10 Which of the following structures is end given below? of the following structures is enantiomeric with the molecule H₂C₂ Br (A) CH3 (a) (b) C H₂C Br Ho Cum Cat Br Cats Br Br (c) – Нас C2H5 Н.Сасна C inamonable mirror imano |
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| 507 | Arrange the following in increasing order of boiling points. ¡) ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H} boldsymbol{C H}_{2} boldsymbol{I} ) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C l} ) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{I} ) |
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| 508 | Boiling point of alkyl iodide, bromide, chloride and methane are in which of the following order? A . Iodide ( > ) Bromide ( > ) Chloride ( >C H_{4} ) B. ( C H_{4}> ) Chloride ( > ) Bromide( > ) Iodide c. ( C H_{4}> ) Iodide ( > ) Bromide ( > ) Chloride D. Chloride ( > ) Bromide ( > ) Iodide ( >C H_{4} ) |
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| 509 | Q. 89 Assertion (A) Presence of a nitro group at or (A) Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophic Reason (R) Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring. planation of assertion |
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| 510 | ( frac{a}{a} ) | 12 |
| 511 | Which of the following compounds have highest melting point? A. Only I B. Only II c. I and ॥ D. II and III |
12 |
| 512 | Match the compounds/reactions in column I with their correct number of isomers in column II. Matching can be one or more than one. |
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| 513 | Choose the correct increasing order of density of the following compound. A ( cdot C_{3} H_{7} C l<C_{3} H_{7} I<C H_{2} C l_{2}<C C l_{4} ) в. ( C_{3} H_{7} I<C_{3} H_{7} C l<C H_{2} C l_{2}<C C l_{4} ) c. ( C_{3} H_{7} I<C_{3} H_{7} C l<C C l_{4}<C H_{2} C l_{2} ) D. ( C C l_{4}<C H_{2} C l_{2}<C_{3} H_{7} I<C_{3} H_{7} C l ) |
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| 514 | toppr Q Type your question (A) ( (mathrm{C}) ) This question has multiple correct options A ( cdot(B) ) and ( (D) ) are the same product as given B. ( (B) ) is as shown in figure C. ( (D) ) is as shown in figure D. The above reaction is called ipso substitution |
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| 515 | one Q. 90 Assertion (A) In monohaloarenes, further electrophilic substitution occurs at ortho and para positions. Reason (R) Halogen atom is a ring deactivator. |
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| 516 | Which one of the following has the highest dipole moment? ( (i) C H_{2} C l_{2}(i i) C H C l_{3} ) ( (boldsymbol{i} boldsymbol{i} boldsymbol{i}) boldsymbol{C} boldsymbol{C l}_{boldsymbol{4}} ) |
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| 517 | The compound used as refrigerant is : A. Westron B. Hydrogen peroxide c. Gammaxane D. Freon |
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| 518 | Identify the IUPAC name of the compound. ( boldsymbol{H}_{2}-boldsymbol{C}=boldsymbol{C} boldsymbol{H}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{C l} ) |
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| 519 | In order to convert aniline to chlorobenzene, the reagent(s) needed is/are: A. ( C u C l ) в. ( operatorname{NaNO}_{2} / mathrm{HCl} ) and ( mathrm{Cu}_{2} mathrm{Cl}_{2} ) c. ( C l_{2} / C C l_{4} ) D. ( C l_{2} / A l C l_{3} ) |
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| 520 | The correct statement for ( alpha ) elimination is? A. It forms cyclic compounds B. It forms carbine or substituted carbine C. Two atoms are removed from ( alpha ) and ( beta ) positions D. ( ln C H C l_{3} ; alpha ) elimination is not possible |
12 |
| 521 | 3. How many distinct monochlorinated products (including stereoisomers) may be obtained when the alkane shown below is heated in the presence of C1,? |
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| 522 | Fire extinguisher pyrene is: A ( cdot C O_{2} ) в. ( C C l_{4} ) c. ( C H C l_{3} ) D. ( H_{2} C O_{3} ) |
12 |
| 523 | Which of the following gives a precipitate with moist silver oxide? A ( cdot C H_{2}=C H-C l ) В ( cdot C_{6} H_{5} C l ) ( c ) (c) ( D ) ( (d) ) |
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| 524 | IUPAC name is: [ mathrm{CH}_{2}=mathrm{CH}-mathrm{CH}_{2}-mathrm{Cl} ] A. Allyl chloride B. 1-Chloro-3-propene c. 3 -chloro- – propene D. vinyl chloride |
12 |
| 525 | Write note on Wurtz reaction and mention any 2 uses of iodoform |
12 |
| 526 | The reaction of ( t ) -butyl bromide with sodium methoxide mainly produces: ( A ). isobutane B. isobutylene c. ( t ) -butyl methyl ether D. sodium tert-butoxide |
12 |
| 527 | 1. Wurtz reaction will not be observed in CI НО л (b) (a) Br Br (c) CH3 -CH-Br (d) none of these CHzoladinis bonos |
12 |
| 528 | Assertion The para-isomers have higher melting point as compared to their ortho and meta-isomers. Reason It is due to symmetry of para-isomers that fits in crystal lattice better as compared to ortho- and meta-isomers. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 529 | 1-Chlorobutane on reaction with alcoholic potash gives: A. 1 -Butene B. 1-Butanol c. 2 -Butene D. 2-Butanol |
12 |
| 530 | Which of the following side chain reaction/s can be used to reduce the activity groups such as ( (O H) ) or ( left(-N H_{2}right) ? ) This question has multiple correct options A. Benzoylation B. Acetylation c. Tosylation D. sulphonation |
12 |
| 531 | The major product (ester) of the following reaction is? A. A single stereoisomer (optically active) B. A mixture of diastereomers (both optically active) c. A racemic mixture (optically inactive) D. A mixture of four stereoisomers (two racemic mixtures |
12 |
| 532 | . 22 Molecules whose mirror image is non-superimposable over them are known as chiral. Which of the following molecules is chiral in nature? (a) 2-bromobutane (b) 1-bromobutane (c)2-bromopropane (d) 2-bromopropan-2-ol hadith |
12 |
| 533 | ( frac{8}{6} ) | 12 |
| 534 | ( S_{N} 1 ) reaction feasible in ( A ) B. c. D. |
12 |
| 535 | Q.1 Arrange the following in decreasing order of their boiling points. A. n-butane B. 2-methylbutane C. n-pentane D. 2, 2-dimethylpropane (a) A > B> C>D (b) B > C > D > A (c) D > C > B> A (d) C > B> D > A |
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| 536 | 0.65 Allyl chloride is hydrolysed more readily than n-propyl chloride. Why: Ans. As we know that |
12 |
| 537 | Choose the correct answer on basis of reactivity: ( (mathbf{I}) ) ( A cdot(1)<(11)<(11) ) B. (III) < (II) < (I) ( c cdot(1)<(111)<(11) ) D. (III) <(I) <(II) |
12 |
| 538 | 0.75 Aryl halides are extremely less reactive towards nucleophilic substitution. and explain the order of reactivity of the following compounds towards nucleophilic substitution. CI NO ON NO2 NOZ NOT NO2 |
12 |
| 539 | The fire extinguisher ‘Pyrene’ contains: A. carbon dioxide B. carbon disulphide C. carbon tetrachloride D. chloroform |
12 |
| 540 | Benzene reacts with chlorine in presence of light to yield: A. chlorobenzene B. trichlorobenzene c. tetrachlorobenzene D. benzenehexachloride |
12 |
| 541 | The dihalides in which halogen atoms are attached to adjacent carbon atoms are termed: A. vicinal dihalides B. geminal dihalides c. both ( A ) and ( B ) D. none of the above |
12 |
| 542 | 145. What is the product of 1. 4-addition in the reaction shown below? | Ph –CH = CH – CH = CH – Ph – HBr (a) Ph – CH2 -CH=CH-CH – Ph Br (b) Ph – CH, -CH- CH = CH – Ph Bri CH-CH=CH-CH, Brun can -CH-CH=CH-CH2- CH-cu-cucuo |
12 |
| 543 | The IUPAC name is: ( boldsymbol{H}-stackrel{boldsymbol{C}}{boldsymbol{C}}-dot{boldsymbol{C}}-boldsymbol{C l} ) A. 1,2 – dichoroethane B. 2, 2 – dichloroethane c. 1,1 – Dichloroethane D. dichloroethane |
12 |
| 544 | When isobutane is chlorinated in the presence of diffused sunlight, then the product formed is: A. tertiary butyl chloride in major amount B. isobutyl chloride in major amount c. both ( 50 % ) each D. n-butyl chloride, isobutyl chloride and sec-buty chloride are formed |
12 |
| 545 | Total diastereomeric and enantiomeric pairs possible from respectively are:- ( boldsymbol{C H}_{3}-boldsymbol{C} boldsymbol{H}-boldsymbol{C} boldsymbol{H}-boldsymbol{C} boldsymbol{H}_{3} ) ( boldsymbol{C l} ) A . 2,2 B. 2,4 c. 2,3 D. 4,2 |
12 |
| 546 | In the given reaction sequence ( mathrm{X} ) will be: A. Benzoic acid B. Salicylic acid C. Phenol D. Aniline |
12 |
| 547 | Write the chemical formula of Mustard gas and Phosgene. |
12 |
| 548 | Why is boiling point of ethyl bromide higher that that of ethyl chloride? | 12 |
| 549 | Choose the incorrect reaction. ( mathbf{A} cdot 2 C_{2} H_{5} I+2 N a frac{left(C_{2} H_{5}right)_{2} O}{longrightarrow} C_{4} H_{10}+2 N a I ) B ( cdot 2 C_{2} H_{5} B r+Z n stackrel{E t O H}{longrightarrow}left(C_{2} H_{5}right)_{2} Z n+B r_{2} ) ( mathbf{c} cdot_{2 C_{2}} H_{5} I+N a_{2} S longrightarrowleft(C_{2} H_{5}right)_{2} S+2 N a I ) D ( cdot 2 C_{2} H_{5} B r+N a I frac{left(C H_{3}right)_{2} C=O}{longrightarrow} C_{2} H_{5} I+N a B r ) E. All are correct reations |
12 |
| 550 | ( sigma ) ( sigma ) ( sigma ) |
12 |
| 551 | 10. Which of the following reactions will yield 2,2-dibromo- propane? (a) CH2-C=CH + 2HBr → (b) CH,CH=CHBr + HBr → (c) CH=CH + 2HBr -> (d) CH, -CH=CH, + HBr → (AIEEE 2007) |
12 |
| 552 | ( S_{N} 2 ) reaction can be best carried out with: A. primary alkyl halide B. secondary alkyl halide c. tertiary alkyl halide D. all of the above |
12 |
| 553 | 88. How many different alkenes are formed when 2-chlorobutane is treated with ethanolic solution of KOH? (a) 1 (b) 2 (c) 3 (d) 4 |
12 |
| 554 | Subscu vyresulldlice. Question 4. Classify the following compounds as primary, secondary and tertiary halides. (i) 1-bromobut-2-ene (ii) 4-bromo pent-2-ene (iii) 2-bromo-2-methyl propane Solution |
12 |
| 555 | CH, OH The product is: The product is: OH VOH Br (b) CH₂ Br CH2lorult egotea CH CH₂ CH3 CH, (d) Br OL BrYCH, CH CH, OH |
12 |
| 556 | Above reaction is known as: A. Wurtz reaction B. Wurtz fitting reaction C . Fitting reaction D. Kolbe electrolysis |
12 |
| 557 | 0.31 Which is the correct increasing order of boiling points of the following compounds? 1-bromoethane, 1-bromopropane, 1-bromobutane, Bromobenzene (a) Bromobenzene < 1-bromobutane < 1-bromopropane < 1-bromoethane (b) Bromobenzene < 1-bromoethane < 1-bromopropane < 1-bromobutane (C) 1-bromopropane < 1-bromobutane < 1-bromoethane < Bromobenzene (d) 1-bromoethane < 1-bromopropane < 1-bromobutane < Bromobenzene pizo of hydrocarbon part for the same YA |
12 |
| 558 | Isomer ( (I I I) ) on monochlorination gives three products. The isomer ( (boldsymbol{I} boldsymbol{I} boldsymbol{I}) ) is ( A ) B. ( c ) D. |
12 |
| 559 | ( 3- ) Methyl-pent-2-ene on reaction with ( H B r ) in presence of peroxide forms an addition product. The number of possible stereoisomers for the products: A. ( Z ) ero в. ( T w o ) c. Four D. ( operatorname{six} ) |
12 |
| 560 | 57. Which statement is correct about photochemical bromination of butane? CH, CH-CH2-CH, Bry, hvid (a) 1-Bromobutane and 2-Bromobutane are formed in equal amounts. (b) 2-Bromobutane is formed with faster rate than 2-chlorobutane in the other experiment of chlorina- tion. (c) The major product is an equimolar mixture of two compounds (d) Homolysis of C-H bond has lower activation en- ergy than homolysis of Br-Br bond. |
12 |
| 561 | Common name of chloroethene is: A. Benzyl chloride B. Vinyl chloride c. Allyl bromide D. none of these |
12 |
| 562 | The IUPAC name of ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H}- ) ( boldsymbol{C H}_{2}-boldsymbol{C H}_{2} boldsymbol{B r} ) is A. 1-bromopentane B. 1-bromo-3-methylbutane c. 2-methyl-4-bromobutane D. 2-methyl-3-bromopropane |
12 |
| 563 | Which compound in the above pair undergoes faster ( boldsymbol{S}_{N} ) 1 reaction? |
12 |
| 564 | Out of ( C_{6} H_{5} C H_{2} C l ) and ( C_{6} H_{5} C H C l C_{6} H_{5}, ) which is more easily hydrolysed by aqueous ( K O H ? ) |
12 |
| 565 | Bottles containing ( P h I ) and ( P h C H_{2} I ) lost their original labels. They were labelled as ( (A) ) and ( (B) ) for testing. ( (A) ) and ( (B) ) were separately taken in test tubes and boiled with ( N a O H ) solutions The end solution in each tube was made acidic with dilutie ( H N O_{3} ) and some ( A g N O_{3} ) solution was added. Substance ( (B) ) gave a yellow precipitate. Which of the following statements is true for this experiment? A. Addition of ( H N O_{3} ) was unnecessary в. (A) was PhI c. ( (A) ) was ( P h C H_{2} I ) D. ( (B) ) was ( P h I ) |
12 |
| 566 | The product in the following reaction is: ( boldsymbol{P h}-boldsymbol{C l}+boldsymbol{F e} / boldsymbol{B r}_{2} longrightarrow ) Product A . o-bromo-chloro benzene B. p-bromo-chloro benzene c. both of the above D. 2,4,6-tribromo chloro benzene |
12 |
| 567 | The formation of an optically active compound from a chiral molecule is called: A. asymmetric synthesis B. resolution c. walden inversion D. epimerisation |
12 |
| 568 | Give reasons: “The presence of nitro group ( left(-N O_{2}right) ) at ortho/para positions increase the reactivity of haloarenes towards nucleophilic substitution reaction”. |
12 |
| 569 | Write down the structures of the stereoisomers formed when cis-2- butene is treated with bromine. |
12 |
| 570 | Nitro chloroform is prepared by the action of ( boldsymbol{C H C l}_{3} ) and A. hot aq. ( K N O_{3} ) B. hot aq. solution of ( N a N O_{2} ) c. hot conc. ( H N O_{3} ) D. hot dil. ( H C l+a q . N a N O_{2} ) solution |
12 |
| 571 | The absolute configuration of the chiral centers in the following Fischer projection are: A ( cdot 2(S), 3(R) ) B. ( 2(R), 3(S) ) c. ( 2(R), 3(R) ) D. ( 2(S), 3(S) ) |
12 |
| 572 | Which of the following on reaction with chloroform will give chloretone? A. ( H N O_{3} ) в. ( left(C H_{3}right)_{2} C=O ) c. chloral D ( cdotleft(C H_{3}right)_{2} C H C H O ) |
12 |
| 573 | A racemic mixture has: A. ( (+) ) effect on the plane polarised light B. (-) effect on the plane polarised light C. no effect on the plane polarised light D. may be any of (A) or (B) |
12 |
| 574 | Which of the following is least reactive in a nucleophilic substitution reaction? A. ( C H_{2}=C H C l ) в. ( C H_{3} C H_{2} C l ) c. ( C H_{2}=C H C H_{2} C l ) D. ( left(C H_{3}right)_{3} C-C l ) |
12 |
| 575 | Write the equation of reaction of chlrobenzene: Alkylation |
12 |
| 576 | In DDT: A. total 5 chlorine atoms are present B. two chlorine atoms are attached to two phenyl rings each C. three chlorine atoms are attached to the secondary carbon atom D. All the above |
12 |
| 577 | Haloarenes react with halogens in the presence of ferric salt as catalyst to give ortho and para dichloro benzene. Which of the following products predominates in ortho and para isomers in this case? A. ortho-dichlorobenzene B. Para-dichlorobenzene c. Meta-dichlorobenzene D. A and c both |
12 |
| 578 | For a given alkyl group, the boiling points of alkyl halides follow the order: A ( . R I>R B r>R C l ) в. ( R C l>R B r>R I ) c. ( R I>R C l>R B r ) D. ( R B r>R I>R C l ) |
12 |
| 579 | ( delta ) ( delta delta ) ( delta_{d} ) ( 8 . d ) |
12 |
| 580 | Select the best statement for the situation above: A. This mixture given an optical rotation of zero B. Will rotate plane polarised light in clockwise direction C. Will rotate plane polarised light in anticlockwise direction D. None of the above statement is true |
12 |
| 581 | Reaction of ethyl chloride with sodium leads to (in the presence of dry ether): A. ethane B. propane c. n-butane D. n-pentane |
12 |
| 582 | Which of the following is the least volatile? A ( cdot C H_{3}-C H_{2}-C H_{2}-F ) в. ( C H_{3}-C H_{2}-C H_{2}-C l ) c. ( C H_{3} C H-C H ) D. ( C H_{3}-C H_{2}-C H_{2}-B r ) |
12 |
| 583 | In comparison to ( C-C l ) bond in ethyl chloride, the ( C-C l ) bond in vinyl chloride is: A. longer and weaker B. shorter and weaker c. longer and stronger D. shorter and stronger |
12 |
| 584 | Which of the following reaction(s) can be used for the preparation of alkyl halides? (I) ( C H_{3} C H_{2} O H+H C l quad ) anh. ( Z n C l_{2} ) (II) ( C H_{3} C H_{2} O H+H C l rightarrow ) ( (| I)left(C H_{3}right)_{3} C O H+H C l rightarrow ) ( (mathrm{IV})left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H O H}+boldsymbol{H C l} stackrel{boldsymbol{a n h . Z n C l}_{2}}{longrightarrow} ) ( mathbf{A} cdot(I V) ) only B. (III) and (IV) onlyyy y c. ( (I),(I I I) ) and ( (I V) ) only D. ( (I) ) and ( (I I) ) only |
12 |
| 585 | From a mixture of ( boldsymbol{C H}_{3} boldsymbol{C l}, boldsymbol{C H}_{2} boldsymbol{C l}_{2}, boldsymbol{C H} boldsymbol{C l}_{3} boldsymbol{a n d} boldsymbol{C C l}_{4} ) chloroform can be seperated by: A. distillation B. fractional distillation c. distillation under reduced pressure D. steam distillation |
12 |
| 586 | 101. The E, product of the following reaction will be н сH, Naoн Br H (b) H CH, V OH H H HS CH, -CH3 (d) HH SE ) |
12 |
| 587 | 0.6 Which reagent will you use for the following reaction. CH3CH2CH2CH3 – CH2CH,CH,CH,Cl + CH3CH2CHCICH3 (a) Cl,/UV light (b) NaCl + H2SO4 (c) Cl, gas in dark (d) Cl, gas in the presence of iron in dark placement of 10 and |
12 |
| 588 | Which of the following will react with AcOAg? This question has multiple correct options A ( . R-N H_{2} ) в. ( R-O T s ) c. ( R-N_{3} ) ( mathbf{D} . quad R-B r ) |
12 |
| 589 | a product ( boldsymbol{E} ). The product ( boldsymbol{E} ) would be: ( A ) ( B ) ( c ) D. none of these |
12 |
| 590 | Which of the following statements are correct about Friedel-crafts reaction? This question has multiple correct options A. It is an aromatic electrophilic substitution reaction. B. The reaction intermediate is an ( bar{e} ) deficient species. C. The reaction involves alkylation and acylation. D. A Lewis acid is used as a catalyst |
12 |
| 591 | Hydrolysis of trichloromethane with aqueous KOH gives? A . acetic acid B. methanol c. formic acid D. ethanol |
12 |
| 592 | ( boldsymbol{R}-boldsymbol{X}+boldsymbol{M} boldsymbol{g} stackrel{mathbf{H}_{2} mathbf{O}}{longrightarrow} ) | 12 |
| 593 | Which of the following will not give a white ppt. When ( A g N O_{3} ) is added to the solution? A. ( C C l_{4} ) B. NaCl c. ( M g C l ) D. KCI |
12 |
| 594 | Which is used as an anaesthetic during surgery? A. Chloroquine B. Thyroxine c. Halothane D. chloramphenicol |
12 |
| 595 | The reaction which will not occur during the formation of chloroform from ( C_{2} H_{5} O H ) and ( C a O C l_{2} ) is: A. addition B. oxidation c. chlorination D. hydrolysis |
12 |
| 596 | Which pair of structures represents the same compound? ( mathbf{A} cdot mid ) and ( V ) B. II and ( v ) C. II and III D. III and |
12 |
| 597 | A convenient reagent for the conversion of bromobenzene into benzonitrile is: A . alc. ( K C N ) alone B. ( K C N ) and pyridine c. silver cyanide D. ( C u C N ) and pyridine |
12 |
| 598 | Which of the following is known as Freon? A ( cdot C C l_{2} F_{2} ) в. ( C H C l_{3} ) c. ( C H_{2} F_{2} ) D. ( C F_{4} ) |
12 |
| 599 | Write the equation of reaction of chlorobenzene: Sulphonation |
12 |
| 600 | Write the chemical reaction of chloroform with the following: (i)Silver powder (ii)Concentrate ( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{3} ) (iii)Acetone (iv)Alkaline Solution of phenol |
12 |
| 601 | 1. Which of the following reactions are not possible? NO CH3 CH3 (a) CH3-C-Br their CH3-C- H D CH3 CH3 LAH Ether (b) ~ NaBH + C2H,OH Red P+HI (d) W a i_Zn + acid |
12 |
| 602 | ( boldsymbol{C}_{7} boldsymbol{H}_{8} stackrel{3 C l_{2} / text {heat}}{rightarrow} boldsymbol{A} stackrel{boldsymbol{F} e / B r}{rightarrow} boldsymbol{B} stackrel{Z boldsymbol{n} / H C l}{rightarrow} boldsymbol{C} ) Here, the compound C is: A. 3 -bromo 2,4,6 -trichlorotoluene B. o-bromotoluene c. P-bromotoluene D. m-bromotoluene |
12 |
| 603 | Assertion: Aryl halides undergo electrophilic substitution more readily than benzene.
Reason: Aryl halide gives a mixture of |
12 |
| 604 | In fire extinguishers, which of the following is used? A. ( C H C l_{3} ) в. ( C S_{2} ) c. ( C C l_{4} ) D. ( C H_{2} C l_{2} ) |
12 |
| 605 | Arrange the following compounds in the increasing order of their densities. ( (mathbf{I}) ) ( (mathrm{II}) ) ( (mathbf{I I I}) ) ( (mathbf{I V}) ) ( A cdot(1)<(11)<(111)<(1 vee) ) ( B cdot(1)<(111)<(11 V)<(11) ) ( c cdot(mid V)<(|| mid)<(text { ii) }<(1) ) ( D cdot(|)<(mid V)<(| I)<(1) ) |
12 |
| 606 | Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is called: A. Wurtz reaction B. Williamson’s reaction c. Fittig’s reaction D. Etard’s reaction |
12 |
| 607 | Q. 15 What is ‘A’ in the following reaction? CH2-CH=CH2 U +HC + HCIA CH2CH=CH2 CH3-CH2-CH2-C1 CH2-CH-CH3 CH-CH2-CH3 bubondoderbone in accordan |
12 |
| 608 | Q. 45 Assertion (A) Toluene on Friedal Crafts methylation gives o- and p- xylene. Reason (R) CHş-group bonded to benzene ring increases electron density at o- and p- position. (a) Both A and R are correct and R is the correct explanation of A (b) Both A and R are correct but R is not the correct explanation of A (c) Both A and R are not correct (d) A is not correct but R is correct |
12 |
| 609 | 228. Which of the following is correct? (a) The rate of sulfonation regarding electrophilic substitution is KC > KC.Do > KC776 . CH3 CH3-CI AICI3, HCI > m-Xylene (major) (c) Rate of the reaction of following with AICI,A is 0-COMe O-COM 0-COMe Me NO2 (d) All are correct |
12 |
| 610 | Type your question ( mathbf{H} ) 4 3 ( c ) ( D ) |
12 |
| 611 | Identify tertiary alkyl halide: A. Tert-butylbromide B. 2-Methyl-2- bromopropane C. Both A and B D. None of these |
12 |
| 612 | 0.16 A primary alkyl halide would prefer to undergo …….. (a) Syl reaction (b) S2 reaction (C) a-elimination (d) racemisation |
12 |
| 613 | ( boldsymbol{P h}-boldsymbol{C H}(boldsymbol{O H}) boldsymbol{C H}_{3} stackrel{boldsymbol{S O C l}_{2}}{longrightarrow} boldsymbol{P h C l}- ) ( quad ) Specific Rotaion ( =+boldsymbol{5 0}^{o} ) ( boldsymbol{C H}_{3} ) What is the specific rotation of the product? A. ( +50^{circ} ) B. ( +60^{circ} ) ( c .-60^{circ} ) D. zero |
12 |
| 614 | Triiodomethane has antiseptic property because of: A. liberation of iodoform B. liberation of free iodine c. formation of phosgene gas D. none of these |
12 |
| 615 | Write the chemical equation of following reaction? (a) Wurtz reaction (b) Finkelstein reaction. |
12 |
| 616 | Chlorobenzene on reaction with acetyl chloride in presence of anhydrous ( A l C l_{3} ) gives major product of: A . 2 – chloro acetanilide B. 2 – chloro acetophenone c. 3 – chloro acetanilide D. 4 – chloro acetophenone |
12 |
| 617 | For each of the following pair, deduce the stereochemical relationship, i.e., whether they are enantiomers, diastereomers or identical. | 12 |
| 618 | Among ( A or B ) which follows a ( boldsymbol{S} boldsymbol{N}_{mathbf{1}} ) mechanism? A. ( left(C H_{3}right)_{3} C C l ) or B. ( boldsymbol{C H}_{3} boldsymbol{C l} ) [Give your answer in terms of A or B] |
12 |
| 619 | The reaction of Sodium methoxide with ( boldsymbol{R}_{2} boldsymbol{C H} boldsymbol{X} ) is: A ( cdot S N^{1} ) в. ( S N^{2} ) c. Elimination D. Substitution |
12 |
| 620 | 76. Ph-CH2-CH-CH2 Brzhv> Product of the above reaction will be: (a) Diastereomers (b) Racemic mixture (c) Meso (d) Constitutional isomers |
12 |
| 621 | Chloroethane is reacted with alcoholic potassium hydroxide. The product formed is : ( A cdot C_{2} H_{6} O ) в. ( C_{2} H_{6} ) ( mathbf{c} cdot C_{2} H_{4} ) D. ( C_{2} H_{4} O ) |
12 |
| 622 | 99. The conversion of 2,3-dibromobutane to 2-butene with Zn is: (a) Redox reaction (b) a-Elimination (c) B-Elimination (d) Both a-elimination and redox reaction |
12 |
| 623 | Which of these will produce the highest yield in Friedel Crafts reaction? ( A ) в. c. D. |
12 |
| 624 | Which of the following can cause liver cancer? A. ( C H C l_{3} ) в. ( C C l_{4} ) c. ( C H_{2} C l_{2} ) D. ( C_{14} H_{9} C l_{5} ) |
12 |
| 625 | Which of the following pair of compounds which will react faster in ( S_{N} 2 ) reaction with ( left(C H_{3}right)_{3} C-B r ) or ( boldsymbol{C H}_{3} boldsymbol{B r} ? ) |
12 |
| 626 | Which of the following give ( boldsymbol{S}_{boldsymbol{N}} mathbf{1} ) reaction? Select the correct answer. I. II. III. ( mathbf{I V} ) ( mathbf{A} cdot(I),(I I) ) and ( (I I I) ) B. ( (I) ) and ( (I I) ) C ( .(I I),(I I I) ) and ( (I V) ) D. ( (I),(I I I) ) and ( (I V) ) |
12 |
| 627 | 232. O J (1) Cl/Fe () H,O, , H+ Identify the product: SOH Br SO3H Br Br SO3H |
12 |
| 628 | Which of the following compounds is expected to be optically active? ( mathbf{A} cdotleft(C H_{3}right)_{2} C H C H O ) в. ( C H_{3} C H_{2} C H_{2} C H O ) c. ( C H_{3} C H_{2} C H(B r) C H O ) D. ( C H_{3} C H_{2} C B r_{2} C H O ) |
12 |
| 629 | In the reaction of p-chlorotoluene with ( boldsymbol{K} boldsymbol{N} boldsymbol{H}_{2} ) in liquid ( boldsymbol{N} boldsymbol{H}_{3}, ) the major product is: A . o-toluidine B. m-toluidine c. p-toluidine D. p-chloroaniline |
12 |
| 630 | Freon 12 is prepared from: A. ( C C l_{4} ) в. ( C H_{2} C l_{2} ) c. ( C H C l_{3} ) D. ( operatorname{cocl}_{2} ) |
12 |
| 631 | Alkyl halides are classified on the basis of: A. nature of halide atom B. nature of carbon atom c. nature of alkyl group D. none of these |
12 |
| 632 | Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene: (i) ( 1- ) Bromo-1-methylcyclohexane (ii) 2 -Chloro-2-methylbutane (iii) 2,2,3 -Trimethyl-3-bromopentane. |
12 |
| 633 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{B r} ) is: A. bromoderivative of alkanes B. derivative of bromo alkanes c. alkyl derivative D. None of these |
12 |
| 634 | What is the nature of ( boldsymbol{C} boldsymbol{H}_{3}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{X} ) bond towards nucleophilic substitution? A. More reactive than halobenzene B. Less reactive than halobenzene c. Equal reactive as halobenzene. D. Non-reactive towards nucleophilic substitution |
12 |
| 635 | ch the reactions given in Column I with the types of reactions giver LƯU LOÁo Le CH = CH – X 82 Match the in Column II. Column 1 Column 11 Nucleophilic aromatic substitution Fe/Cla B CHE -CH=CH2 + HB – CH-CH-CH na Br 2 Electrophilic aroma Substitution CH3-CH- CH3-CH-OH 3. Saytzeff elimination + 4. Electrophilic addition NO2 NO2 CH CH. CHCHE alkaline CH, CH=CHCH3 5. E. Nucleophilic substitution (SN1) Br |
12 |
| 636 | Which of the following compounds has highest boiling point? A. Propan-1-ol B. n-Butane c. chloroethane D. Propanal |
12 |
| 637 | 0 0 0 |
12 |
| 638 | Which of the following halides is capable of exhibiting enantiomerism? A. Ethyl chloride B. Isopropyl bromide c. sec-Butyl iodide D. tert-Butyl chloride |
12 |
| 639 | Halogenation of halo arenes follows which of the following mechanism? A. Nucleophilic sustitution B. Electrophillic substitution c. Addition D. Elimination |
12 |
| 640 | Q. 78 Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer. |
12 |
| 641 | For the reaction, ( C_{2} H_{5} O H+H X stackrel{Z n X_{2}}{longrightarrow} ) ( C_{2} H_{5} X, ) the order of reactivity is: A. ( H I>H C l>H B r ) в. ( H I>H B r>H C l ) c. ( H C l>H B r>H I ) D. ( H B r>H I>H C l ) |
12 |
| 642 | The compound ( Y ) is: ( mathbf{A} cdot C_{6} H_{4} C l_{2} ) ( mathbf{B} cdot C_{6} H_{3} C l_{3} ) ( mathbf{c} cdot C_{6} H_{5}-C_{6} H_{5} ) ( mathrm{D} cdot C_{6} H_{5}-C_{2} H_{5} ) |
12 |
| 643 | The reaction between chloral and chlorobenzene in ( boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} ) yields: A. chloretone B. p,p-dichlorodiphenyl trichloroethane c. o-chlorobenzaldichloride D. chloralphenylchloride |
12 |
| 644 | Which of the following has the highest boiling point? A. ( C_{3} H_{7} C l ) в. ( C_{4} H_{9} C l ) c. ( C H_{3} C Hleft(C H_{3}right) C H_{2} C l ) D. ( left(C H_{3}right)_{3} C-C l ) |
12 |
| 645 | Arrange the following compounds in increasing order of their boiling points. I. ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{B r} ) II. ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{B r} ) III. ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H} boldsymbol{C H}_{2} boldsymbol{B r} ) IV. ( left(boldsymbol{C H}_{3}right)_{3} boldsymbol{C B r} ) A. ( I I<I<I I I<I V ) в. ( I I I<I<I V<I I ) c. ( I V<I I I<I I<I ) II ( I<I V<I I I<I I ) 1 |
12 |
| 646 | Isopropyl alcohol is heated with suspension of bleaching powder ( left(-C a O C l_{2}right) ) with water. The products are: A. ethane and propane B. ethyne and ethene C. trichloromethane and calcium acetate D. carbon tetrachloride |
12 |
| 647 | 146. The reaction of one equivalent of HBr with CH, = CH – C=CH gives: (a) CH4 = CH – C = CBr (b) CH = CH -C=CH, Br (c) CH, -CH-C= CH Br (d) CH = CH – CH = CHBr |
12 |
| 648 | Which of the following will not give halo benzene by reacting with benzene diazonium chloride? ( mathbf{A} cdot C u_{2} B r_{2} / H B r ) в. ( K I ) c. ( S n C l_{2}+H C l ) D. ( C u ) powder ( +H C l ) |
12 |
| 649 | Which of these is/are meso? A. 1 and 2 B. 3 and 4 c. 1 and 4 D. All are Meso |
12 |
| 650 | How many stereocenters are there in the following molecule? ( A ) B. ( c cdot 2 ) ( D ) |
12 |
| 651 | V. 84 Match the reactions given in Column I with the names given in Column II. Column Column II -X+RX Na 1. Fittig reaction +2Na + 2Na Ether ) + 2NX 2 Wurz-Fitig reaction > + 2NaX 2. Wurtz-Fittig reaction Cu 3. Finkelstein reaction D. CH CI + Nal byacetone, CH-1+ Naci 4. Sandmeyer reaction |
12 |
| 652 | Which type of isomerism can not be shown by benzaldoxime? A. Optical isomerism B. Functional group isomerism c. Geometrical isomerism D. configuration isomerism |
12 |
| 653 | Allyl chloride is a …………… compound while vinyl chloride is inert towards nucleophilic substitution. A. reactive B. mildly reactive c. not reactive D. netural |
12 |
| 654 | What are alkyl halides? How is n-propyl bromide prepared from propylene? | 12 |
| 655 | Flourobenzene ( left(C_{6} H_{5} Fright) ) can be synthesised in the laboratory: A. by heating phenol with ( H F ) and ( K F ) B. from aniline by diazotisation followed by heating the diazonium salt with ( H B F_{4} ) C. by direct fluorination of benzene with ( F_{2} ) gas D. by reacting ( P h B r ) with ( N a F ) solution |
12 |
| 656 | Gammexane is the name given to: ( mathbf{A} cdot C_{6} H_{3} C l_{3} ) в. ( C_{6} H_{4} C l_{2} ) ( mathbf{c} cdot C_{6} H_{6} C l_{6} ) D. Diphenyltrichloroethane |
12 |
| 657 | What is the product obtained when carbon tetrachloride reacts with water? A. ( C H_{3} O H ) в. ( C H_{3} C l ) and ( H C l ) c. ( C O_{2} ) and ( H C l ) D. No reaction takes place |
12 |
| 658 | Arrange the following compounds in increasing order of boiling points: ( mathrm{I}: C H_{3} C l quad |: C H_{2} C l_{2} ) ( left|: boldsymbol{C} boldsymbol{H} boldsymbol{C l}_{3} quad quadright| boldsymbol{V}: boldsymbol{C} boldsymbol{l}_{4} ) A. ( I<I I<I I I<I V ) в. ( I V<I I I<I I<I ) c. ( I I<I V<I<I I I ) D. ( I V<I I<I<I I I ) |
12 |
| 659 | Q. 11 Which of the following is an example of vic-dihalide? (a) Dichloromethane (b) 1,2-dichloroethane (c) Ethylidene chloride (d) Allyl chloride |
12 |
| 660 | ( left(boldsymbol{C} boldsymbol{H}_{3}right)_{2} boldsymbol{C B r} boldsymbol{C H}_{2} boldsymbol{C H}_{3} ) Give IUPAC name of the compound. |
12 |
| 661 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{B r} frac{M boldsymbol{g}}{text {dryether}} boldsymbol{A} stackrel{boldsymbol{H}_{2} boldsymbol{O}}{boldsymbol{beta}} boldsymbol{B} ) Identify ( A & B ) compounds. |
12 |
| 662 | ( S_{N} 1 & S_{N} 2 ) is not favourable in: This question has multiple correct options A ( cdot H_{2} C=C H-C l ) в. ( P h-C h_{2}-C l ) c. ( P h-C l ) D. ( H_{2} C=C H-C H_{2}-C l ) |
12 |
| 663 | vny is it necessary to avoid even traces of moisture during the use of a Grignard reagent? |
12 |
| 664 | Pure chloroform does not give a white ppt with ( boldsymbol{A} boldsymbol{g} boldsymbol{N} boldsymbol{O}_{3} ) as: A. It does not ionise to give chloride ion. B. It forms a soluble complex. c. It is immiscible with the solution. D. ( A g N O_{3} ) solution is weak in conc. |
12 |
| 665 | ( C C l_{4} ) is the: A. monohalogen derivative of alkane. B. dihalohalogen derivative of alkane. C. trihalogen derivative of alkane. D. polyhalogen derivative of alkane. |
12 |
| 666 | In the following sequence of reaction: ( boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{C H}_{2} boldsymbol{B r} frac{boldsymbol{K O H}(boldsymbol{a l} boldsymbol{c})}{(boldsymbol{A})} stackrel{boldsymbol{H B r}}{longrightarrow} ) ( (B) frac{K O H(a q)}{(C)} ) |
12 |
| 667 | Choose the correct answer among the alternatives given : The end product of (Q) in the following sequence of reaction is: ( A ) в. ( c ) ( D ) |
12 |
| 668 | A solution of ( (R)-2- ) iodobutane, ( [alpha]=15.9^{circ} ) in acetone is treated with radioactive iodied, until 1.0% of iodobutane contain radioactive iodine, the specific rotation of recovered iodobutane is found to be ( -15.58^{circ} ) which statement is correct about above information? This question has multiple correct options A. It has optical purity ( 96 % ) B. % of R in solution is ( 99 % ) c. Racemic mixture is ( 2 % ) D. Final solution is dextrorotatory |
12 |
| 669 | Which of the following is most reactive towards aqueous ( N a O H ? ) A ( cdot C_{6} H_{5} C l ) в. ( C_{6} H_{5} C H_{2} C l ) ( mathbf{c} cdot C_{6} H_{5} B r ) D. ( B r C_{6} H_{4} B r ) |
12 |
| 670 | 212. Which one is the slow step in the chlorination of benzene? (a) Cl + FeCl2 → FeCl+ CI+ + ci CI Cl Feci + FeCl2 + HCI (d) None of these |
12 |
| 671 | Assertion ( (mathrm{A}): C_{2} H_{5} C l ) gives ethyl benzene with benzene in presence of anhydrous aluminium chloride. Reason (R) : Anhydrous aluminium chloride acts as Lewis acid and generates ethyl carbonium ion electrophile. A. Both A and R are true and R is the correct explanation to A B. Both A and R are true and R is not the correct explanation to A c. A is true but R is false D. A is false but R is true |
12 |
| 672 | The IUPAC name of chloretone is: A. Trichloroacetone. B. Trichloronitromethane C . 1,1,1 -Trichloro-2-methyl-2-propanone. D. 1,1,1 -Trichloro-2-methyl-2-propanol |
12 |
| 673 | Which of the following represents Freon? A. Acetylene tetrachloride B. Trichloroethylene c. Dichlorodifluoromethane D. Ethylene dichloride |
12 |
| 674 | The reaction of alkyl halide with benzene in presence of anhydrous ( A l C l_{3} ) gives alkyl benzene.This reaction is known as: A. Friedel-craft’s reaction B. carbylamine reaction c. Gattermann reaction D. Wurtz reaction |
12 |
| 675 | The rate of ( S_{N} 2 ) reaction is maximum when the solvent is: A. ( C H_{3} O H ) в. ( H_{2} ) о c. DMSO D. Benzene |
12 |
| 676 | 8 8 8 8 |
12 |
| 677 | Which of the following rotates the plane of plane polarised light? A. Compound which is having enantiomeric excess B. Diastereomers c. Racemic mixture D. None |
12 |
| 678 | In the above reaction, ( Z ) is: A. toulene B. biphenyl c. 4 -chlorotoulene D. ethyl benzene |
12 |
| 679 | The reagent used for converting benzene to ethyl benzene is: ( mathbf{A} cdot C_{2} H_{5} C l, ) anhydrous ( A l C l_{3} ) в. ( C_{2} H_{5} C l ), а ( q A l C l_{3} ) c. ( C_{2} H_{5} O H ), anhydrous ( A l C l_{3} ) D. ( C_{2} H_{5} C l, S O C l_{2} ) |
12 |
| 680 | The safest general anaesthesia used at present is: A. chloroform B. diethyl ether c. acetylene D. halothane |
12 |
| 681 | Chlorination of methane proceeds by: A. electrophilic substitution B. nucleophilic substitution c. free radical substitution D. none of these |
12 |
| 682 | The IUPAC name of the above shown compound is : A. 2 -bromo-3-methyl pentane B. 2-bromo-3,3-dimethyl butane C. 4 -bromo-3,3-dimethyl butane D. 2-Bromo-3,3-dimethyl pentane |
12 |
| 683 | The end product ‘W’ in the following sequence of reactions is : ( A ) ( P h-C H_{2}-C H_{2}-O-C H-P h ) B. ( P h-C H-O-C H-P h ) c. ( P h-C H_{2}-O-C H_{2}-C H_{2}-P h ) ( D ) |
12 |
| 684 | Which one of the following is best catalyst for the reaction shown below? ( C H_{3}left(C H_{2}right)_{8} C H_{2} B r frac{K C N}{b e n z e n e} C H_{3}left(C H_{2}right) ) ( A ) в. ( c ) D. |
12 |
| 685 | Chloroform, on warming with ( boldsymbol{A} boldsymbol{g} ) powder, gives: A. ( C_{2} H_{2} ) в. ( C_{2} H_{4} ) c. ( C_{2} H_{6} ) D. ( C_{6} H_{6} ) |
12 |
| 686 | Which one is not an allylic halide? A. 3-Chloro cyclohex-1-ene B. 1-chloro but-1-ene c. 1 -chloro but-2-ene D. 3-Chloro prop-1-ene |
12 |
| 687 | Which of the following is tertiary alkyl halide? A ( cdot(C H)_{3} C H C l ) в. ( C H C l_{3} ) c. ( (C H)_{3} C C l ) D. ( C H_{3} C l ) |
12 |
| 688 | Which of the following reaction(s) gives a gem-dichloride? This question has multiple correct options A. ( C H_{3} C H O ) and ( P C l_{5} ) в. ( C H_{3} C O C H_{3} ) and ( P C l_{5} ) c. ( C H_{2}=C H_{2} ) and ( C l_{2} ) D. ( C H_{2}=C H C l ) and ( H C l ) |
12 |
| 689 | Which is the correct increasing order of bond dissociation enthalpy of ( boldsymbol{C}-boldsymbol{X} ) bond? A. ( C-F, C-C l, C-B r, C-I ) в. ( C-I, C-F, C-C l, C-B r ) c. ( C-C l, C-F, C-B r, C-I ) D. ( C-I, C-B r, C-C l, C-F ) |
12 |
| 690 | Arrange in correct order of density: A. ( C H_{2} C l_{2}<C H C l_{3}C C l_{4}>C H C l_{3} ) c. ( C C l_{4}<C H_{2} C l_{2}C C l_{4}<C H C l_{3} ) |
12 |
| 691 | 23. Which of the following will form cyclohexane on reaction with two moles of Na in ether? (a) CH, CH2-Br (b) Br (c) Br-CH, CH, CH, CH, CH2– CH, CI (d) C1- B1 |
12 |
| 692 | Halogenoalkanes are also called as: A. alkyl halide B. haloalkanes C. both ( A ) and ( B ) D. none of these |
12 |
| 693 | ( frac{6}{8} ) | 12 |
| 694 | U DUU ULJU UUM . 39 Which of the following compounds are gem-dihalides? (a) Ethylidene chloride (b) Ethylene dichloride (c) Methylene chloride (d) Benzyl chloride |
12 |
| 695 | Which of the following will have the maximum dipole moment? A. ( C H_{3} F ) в. ( C H_{3} C l ) ( mathrm{c} cdot C H_{3} B r ) D. ( C H_{3} I ) |
12 |
| 696 | Which of the following compounds would react most readily by the ( S_{N} 2 ) mechanism? ( A ) в. ( H_{2} C=C H-B r ) ( c ) D. None of these |
12 |
| 697 | ( (C-C l) ) bond in ( C H_{2}=C H-C l ) (vinyl chloride) is stabilised in the same way as in: A. benzyl chloride B. benzoyl chloride c. chlorobenzene D. allyl chloride |
12 |
| 698 | The boiling point of n-alkyl halide increases regularly with the: A. the increase in the number of carbon atom B. the decrease in number of carbon atom C. boiling point is not related to the number of carbon atoms, but related to odd and even number of carbon present in the compound D. none of these |
12 |
| 699 | ( ln ) a ( S_{N} 2 ) substitution reaction of the type ( boldsymbol{R}-boldsymbol{B r}+boldsymbol{C l}^{-} stackrel{D M boldsymbol{F}}{rightarrow} boldsymbol{R}-boldsymbol{C l}+ ) ( B r^{-} ) Which one of the following has the highest relative rate? ( A ) (1) в. ( C H_{3} C H_{2} B r ) c. ( C H_{3}-C H_{2}-C H_{2} B r ) D. (4) [ begin{array}{c} mathrm{cH}_{3}-mathrm{cH}-mathrm{cH}_{2} mathrm{Br} \ mathrm{CH}_{3} end{array} ] |
12 |
| 700 | Which of the following is the correct order of decreasing ( S_{N} 2 ) reactivity? A ( . R C H_{2} X>R_{3} C X>R_{2} C H X ) в. ( R C H_{2} X>R_{2} C H X>R_{3} C X ) c. ( R_{3} C X>R_{2} C H X>R C H_{2} X ) D. ( R_{2} C H X>R_{3} C X>R C H_{2} X ) |
12 |
| 701 | The vapours of which of the following compound burns with green coloured flame? A. ( C H C l_{3} ) в. ( C H_{3} C O C H_{3} ) c ( cdot C_{2} H_{5} O H ) D. ( C H_{3} C H O ) |
12 |
| 702 | Which one of the following undergoes nucleophilic substitution exclusively by ( boldsymbol{S}_{N} 1 ) mechanism? A. Benzyl chloride B. Ethyl chloride c. chlorobenzene D. Isopropyl chloride |
12 |
| 703 | CH; 96. CH3 -C-X_ale.KOH CH CH3 -C +HX CH3 CH3 The reaction is (a) Spl reaction (c) E, reaction (b) Sp2 reaction (d) E, reaction |
12 |
| 704 | ( mathbf{2} C_{6} boldsymbol{H}_{5} boldsymbol{C l}+mathbf{2} boldsymbol{N} boldsymbol{a} rightarrow boldsymbol{X} ) In the given reaction ( boldsymbol{X} ) is: A. toulene B. biphenyl c. phenyl ethane D. 1-chloro-2-phenyl ethane |
12 |
| 705 | 55. The maximum ease of abstraction of a hydrogen atom by a chlorine atom is shown by (a) (CHR), C—CH, (b) (CHR), CH, (C) CH,CH (d) CH2=CHCH, |
12 |
| 706 | Which of the following compounds is optically active? A. ( C H_{2} C H_{2} C O O H ) в. НООС( – )СН( _{2}- )СООН с. ( C H_{3} C H(O H) )СООН D. ( C l_{2} ) СНСООН |
12 |
| 707 | What product, or products, would you expect from the given reaction? Name the mechanism ( left(S N_{1} text { or } S N_{2}right) ) that gives each product(s). |
12 |
| 708 | Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains: A. mixture of o- and p-bromotoluenes B. mixture of o- and p-dibromobenzenes c. mixture of o- and p-bromoanilines D. mixture of o- and m-bromotoluenes |
12 |
| 709 | Which of the following is the enantiomer of the following compound? A . ( I ) B. II c. ( I I I ) D. It doesn’t have a non-superimposable enantiomer |
12 |
| 710 | 5 8 8 |
12 |
| 711 | Chlorobenzene on fusing with solid NaOH (at ( 623 mathrm{K} ) and 320 atm pressure) gives: A. benzene B. benzoic acid c. phenol D. benzene chloride |
12 |
| 712 | A compound with molecular weight equal to 72 g/mol gives a single monochloride and two dichloride on photochlorination. The hydrocarbon which is consistent with the given information is ( 2,2- ) dimethylpropane. State whether the given statement is correct or not. |
12 |
| 713 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{3} stackrel{boldsymbol{B r}_{2} / boldsymbol{h} boldsymbol{v}}{boldsymbol{A}} ) ( boldsymbol{B} stackrel{boldsymbol{B r}_{2} / boldsymbol{h} boldsymbol{v}}{longrightarrow} boldsymbol{C} stackrel{boldsymbol{N a} / text {ether}}{boldsymbol{D}} ) The compound ( D ) is : ( mathbf{A} cdot C H_{3}-C H_{2}-C H_{2}-C H_{3} ) B ( cdot C H_{3}-C H_{2}-O-C H_{2}-C H_{3} ) ( mathbf{c} cdot C H_{3}-C Hleft(C H_{3}right)-C Hleft(C H_{3}right)-C H_{3} ) ( mathbf{D} cdot C H_{3}-C H_{2}-C H_{3} ) |
12 |
| 714 | begin{tabular}{c} hline 0 \ hline \ hline 0 \ hline 0 \ hline 0 \ hline end{tabular} |
12 |
| 715 | The reaction of toluene with chlorine in the presence of iron and in the absence of light yields: ( A ) в. ( c ) D. mixture of (B) and (c) |
12 |
| 716 | Assertion Primary benzylic halides are more reactive than primary alkyl halides towards ( S_{N} 1 ) reaction Reason Reactivity depends upon the nature of the nucleophile and the solvent A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 717 | Which of the following is an example of vic-dihalide? A. Dichloromethane B. 1, 2-Dichloroethane c. Ethylidene chloride D. Allyl chloride |
12 |
| 718 | 64. Toluene reacts with chlorine in the presence of light to give: (a) benzyl chloride (b) free radical substitution (C) side chain substitution (d) ring substitution |
12 |
| 719 | Halide containing halogen attached to ( s p^{3} ) carbon is/are: This question has multiple correct options A. allylic halide B. vinylic halide c. benzylic halide D. aryl halide |
12 |
| 720 | Give the number of stereoisomers of the product formed in the given reaction. A .2 B. 4 ( c .3 ) ( D ) |
12 |
| 721 | Match the compounds/reactions in List with their formula in List II. Matching can be one or more than one. |
12 |
| 722 | Which of the following is not an allylic halide? A. 4-Bromopent-2-ene B. 3-Bromo-2-methylbut-1-ene c. 1 -Bromobut-2-ene D. 4-Bromobut-1-ene |
12 |
| 723 | Statement I: ( C H C l_{3} ) is stored in transparent bottles. Statement II: ( C H C l_{3} ) is oxidised in air. A. Statement I & Statement II are correct and statement is the correct explanation of statement B. Statement I & Statement II are correct and statement is not the correct explanation of statement! c. statement lis correct and Statement II is wrong D. Statement I is wrong and Statement II is correct |
12 |
| 724 | Which of the following does not exist in solid state at room temperature? This question has multiple correct options A. ( 1,4- ) dichlorobenzene B. 1,3 -dichlorobenzene c. 1,2 -dichlorobenzene D. All of the above |
12 |
| 725 | Which product is obtained when bleaching powder is distilled with acetone? A ( cdot C C l_{4} ) в. ( C H C l_{3} ) c. ( C H_{2} C l_{2} ) D. ( C H_{3} C l ) |
12 |
| 726 | Identify the primary alkyl halide from following: A. ( C H_{3} C H_{2} C l ) в. ( C H_{3} C l ) c. ( C H_{3} C H_{2} C H_{2} C l ) D. all of these |
12 |
| 727 | Nitration of xylene gives only one mononitro derivative. Which xylene is it? A. ortho B. meta c. para D. Both o and |
12 |
| 728 | The IUPAC name of the given compound is: |
12 |
| 729 | 87. The major product of the following reaction is: Bi c i Na/Ether, Bry/hv_ Alc. KOH, |
12 |
| 730 | 2,4-hexadiyne ( left(C_{6} H_{6}right) ) is allowed to react with ( L i ) in ( N H_{3}(text { liq }) . ) The product obtained is treated with 1 equivalent of ( C l_{2} C C l_{4} . ) Which of the following constitutional isomers are possible products? A . I and II B. II and II c. I and IV D. I and III |
12 |
| 731 | Which of the following statement is correct about alkyl halides? A. They are associated with each other by H-bonds. B. They dissolve in water quickly. C. They dissolve easily in organic solvents. D. They do not contain any polar bonds in their molecules. |
12 |
| 732 | Select correct statement about the product (P) of the reaction: This question has multiple correct options A. ( P ) is optically inactive due to internal compensation B. ( P ) is optically inactive due to the presence of plane of symmetry in the molecule c. The structure of P can have three optical isomers possible. D. P can have four possible optical isomers |
12 |
| 733 | Give the IUPAC names of the following compounds: ¡) ( boldsymbol{C H}_{3} boldsymbol{C H}(boldsymbol{C l}) boldsymbol{C H}(boldsymbol{B r}) boldsymbol{C H}_{3} ) ii) ( C H F_{2} C B r C l F ) iii) ( C l C H_{2} C equiv C C H_{2} B r ) iv) ( left(C C l_{3}right)_{3} C C l ) v) ( boldsymbol{C H}_{3} boldsymbol{C}left(boldsymbol{p}-boldsymbol{C l} boldsymbol{C}_{6} boldsymbol{H}_{4}right)_{2} boldsymbol{C H}(boldsymbol{B r}) boldsymbol{C H}_{3} ) vi) ( left(boldsymbol{C H}_{3}right)_{3} boldsymbol{C C H}=boldsymbol{C C l C}_{6} boldsymbol{H}_{4} boldsymbol{I}-boldsymbol{p} ) |
12 |
| 734 | lodine reacts with alcohols to give alkyl iodine only in presence of phosphorus. Why? | 12 |
| 735 | What are the compounds in which two same halogen atoms are attached to the same carbon called? |
12 |
| 736 | 8. 2-Methyl butane on reacting with Br, in the presence of sunlight mainly gives: (a) 1-Bromo-2-methyl butane (b) 2-Bromo-2-methyl butane (C) 2-Bromo-3-methyl butane (d) 1-Bromo-3-methyl butane (AIEEE 2005) |
12 |
| 737 | A sample of chloroform before using as anaesthetic is tested by: A. Fehling solution B. ( A g N O_{3} ) solution c. Boiling with ( K O H ) D. Ammoniacal cuprous chloride |
12 |
| 738 | Which of the following is used as refrigerant? This question has multiple correct options A. ( C H_{3} C O C H_{3} ) в. ( C C l_{4} ) ( mathbf{c} cdot C_{2} H_{5} C l ) D. ( C F_{4} ) |
12 |
| 739 | 53. Which of the following product will form by given reaction M NBS hy (b) HBr Br Br Bri |
12 |
| 740 | Which of the following is the chemical formula of halothane? A ( cdot C F_{3} C H C l B r ) в. ( C H_{3} )СНСl Вт c. ( C F_{3} C H_{2} ) br D. None of the above |
12 |
| 741 | ( boldsymbol{C H I}_{3} ) is commonly named as: ( A ). iodoform. B. iodo alkane c. chloroform D. iodine |
12 |
| 742 | Halo arenes undergo Wurtz-Fitting reaction. (i) What is Wurtz-Fitting reaction? (ii) ref. image Write the formulae of ( A ) and ( B ) in the above reaction? |
12 |
| 743 | The above conversion can proceed throuought is A. carbocation intermediate B. transition state c. free radical intermediate D. carbanion intermediate |
12 |
| 744 | For a given alkyl group, the boiling point is in the order: ( mathbf{A} cdot R I<R B r<R C l ) B . ( R I<R C l<R B r ) c. ( R B r<R I<R C l ) D . ( R C l<R B r<R I ) |
12 |
| 745 | ( C ) ( boldsymbol{C H}_{3}-boldsymbol{C H}-boldsymbol{C H}_{3} ) IUPAC name of the compound is: A. Isopropylchloride B. 2-Chloropropane c. 1 -chloro-1-methylethane D. None of the above |
12 |
| 746 | ( boldsymbol{C H}_{3}-boldsymbol{I}+boldsymbol{2} boldsymbol{N} boldsymbol{a}+boldsymbol{I}-boldsymbol{C} boldsymbol{H}_{3} stackrel{text {dryether}}{longrightarrow} ) A ( cdot C_{2} H_{5}-C_{2} H_{5} ) в. ( C H_{4} ) ( mathbf{c} cdot C_{3} H_{8} ) D. ( C H_{3}-C H_{3} ) |
12 |
| 747 | ( ln S_{N} 1, ) the first step involves the formation of: A. free radical B. carbanion c. carbocation D. final product |
12 |
| 748 | Alcohol ( +H C l leftrightharpoons ) Alkyl halide ( +H_{2} O ) Fo this above reaction, which is needed to make the reaction reversible. A. Anhydrous ( Z n C l_{2} ) в. conc. ( H_{2} S O_{4} ) c. ( C a C l_{2} ) D. Excess of water |
12 |
| 749 | When chloral hydrate is distilled with sodium hydroxide solution, it forms: A. acetaldehyde B. chloral c. chloroform D. ethyl chloride |
12 |
| 750 | ( (+)- ) Mandelic acid has a specific rotation of ( +158^{circ} . ) What would be the observed specific rotation of a mixture of ( 25 %(-)- ) mandelic acid and ( mathbf{7 5 %}(+)- ) mandelic acid: A . ( +118.5^{circ} ) в. ( -118.5^{circ} ) ( mathrm{c} .-79^{circ} ) D. +79 |
12 |
| 751 | Which does not have conjugate system? A ( cdot C H_{2}=C H C l ) в. ( C H_{2}=C H C H O ) c. ( C H_{3} C H=C H_{2} ) D. |
12 |
| 752 | 100. In the dehydrohalogenation of 2-bromobutane, which conformation leads to the formation of cis-2-butene? CH3 CH3 HY CH3 HYCH (a) н BI Вт Brн Br H CH3 CH3 Η Η н Br CHboa H |
12 |
| 753 | Complete the following chemical reactions (b) ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C l}+boldsymbol{K} boldsymbol{C N} stackrel{boldsymbol{Delta}}{longrightarrow} ) ( (c) C H_{3}-C H=C H_{2}+H I rightarrow ) (d) ( C H_{3}-C H_{2}-O H+N a B r+ ) ( boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} rightarrow ) (a) 0 ( mathrm{Cl}+mathrm{CH}_{3}-mathrm{cl} ) anhydrous ( mathrm{AlCl}_{3} ) |
12 |
| 754 | Q. 7 Arrange the following compounds in the increasing order of densities. Brid) (111) or (iv) (a) () < (ii) < (iii) < (iv) (c) (iv) < (iii) < (ii) < 0 (b) (i) < (iii) < (iv) < (ii) (d) (i) < (iv) < (iii) < (0) |
12 |
| 755 | Name the following halides according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides: i) ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H C H}(boldsymbol{C l}) boldsymbol{C H}_{3} ) ii) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C H}left(boldsymbol{C H}_{3}right) boldsymbol{C H}left(boldsymbol{C}_{2} boldsymbol{H}_{5}right) boldsymbol{C l} ) iii) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C}left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H}_{2} boldsymbol{I} ) iv) ( left(boldsymbol{C H}_{3}right)_{3} boldsymbol{C C H}_{2} boldsymbol{C H}(boldsymbol{B r}) boldsymbol{C}_{6} boldsymbol{H}_{5} ) v) ( boldsymbol{C H}_{3} boldsymbol{C H}left(boldsymbol{C H}_{3}right) boldsymbol{C H}(boldsymbol{B r}) boldsymbol{C H}_{3} ) vi) ( boldsymbol{C H}_{3} boldsymbol{C}left(boldsymbol{C}_{2} boldsymbol{H}_{5}right)_{2} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{B r} ) vii) ( boldsymbol{C H}_{3} boldsymbol{C}(boldsymbol{C l})left(boldsymbol{C}_{2} boldsymbol{H}_{5}right) boldsymbol{C H}_{2} boldsymbol{C H}_{3} ) viii) ( boldsymbol{C H}_{3} boldsymbol{C H}= ) ( boldsymbol{C}(boldsymbol{C l}) boldsymbol{C H}_{2} boldsymbol{C H}left(boldsymbol{C H}_{3}right)_{2} ) ix) ( boldsymbol{C H}_{3} boldsymbol{C H}=boldsymbol{C H C}(boldsymbol{B r})left(boldsymbol{C H}_{3}right)_{2} ) ( mathbf{x} ) ) ( boldsymbol{p}-boldsymbol{C l} boldsymbol{C}_{6} boldsymbol{H}_{4} boldsymbol{C H}_{2} boldsymbol{C H}left(boldsymbol{C H}_{3}right)_{2} ) xi) ( boldsymbol{m}-boldsymbol{C l} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{C}_{6} boldsymbol{H}_{4} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{C}left(boldsymbol{C} boldsymbol{H}_{3}right)_{3} ) xii) ( o-B r- ) ( boldsymbol{C} quad mathscr{C H}left(boldsymbol{C H}_{3}right) boldsymbol{C H}_{2} boldsymbol{C H}_{3} ) |
12 |
| 756 | Which of the following halides is not correct according to the name and classification? A ( cdot C H_{3} C H_{2} Cleft(C H_{3}right)_{2} C H_{2} I-1 ) -lodo- 2,2 -dimethylbutane Primary haloallkane B. ( left(C H_{3}right)_{2} C H C H(C l) C H_{3} ) – 2-Chloro-3-methylbutane, Secondary haloalkane C. ( C H_{3} C(C l)left(C_{2} H_{5}right) C H_{2} C H_{3} ) – 2-Chloro-2-ethylbutane Secondary haloalkane D. ( C H_{3} ) ( C H_{3}-C H_{2}-C H-C H-C H_{2}-C H_{3} quad ) 3-Chloro 4- – methylhexane secondary haloalkane |
12 |
| 757 | The reaction is: ( mathbf{A} cdot S_{N} ) B. ( S_{N} ) ? ( mathbf{c} cdot E_{1} ) ( D cdot E_{2} ) |
12 |
| 758 | A compound whose molecules are superimposable on their mirror images even though they contain asymmetric carbon atoms is called: A. a threo compound B. an erythro compound c. a meso compound D. none of these |
12 |
| 759 | Select the best combination of regents which will bring the following conversion ( mathbf{A} cdot B r_{2} / F e B r_{3} ; H N O_{3} / H_{2} S O_{4} ; N a O H ; H_{2} / P t ) B. ( C H_{3} C O C l / A l C l_{3} ; B r_{2} / F e B r_{3} ; N a B H_{4} / C H_{3} O H ) C. ( C H_{3} C l / A l C l_{3} ; K M n O_{4} ; C H_{3} C l / A l C l_{3} ; N B S / h v ; L ) D. ( C H_{3} C l / A l C l_{3} ; H N O_{3} / H_{2} S O_{4} ; N B S / h v / N a O H ) |
12 |
| 760 | butyl bromide undergoes Wurtz reaction to give Q. 88 Assertion (A) tert-butyl bromide undergoes Wu 2,2,3,3-tetramethylbutane. Reason (R) In Wurtz reaction, alkyl halides react with ether to give hydrocarbon containing double the number atoms present in the halide. |
12 |
| 761 | 2.44 Aryl chlorides and bromides can be easily prepared by electrophilic substitution of arenes with chlorine and bromine respectively in the presence of Lewis acid catalysts. But why does preparation of aryl iodides requires presence of an oxidising agent? |
12 |
| 762 | Arrange following compounds according to their reactivity with alc silver nitrate. A. ( C C l_{4} ) > tert-Butyl chloride ( > ) sec- butyl chloride > nbutyl chloride B. n- butyl chloride > sec- butyl chloride > tert-Butyl chloride ( >C C l ) c. tert-Butyl chloride < sec -butyl chloride <n -buty chloride ( sec -butyl chloride >n- buty chloride ( >C C l_{4} ) |
12 |
| 763 | What is CFC? | 12 |
| 764 | HUUTONICULUM Question 6. Arrange each set of compounds in order of increasing boiling points : (1) Bromomethane, bromoform, chloromethane, dibromomethane (ü) 1-chloropropane, iso-propyl chloride, 1-chlorobutane l orer 14 |
12 |
| 765 | Which of the following will give ( boldsymbol{S}_{N} mathbf{2} ) mechanism? ( A ) в. ( c ) D. |
12 |
| 766 | Q. 24 The intermediate carbocation formed in the reactions of HI, HBr and Hai with propene is the same and the bond energy of HCL, HBr and HI is 430.5 kJ mol-, 363.7 kJ mol- and 296.8 kJ mol respectively. What will be the order of reactivity of these halogen acids? |
12 |
| 767 | CH; Br/hv 2 Monobromo derivatives The number of possible monobromo products is (Excluding stereoisomers) (a) 4 (6) 5 (c) 8 (d) 10 |
12 |
| 768 | Which of the following is not a polyhalogen compound? A. Chloroform B. Freon c. Carbon tetrachloride D. Chloro benzene |
12 |
| 769 | Which of the following can be easily oxidized by air? A ( cdot C H_{3} C H_{2} O H ) B ( cdot C_{2} H_{5} C l ) с. ( C H_{3} C H O ) D. ( C H C l_{3} ) |
12 |
| 770 | In general alkyl haldies are insolube in water. The main reason is: A. they are slightly polar B. they do not form hydrogen bonds with ( H_{2} ) O c. the halogen end is repelled by water D. they are unreactive compounds |
12 |
| 771 | ( C-C l ) bond of chlorobenzene in comparison to ( C-C l ) bond of methyl chloride is: A. longer and weaker B. shorter and weaker c. shorter and stronger D. Ionger and stronger |
12 |
| 772 | Order of increasing basic strength. ( (|) ) A ( . I>I I>I I I ) B. ( I I>I I I>I ) c. ( I>I I I>I I ) D. ( I I I>I I>I ) |
12 |
| 773 | Which of the following can be used as the halide component for Friedel-Crafts reaction? A. chloroethene B. Isopropyl chloride c. Chlorobenzene D. Bromobenzene |
12 |
| 774 | Match the isomers given in column with their names given in column II and mark the appropriate choice. (A) – (iii) ( A ) , (B) ( -(i),(C)-(i v),(D)- ) (ii) B. (A) – (iv), (B) – (iii), (C) – (ii), (D) – (i) ( c ) (A) ( -(i),(B)-(i i),(C)-(i i i),(D)-(i v) ) ( D ) (A) – (ii) (B) ( – ) (iii) ( (C)-(i v) ) (D) ( (i ) |
12 |
| 775 | Electrophile that participates in nitration of benzene is: A . ( N O^{+} ) в. ( N O_{2}^{text {t }} ) c. ( N O ) D. ( N O_{3}^{-} ) |
12 |
| 776 | Which of the following reactant will not favour nucleophilic substitution reaction? ( mathbf{A} ) ( mathbf{B} cdot P h-B r ) ( mathbf{c} ) D. All of the above |
12 |
| 777 | Which of the following is used for metal cleaning and finishing? A. ( C H C l_{3} ) в. ( C H I_{3} ) c. ( C H_{2} C l_{2} ) D. ( C_{6} H_{6} ) |
12 |
| 778 | The reaction of toluene with chlorine in the presence of ferric chloride gives predominantly: A. Benzoyl chloride B. ( m- ) chlorotoluene c. Benzyl chloride D. ( o ) – and ( p- ) chlorotoluene |
12 |
| 779 | Define (a) Optical activity (b) Asymmetric carbon atom (c) Enantiomers (d) Racemates. |
12 |
| 780 | The decreasing order of dipole moment of the following is : ( boldsymbol{I} cdot boldsymbol{C} boldsymbol{H}_{3} boldsymbol{C l} ) II. ( boldsymbol{C H}_{3} boldsymbol{B r} ) III ( boldsymbol{C} boldsymbol{H}_{3} boldsymbol{F} ) A ( cdot(I)>(I I)>(I I I) ) в. ( (I)>(I I I)>(I I) ) c. ( (I I)>(I)>(I I I) ) D. ( (I I)>(I I I)>(I) ) |
12 |
| 781 | Q Type your question (a) ( mathbf{B r}_{mathbf{2}} / mathbf{r} boldsymbol{e} ) ( (b) B r_{2} / C C l_{4} ) ( (c) prod B B ) (d) ( boldsymbol{H} boldsymbol{B} boldsymbol{r} ) This question has multiple correct options ( mathbf{A} ) (a) and para ( B ) (b) ( c ) ( (c) ) D. ( (1,2-mathrm{H} ) shift gives more stable benzylic carbocation) ( (d) ) |
12 |
| 782 | 283. Which of the compound undergoes electrophilic substitution most easily? CH OCOCH, | N(C2H3)2 NC,H, CHO CHO |
12 |
| 783 | Among the following, the molecule with the highest dipole moment is : A ( . C H_{3} C l ) B . ( C H_{2} C l_{2} ) c. ( C H C l_{3} ) D. ( C C l_{4} ) |
12 |
| 784 | Assertion: Chloroform gives chloropicrin with ( boldsymbol{H} boldsymbol{N} boldsymbol{O}_{3} ) vapour Reason: Chloropicrin is used as an insecticide A. Both Assertion and Reason are true and Reason is the correct explanation to Assertion B. Both Assertion and Reason are true and Reason is not the correct explanation to Assertion c. Assertion is true but Reason is false D. Assertion is false but Reason is true |
12 |
| 785 | Q. 20 Why do alkenes prefer to undergo electrophilic addition reaction while arenes prefer electrophilic substitution reactions? Explain. |
12 |
| 786 | Which statements is/are correct for the given molecule? (S) A. Molecule is optically inactive B. Plane of symmetry is present in molecule C ( . S_{4} ) alternative axis of symmetry is present in the molecule D. If all the four ( C D C l ) carbon have ( R ) configuration then molecule is optically acitve |
12 |
| 787 | 4. Photochemical fluorination is explosive while iodination is too slow to occur. The reason for this is (a) Bond dissociation energy of I, is minimum (b) Formation of CH, -F is most exothermic (c) Formation of H – F is most exothermic while formation of H-I is endothermic a (d) F, has lower bond dissociation energy than Cl, or Bros |
12 |
| 788 | Which of the following statements is/are true? This question has multiple correct options ( mathbf{A} cdot C H_{3}-C H_{2}-C H_{2}-I ) will react more readily than ( left(C H_{3}right)_{2} C H I ) for ( S_{N} 2 ) reactions B. ( C H_{3}-C H_{2}-C H_{2}-C l ) will react more readily than ( C H_{3}-C H_{2}-C H_{2}-B r ) for ( S_{N} 2 ) reaction ( mathbf{c} cdot C H_{3}-C H_{2}-C H_{2}-B r ) will react more readily than ( left(C H_{3}right)_{3} C-C H_{2}-B r ) for ( S_{N} 2 ) reactions D. ( C H_{3}-O-C_{6} H_{4}-C H_{2} B r ) will react more readily than ( N O_{2}-C_{6} H_{5}-C H_{2}-B r ) for ( S_{N} 2 ) reaction |
12 |
| 789 | Alkyl halide can be converted into alkene by: A. nucleophilic substitution reaction B. elimination reaction c. both nucleophilic substitution and elimination reaction D. rearrangement |
12 |
| 790 | Benzene reacts with chlorine in sunlight to give a final product: A. ( C C l_{4} ) B ( . C_{6} H_{6} C l_{6} ) ( mathbf{c} cdot C_{6} C l_{6} ) D. ( C_{6} H_{5} C l ) |
12 |
| 791 | Arrange the following in the increasing order of their ability as a leaving group: ( boldsymbol{C F}_{3} boldsymbol{S O}_{3}^{-}, boldsymbol{C H}_{3} boldsymbol{S O}_{3}^{-} boldsymbol{a n d} boldsymbol{C H}_{3} boldsymbol{C O O} ) A ( cdot C H_{3} S O_{3}^{-}>C F_{3} S O_{3}^{-}>C H_{3} C O O^{-} ) в. ( C F_{3} S O_{3}^{-}>C H_{3} S O_{3}^{-}>C H_{3} C O O ) c. ( C F_{3} S O_{3}^{-}>C H_{3} C O O^{-}>C H_{3} S O_{3}^{-} ) D. ( C F_{3} S O_{3}^{-}<C H_{3} S O_{3}^{-}<C H_{3} C O O^{-} ) |
12 |
| 792 | ( delta ) ( d ) ( d ) ( sigma ) |
12 |
| 793 | Write the mechanism of the reaction: ( boldsymbol{C H}_{2}=boldsymbol{C H}_{2}+boldsymbol{H} boldsymbol{X} rightarrow boldsymbol{C H}_{3}-boldsymbol{C H}_{2}- ) ( boldsymbol{X} ) |
12 |
| 794 | Choose the correct answer among the alternatives given : The correct order of reactivity is: A. ( A>B>C ) в. ( B>C>A ) c. ( B>A>C ) D. ( C>B>A ) |
12 |
| 795 | A sample of compound is considered to be optically pure: A. if only one enantiomer is present B. if only two enantiomer is present C. if the compound is having recimic mixture D. none of the above |
12 |
| 796 | Which formula represents an alkene? A ( . C H_{4} ) в. ( C_{2} H_{4} ) ( mathbf{c} cdot C_{2} H_{6} ) D. ( C_{2} H_{5} O H ) |
12 |
| 797 | Question 7. Which alkyl halide from the following pairs would you expect to react more rapidly by an Sv2 mechanism? Explain your answer. (1) CH3CH2CH2CH2Br or CH3CH, CH CH, Br CH; (i) CH3CH, CH CHz or H3C-c-Br Br CH3 (iii) CH3CHCH,CH,Br or CH3CH2CHCH,Br CH CHZ If the leaving group is same in two isomers then the reactivity towards Sv2 reaction decreases with increase in steric hindrance. |
12 |
| 798 | In which of the following reactions chlorine acts an oxidising agent. ¡) ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{O H}+boldsymbol{C l}_{2} rightarrow ) ( boldsymbol{C H}_{3} boldsymbol{C H O}+boldsymbol{H C l} ) ii) ( boldsymbol{C H}_{3} boldsymbol{C H O}+boldsymbol{C l}_{2} rightarrow boldsymbol{C C l}_{3} boldsymbol{C H O}+ ) ( boldsymbol{H} boldsymbol{C l} ) iii) ( C H_{4}+C l stackrel{h v}{longrightarrow} C H_{3} C l+H C l ) The correct answer is : A. (i) only B. (ii) only c. (i) and (iii) D. (i), (ii) and (iii) |
12 |
| 799 | ( frac{sqrt{6}}{8} ) ( frac{8}{6} ) ( frac{8}{0} ) |
12 |
| 800 | Lindane can be obtained by the reaction of benzene with: ( mathbf{A} cdot C H_{3} C l / ) anhy. ( A l C l_{3} ) B. ( C l_{2} ) /sunlight c. ( C_{2} H_{5} ) Ilanhy. ( A l C l_{3} ) D. ( C H_{3} C O C l / A l C l_{3} ) |
12 |
| 801 | Which of the following cannot undergo ( E 2 ) reaction? ( A ) B. ( c ) D. |
12 |
| 802 | Which of the following can be used to prepare chloroform? A. Methane B. Ethyne c. Ethanol D. Both ( A ) and ( C ) |
12 |
| 803 | Explain wurtz fitting reaction with example |
12 |
| 804 | Explain the Wurtz-Fittig reaction. | 12 |
| 805 | A pure sample of chloroform is usually obtained from: A ( cdot C H_{3} C H_{2} O H ) в. ( C H_{3} C H O ) c. ( C H_{3} C O C H_{3} ) D. ( C C l_{3} C H(O H)_{2} ) |
12 |
| 806 | toppr ( L ) Q Type your question bromobutane used as the reactant in this reaction? ( A ) B. ( c ) ( D ) |
12 |
| 807 | In the absence of specific data, it can only be said that (R)-2-bromopentane is: A. laevorotatory (-) B. dextrorotatory ( ( + ) ) c. optically inactive D. analogous in absolute configuration to (R)- ( 2- ) chloropentane |
12 |
| 808 | Which of the following is not correct for haloalkanes? A. Density is directly proportional to the mass of compound B. Haloalkanes are slightly soluble in water c. Boiling Point depends upon the intermolecular forces of attraction D. None of these |
12 |
| 809 | Which one is most reactive towards ( S_{N} ) reaction? ( mathbf{A} cdot mathrm{C}_{6} mathrm{H}_{5} mathrm{CH}left(mathrm{C}_{6} mathrm{H}_{5}right) mathrm{Br} ) B. ( mathrm{C}_{6} mathrm{H}_{5} mathrm{CH}left(mathrm{CH}_{3}right) ) Br ( mathrm{c} cdot mathrm{C}_{6} mathrm{H}_{5} mathrm{C}left(mathrm{CH}_{3}right)left(mathrm{C}_{6} mathrm{H}_{5}right) mathrm{Br} ) D. ( mathrm{C}_{6} mathrm{H}_{5} mathrm{CH}_{2} mathrm{Br} ) |
12 |
| 810 | Draw a structural formula for the alkene(s) formed by treatment of each haloalkane with sodium ethoxide in ethanol. Assume that elimination occurs by an ( E_{2} ) mechanism. |
12 |
| 811 | Markovnikov’s rule for the addition of hydrogen halides to alkenes states that the incoming hydrogen bonds to the : A ( cdot s p^{2} ) carbon with the most hydrogens already B. ( s p^{2} ) carbon with the fewest hydrogens already c. ( s p^{3} ) carbon with the most hydrogens already D. ( s p^{3} ) carbon with the few hydrogens already |
12 |
| 812 | How many minimum number of carbons are needed for an optically active ether? ( A cdot 2 ) B. 3 ( c cdot 4 ) D. 5 |
12 |
| 813 | Which of the following compound will give Walden inversion? A ( cdot C_{4} H_{9}-C H(D)-B r ) в. ( C_{6} H_{5}-C H_{2}-B r ) c. ( C H_{2}=C H-C H_{2}-B r ) D. All of the above |
12 |
| 814 | 2-Methyl propane on monochlorination under photochemical condition give: A. 2 -chloro-2-methylpropane as major product B. (1:1) mixture of 1-chloro-2-methylpropane and 2chloro-2-methylpropane C. 1 -chloro-2-methylpropane as a major product D. ( (1: 9) ) mixture of 1 -chloro- 2 -methylpropane |
12 |
| 815 | The starting material used in Sandmeyer’s reaction is A. phenol B. haloarene c. haloalkene D. benzenediazonium chloride |
12 |
| 816 | The main difference in ( C-X ) bond of a haloalkane and a haloarene is: A. ( C-X ) bond in haloalkanes is shorter than haloarnes. B. In haloalkanes, the ( C ) attached to halogen in ( C-X ) bond is ( s p^{3} ) hybridised while in haloarenes it is ( s p^{2} ) hybridised C. ( C-X ) bond in haloarenes acquire a double bond character due to the higher electronegativity of ( X ) than haloalkanes. D. Haloalkanes are less reactive than haloarenes due to difficulty in ( C-X ) cleavage in haloalkanes |
12 |
| 817 | Heating of 2 -chloro-1-phenylbutane with EtOK / EtOH gives ( X ) as the major product. Reaction of ( boldsymbol{X} ) with ( boldsymbol{H} boldsymbol{g}(boldsymbol{O} boldsymbol{A} boldsymbol{c})_{2} / boldsymbol{H}_{2} boldsymbol{O} ) followed by ( boldsymbol{N} boldsymbol{a} boldsymbol{B} boldsymbol{H}_{4} ) gives ( Y ) as the major product. ( Y ) is : ( A ) в. ( c ) ( D ) |
12 |
| 818 | Q. 70 What are the IUPAC names of the insecticide DDT and benzene hexachloride? Why is their use banned in India and other countries: |
12 |
| 819 | Account for the following. (i) The ( C-C l ) bond length in chlorobenzene is shorter than that in ( boldsymbol{C H}_{3}-boldsymbol{C l} ) (ii) Chloroform is stored in closed dark brown bottles. |
12 |
| 820 | Identify chiral molecule among the following. A. Isopropyl alcohol B. Isobutyl alcohol c. 2 -pentanol D. 1-bromo-3-butene |
12 |
| 821 | Which of the following is false? A. Glycerol has strong hydrogen bonding B. Alkyl halides have higher b.p. than corresponding alcohols C. Glycol is a poisonous alcohols D. Waxes are esters of higher alcohols with higher acids |
12 |
| 822 | Freon used as refrigerant is: A. ( C F_{2}=C F_{2} ) в. ( C H_{2} F_{2} ) c. ( C C l_{2} F_{2} ) D. ( C F_{4} ) |
12 |
| 823 | Which is the correct assignment of chirality at ( C 2 ) and ( C 4 ) of the following molecule? A ( .2 S, 4 S ) в. ( 2 R, 4 R ) c. ( 2 S, 4 R ) D. ( 2 R, 4 S ) |
12 |
| 824 | Among the isomers of ( C_{6} H_{1} 4, ) which will give maximum number of mono- chloro-derivatives ? A. 2, 3-dimethyl butane B. 2-methylpentane c. 3-methylpentane D. Hexane |
12 |
| 825 | 8 0 0 0 |
12 |
| 826 | Electrophile used in the nitration of benzene is: A. hydronium ion B. sulphonic acid c. nitronium ion D. bromide ion |
12 |
| 827 | Explain why (i) The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride? (ii) Alkyl halides, though polar, are immiscible with water? (iii) Grignard reagents should be prepared under anhydrous conditions? |
12 |
| 828 | Among which of the following pairs of halogen compounds, the first compound undergoes faster ( boldsymbol{S}_{N} mathbf{2} ) reaction compared to the second? This question has multiple correct options A. ( (a) ) () в. ( (b) ) c. ( (c) ) D. ( (d) ) |
12 |
| 829 | In Dow’s process, the starting raw material is: A. phenol B. chlorobenzene c. aniline D. diazobenzene |
12 |
| 830 | Which of the following is the correct order for strength of ( C-X ) bond? A. ( C H_{3} F<C H_{3} C l<C H_{3} B rC H_{3} C l>C H_{3} B r>C H_{3} ) c. ( C H_{3} I>C H_{3} F>C H_{3} C l>C H_{3} B r ) D. ( C H_{3} C l>C H_{3} B r>C H_{3} F>C H_{3} ) |
12 |
| 831 | The absolute configuration of a molecule changes during: ( A cdot S_{N} ) в. ( S_{N} 2 ) c. free radical substitution D. ( S_{E} ) ? |
12 |
| 832 | Among the following compounds which has the highest boiling point? A. 2-Bromopentane B. 3-Bromopentane c. 1-Bromopentane D. All have same boiling point |
12 |
| 833 | are: and A. enatiomers B. optical inactive diastereomers c. optical active diastereomers D. identical |
12 |
| 834 | Question 20. The treatment of alkyl chlorides with aqueous KOH le to the formation of alcohols but in the presence of alcoholic KOH, alke are major products. Explain. Difference lies in the mode and extent of dissociation of KOH in the presence of different solvents. OH is a good nucleophile while C.H.O a strong base. |
12 |
| 835 | For the given Question (1,2,3) consider the following reaction. Which halogen will give the best yield of a single monohalogenation product? A. ( F_{2} ) в. ( C l_{2} ) ( mathbf{c} cdot B r_{2} ) D. ( I_{2} ) |
12 |
| 836 | Q. 80 Match the items of Column I and Colum II. Column! Column Il A S Treaction vic-dibromides B. Chemicals in fire extinguisher 2. gem-dihalides C Bromination of alkenes Racemisation D. Alkylldene halides Saytzeff rule E Elimination of HX from alkylhalide 5. Chlorobromocarbons 3. |
12 |
| 837 | ( C-X ) bond is strongest in: A ( cdot C H_{3} C l ) в. ( C H_{3} B r ) c. ( C H_{3} F ) D. ( C H_{3} I ) |
12 |
| 838 | Choose the correct order of bond strength: ( mathbf{A} cdot C H_{3} F>C R_{3} C l>C R_{3} B r>C H_{3} I ) B ( cdot C H_{3} F<C R_{3} C l<C R_{3} B rC R_{3} C l>C R_{3} B rC R_{3} C l<C R_{3} B r<C H_{3} I ) |
12 |
| 839 | Which of the following reactions will yield 2,2 -dibromopropane? A. ( C H_{3}-C equiv C H+2 mathrm{HBr} rightarrow ) B. ( C H_{3} C H=C H B r+mathrm{HBr} rightarrow ) c. ( C H equiv C H+2 mathrm{HBr} rightarrow ) D. ( C H_{3}-C H=C H_{2}+ ) HBr ( longrightarrow ) |
12 |
| 840 | a) Write the equations for the steps in ( boldsymbol{S}_{N} 1 ) mechanism of the conversion of teri-Butyl bromide into tert-Butyl alcohol b) Explain Fitting reaction. c) Name the reagent used in the dehydrohalogenation of haloalkanes. |
12 |
| 841 | Write the IUPAC name of the given compound |
12 |
| 842 | Indicate the correct product of the following reaction. (1) ( (|) ) (III) ( A ) B . II ( mathbf{C} cdot | mathbf{I}+mathbf{I V} ) D. There is no net reaction |
12 |
| 843 | 2.81 Match the structures of compounds given in Column I with the classes compounds given in Column II. Column 1 Column II A CH3 -CH-CH3 1 Aryl halide nusib B. CH=CH-CH-X 2. 3 Alkyl halide Vinyl halide D. CH=CH-X 4. Allyl halide |
12 |
| 844 | 0.79 Match the the compounds given in Column I with the Column II. compounds given in Column I with the effect given in Column 1 Column II A. Chloramphenicol 1 Malaria B. Thyroxine Anaesthetic Chloroquine 3. Typhoid fever D. Chloroform 4. Goiter 5. Blood substituent U |
12 |
| 845 | The reaction of toluene with chlorine in the presence of iron and in the absence of light yields ( mathbf{A} ) B. ( c ) D. mixture of (b) and (c) |
12 |
| 846 | The product formed by the reaction between 2,2,2 -trichloroethanal and chlorobenzene in ( boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} ) is: A. chloretone B. DDT C. chlorobenzaldichloride D. benzene sulphonic acid |
12 |
| 847 | 0.48 Haloarenes are less reactive than haloalkanes and haloalkenes. Explain. | 12 |
| 848 | List four characteristic of the images formed by plane mirrors. | 12 |
| 849 | Which of the following compounds has the highest boiling point? A ( cdot C H_{3} C H_{2} C H_{2} C l ) B. ( C H_{3} C H_{2} C H_{2} C H_{2} C l ) c. ( C H_{3} C Hleft(C H_{3}right) C H_{2} C l ) D. ( left(C H_{3}right)_{3} C C l ) |
12 |
| 850 | Action of alcoholic ( A g N O_{3} ) on chlorobenzene is similar to the action on: A. allyl chloride B. vinyl chloride c. isopropyl chloride D. benzyl chloride |
12 |
| 851 | Which one of the following halogen compounds is difficult to be hydrolysed by ( S_{N} 1 ) mechanism? A. Tertiary butyl chloride B. Isopropyl chloride c. Benzyl chloride D. Chlorobenzene E. Allyl chloride |
12 |
| 852 | lodobenzene as the major organic product? This question has multiple correct options |
12 |
| 853 | What is the chemical formula of 2,4 dibromopentane? |
12 |
| 854 | 86. Consider the following reaction СН3 CHz-C-CH2CH3 base Br CH3 CH3 CH2CH3 C=C) + CH2=C_CH; CH3 H Which of the following base will give the best yield of the alkene II as the major product? (a) CHÁO (b) C,H,O (c) (CHỊ) CO (d) (C,H3),CO |
12 |
| 855 | How would you name the following compounds? ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{B r} ) |
12 |
| 856 | Arrange the given set of compounds in order of increasing boiling point: I. 1 -chloropropane II. Isopropyl chloride III. 1 -chlorobutane A. ( I I<I I I<I ) B. ( I<I I<I I I ) c. ( I I<I<I I I ) D. ( I I I<I<I I I ) |
12 |
| 857 | Which of the following cycloalkane gives open chain compound when it reacts with bromine? A. Cyclopropane B. cyclopentane c. cyclohexane D. cyclo-octane |
12 |
| 858 | 22. In which of the following reactions Hoffmann elimination product is major products? CH, (a) CH3-C-CH-CH: CONC, 129 Conc. H2SO4 CH, OH CH; Potassium t-butexide (b) CH-C-CH-CH3 – CH, Br CH ICH3 1. AGOH © CH3-CH2-CH2-CH2-N CH, 2. dos CHz to od (d) CH -ċ-CH2-ci alc. KOH CH |
12 |
| 859 | The synthesis of alkyl fluorides is best accomplish by ? A. free radical fluorination B. sandmeyer”s reaction c. Finkelstein reaction D. swarts reaction |
12 |
| 860 | In electrophilic aromatic substitution reactions of chlorobenzene, the ortho/para-directing ability of chlorine is due to its A. positive inductive effect ( (+I) ) B. negative inductive effect ( (-I) ) c. positive resonance effect ( (+R) ) D. negative resonance effect ( (-R) ) |
12 |
| 861 | ( boldsymbol{S}_{N} 1 ) reaction on optically active substrates mainly gives: A. retention in configuration B. inversion in configuration c. racemic product D. no product |
12 |
| 862 | ( boldsymbol{C H I}_{3} ) is the structure of: A. chloroform B. lodoform c. Both a and ( b ) D. None of these |
12 |
| 863 | 58. CH, CH, CH-CH, som bor > Products Ci tot Sec-butylchloride Which statement is incorrect? (a) One of the product exist as three stereoisomers (b) Two pair of diastereomers are obtained only (c) Only one meso stereoisomer is obtained (d) Two pair of enantiomers are obtained |
12 |
| 864 | 0 0 0 0 0 |
12 |
| 865 | The best method to prepare neopenty chloride is: A ( cdotleft(C H_{3}right)_{3} C C H_{2} O H stackrel{P C l_{5},}{longrightarrow} ) в. ( left(C H_{3}right)_{3} C C H_{2} O H stackrel{text {НС}, text {А}}{longrightarrow} ) C. ( left(C H_{3}right)_{3} C C H_{2} O H^{S_{o} C l_{2}, p y r i d i n e} ) D. ( left(C H_{3}right)_{3} C C H_{3} stackrel{C l_{2}, h nu Delta}{longrightarrow} ) |
12 |
| 866 | Answer in one word or one sentence: What is chirality? |
12 |
| 867 | . 38 Ethylene chloride and ethylidene chloride are isomers. onde and ethylidene chloride are isomers. Identify the correct statements. (a) Both the compounds form same product on treatme mpounds form same product on treatment with alcoholic KOH Both the compounds form same product on treatment with aq. NaOH (C) Both the compounds form same product on reduction (d) Both the compounds are optically active |
12 |
| 868 | Which of the following has least polar ( C-X ) bond? A. ( H_{3} C-C H=C H_{2}-C l ) в. ( H O-C H=C H_{2}-C l ) c. ( O_{2} N-C H=C H_{2}-C l ) D. ( H S-C H=C H_{2}-C l ) |
12 |
| 869 | Which of the following molecules exists as a pair of enantiomers? A. 2-Bromopropane B. 1-Bromo-3-methylbutane c. Cis-1,2-dichlorocyclobutane D. 2-cyclohexen-1-ol |
12 |
| 870 | The absolute configuration of is? A ( cdot(2 S, 3 R) ) в. ( (2 S, 3 S) ) c. ( (2 R, 3 R) ) D. ( (2 R, 3 S) ) |
12 |
| 871 | Carbylamine test is performed in the presence of ( K O H ) by heating a mixture of: A. an alkyl halide and a primary amine B. chloroform and silver powder c. an alkyl cyanide and a primary amine D. tri-halogenated methane and a primary amine |
12 |
| 872 | 280. Arrange the compounds in decreasing order of reactivity towards bromine: OM OMe bir oMedoMe towards D101o. – Me OH Me (II) (III) (IV) (a) III >II>IV>I (C) III > IV > II >I (b) II > IV>I> III (d) IV > II >I> III |
12 |
| 873 | Statement: In the above reaction, first compound in the product side is the major product. State whether the given statement is |
12 |
| 874 | Assertion (A) Nitration of chlorobenzene leads to the formation of m-nitrochlorobenzene. Reason (R) —NO, group is a m-directing group. A A |
12 |
| 875 | Ethyl chloride is not useful in preparing A. PVC B. TEL (Tetraethyllead) c. Grignard reagent D. Diethyl ether |
12 |
| 876 | Which of the following compounds can exist in enantiomeric forms? A. 3-methyl butanoic acid B. Cis-2-butene c. Isopropyl amine D. 1-methyl butanamine |
12 |
| 877 | Assertion: Pure ( C H C l_{3} ) does not give precipitate with ( A g N O_{3} ) solution. Reason: ( C H C l_{3} ) is covalent compound. A. Both Assertion and Reason are true and Reason is the correct explanation to Assertion B. Both Assertion and Reason are true and Reason is not the correct explanation to Assertion c. Assertion is true but Reason is false D. Assertion is false but Reason is true |
12 |
| 878 | Question 16. Arrange the compounds of each set in order of reactivity towards SN2 displacement : (i) 2-bromo-2-methylbutane, 1-bromopentane, 2-bromopentane (ii) 1-bromo-3-methylbutane, 2-bromo-2-methylbutane, 2-bromo-3-methylbutane (iii) 1-bromobutane, 1-bromo-2,2-dimethylpropane, 1-bromo-2-methylbutane, 1-bromo-3-methylbutane. |
12 |
| 879 | Which of the following reagent is used in the conversion of benzene diazonium chloride to chlorobenzene? A ( cdot C u_{2} C l_{2} ) в. ( C u C l_{2} ) c. ( F e C l_{2} ) D. ( F e C l_{3} ) |
12 |
| 880 | 0.86 Assertion (A) The boiling points of alkyl hali on (A) The boiling points of alkyl halides decrease in the order RI > RBr > RCI > RF so (R) The boiling points of alkyl chlorides, bromides and jodides are considerably higher than that of the hydrocarbon of comparable molecular mass. Reas |
12 |
| 881 | Name the Scientist who stated that matter can be converted into energy |
12 |
| 882 | What are the compounds represented by formula ( C_{2} H_{4} C l_{2} ? ) |
12 |
| 883 | Q40. The following reaction is classified as: CH CH I + KOH (aq) —CH,CH,OH + KI (a) electrophilic substitution (b) nucleophilic substitution (c) elimination (d) addition |
12 |
| 884 | 0.76 Discuss the nature of C X bond in the haloarenes. bol sit of belo |
12 |
| 885 | In Friedel craft alkylation of benzene with methyl chloride, the catalyst used is: A. Anhydrous ( A l C l_{3} ) B. Conc. sulphuric acid c. Dilute sulphuric acid D. Anhydrous ( Z n C l_{2} ) |
12 |
| 886 | Find the total number of secondary halogen in the given compound. |
12 |
| 887 | ( frac{d}{d} ) | 12 |
| 888 | 40. An isomer of C,H,, gives total six isomeric products on monochlorination. Calculate the percentage yield of the primary monochloride which is chiral. Consider the following relative reactivity of C-H bonds for chlorination. Degree of C-H 1° C- H2º C- H 3° C-H Relative reactivity for chlorination (RR) 3 (a) 26.8% (c) 30% (b) 25% (d) 50% |
12 |
| 889 | Which of the following will be readily soluble in water? ( A ) B. ( c ) D. |
12 |
| 890 | 17. 1-Butene is formed in reactions: CF3COH (b) M CF;CO;H (6) N on (6) M2 OH CHO |
12 |
| 891 | Which of the following are aprotic solvents?
This question has multiple correct options |
12 |
| 892 | Which one of the following is not correct order of boiling points of the alkyl/aryl halides? A. ( C H C l_{3}>C H_{2} C l_{2} ) B. ( C H_{3}left(C H_{2}right)_{3} C l>C H_{3}left(C H_{2}right)_{2} C l ) c. ( left(C H_{3}right)_{3} C C l>left(C H_{3}right)_{2} C H C H_{2} C l ) D. ( C H_{3}left(C H_{2}right)_{3} C l>C H_{3} C H_{2} C H C l C H_{3} ) |
12 |
| 893 | * 43 *2 Q13. Identify the reagents shown in bold in the following equations as nucleophiles or electrophiles (a) CH2COOH + HO- CH 200- + H,O (6) CH COCH, + CN (CH2), C(CN)(OH) (c) CH, + CHECO CH COCH, S . |
12 |
| 894 | Reaction of alkyl halide with metallic sodium in presence of dry ether solution is called: A. Friedel-crafts reaction B. Sandmeyers reaction c. Wurtz reaction D. Gabriels reaction |
12 |
| 895 | Q. 28 NO2 ON (| (iii) NO2 (a)(iii) < (ii) < (i) (c) (i) < (iii) < (ii) NO2 (b) (ii) < (iii) < (0) (d) (i) < (ii) < (iii) TL |
12 |
| 896 | Which of the carbon atoms present in the molecule given below are asymmetric? ( A cdot(i),(text { ii) }, ) (iii), (iv) B. (ii), (iii) ( c cdot(i),(i v) ) D. (i), (ii), (iii) |
12 |
| 897 | Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due to: This question has multiple correct options A. the formation of less stable carbonium ion B. resonance stabilisation C . longer carbon-halogen bond D. the inductive effect ( mathrm{E} cdot s p^{2}- ) hybridised carbon attached to the halogen |
12 |
| 898 | Rearrange the following compounds in the increasing order of their boiling points: ( boldsymbol{C H}_{3}-boldsymbol{C H O}, boldsymbol{C H}_{3}-boldsymbol{C H}_{2}- ) ( boldsymbol{O} boldsymbol{H}, boldsymbol{C} boldsymbol{H}_{3}-boldsymbol{C} boldsymbol{H}_{2}-boldsymbol{C} boldsymbol{H}_{3} ) |
12 |
| 899 | Question 2. Out of o and p-dichlorobenzene which one has the higher melting point and why? |
12 |
| 900 | correct major product formed? This question has multiple correct options ( A ) B ( c ) ( D ) |
12 |
| 901 | Question 9. Which compound in each of the following pairs will reach faster in S2 reaction with OHP (i) CHBr or CHI (ii) (CH3)3 CCI or CH,CI (i) Lesser the bond dissociation energy, faster is the reaction so find the molecule in which bond dissociation enthalpy is less. (ii) If both the groups are same, steric hindrance will be considered More the steric hindrance, lesser the reactivity. |
12 |
| 902 | 188. On passing vinyl acetylene into conc. HCl in the presence of cuprous and ammonium chlorides, the following is produced (a) Neoprene (b) Isoprene (c) Chloroprene (d) None of these |
12 |
| 903 | ( C H C l_{3} ) is stored in brown-coloured stoppered bottles filled up to the neck to prevent it from getting: A. Oxidized B. Reduced c. Hydrolysed D. Decomposed |
12 |
| 904 | Find out relation between I and II ? A. Enantiomers B. Diastereomers c. Homomers D. Structural isomers |
12 |
| 905 | ( boldsymbol{C C l}_{4}+mathbf{2}(boldsymbol{H}) stackrel{boldsymbol{F} e / text {Steam}}{longrightarrow} boldsymbol{A}+boldsymbol{H C l} ) ( boldsymbol{C H}_{3}-boldsymbol{C} equiv boldsymbol{C H}+boldsymbol{H}_{2} boldsymbol{O} frac{40 % boldsymbol{H}_{2} boldsymbol{S O}_{4}}{1 % boldsymbol{H g S O}_{4} / boldsymbol{6 0}^{circ} boldsymbol{C}} ) ( boldsymbol{B} ) The organic compound formed when ( boldsymbol{A} ) and ( B ) reacts together is and it is used as A. chloropicrin, insecticide B. chloretone, wargas c. chloretone, hypnotic D. chloropicrin, hypnotic |
12 |
| 906 | Consider the reaction of trans-2-butene with ( B r_{2} ) in ( C H_{2} C l_{2} . ) Which statement concerning this reaction is correct? A. The product is optically active because it possesses two chirality centers. B. The product is optically inactive because it is a racemic mixture of enantiomers. C. The product is optically inactive because it is meso. D. The product is optically inactive because it does not possess any chirality centers. |
12 |
| 907 | The chemical formula of tear gas is: A ( cdot C O C l_{2} ) в. ( C_{10} H_{5} ) Сl ( N_{2} ) ( c cdot C l_{2} ) D. ( P h C O C H_{2} C l ) |
12 |
| 908 | 0.66 A liquid with high boiling point decomposes on simple distillation but it can be steam distilled for its purification. Explain how is it possible ? |
12 |
| 909 | Chiral carbon is: A. carbon in which all four valencies are satisfied with four different atoms or group of atoms B. carbon in which at least two of their valency are satisfied with four different atoms or group of atoms C. carbon in which all four valences satisfied with same atoms D. none of these |
12 |
| 910 | The refrigerator cools your food and drink. The cooling is due to: A. expansion of ice B. the expansion of the refrigerant gas c. the work of the electric motor D. reaction of the refrigerant gas |
12 |
| 911 | A sample of chloroform which is used by doctors as an anaesthetic is generally tested by: A. ( A g N O_{3}(a q .) ) B. Fehling’s solution c. ( A g N O_{3}(a q .) ) after boiling with ( K O H ) D. Any of the above |
12 |
| 912 | 52. Which of the following give allylic substitution product? (a) ^ NBS/h, (b) ^_Seo> > Seo NBS/hy (C 1 Osa (d) S0₂Cl2 |
12 |
| 913 | The IUPAC name of the compound is: [ begin{array}{c} mathbf{B r}-mathbf{C H}_{2}-mathbf{C H}-mathbf{C O}-mathbf{C H}_{2}-mathbf{C H}_{2}-mathbf{C H}_{mathbf{3}} \ mathbf{C O N H}_{2} end{array} ] A. 2 – Bromo methyl- 3 – oxo hexanamide B. 1- Bromo – 2 – amido-3 – oxo – hexane c. 1 – Bromo – 2 – amido – n- propyl ketone D. 3 – Bromo – 2 -proponyl – propanamide |
12 |
| 914 | ( phi^{-} ) ( p ) ( dot{theta} ) ( phi ) |
12 |
| 915 | The reaction of toluene with ( C l_{2} ) in presence of ( F e, ) the product(s) formed is/are: A . o- and p-chlorotoluene B. benzyl chloride c. m-chlorotoluene D. only p-chlorotoluene |
12 |
| 916 | carried out? (i) Propene to propan-1-ol (ii) Ethanol to but-1-yne (iii) ( 1- ) Bromopropane to 2 -bromopropane (iv) Toluene to benzyl alcohol (v) Benzene to 4-bromonitrobenzene (vi) Benzyl alcohol to 2phenylethanoic acid (vii) Ethanol to propanenitrile (viii) Aniline to chlorobenzene (ix) 2 -Chlorobutane to ( 3,4- ) dimethylhexane (x) 2-Methyl-1propene to 2-chloro-2-methylpropane (xi) Ethyl chloride to propanoic acid (xii) But-1-ene to n-butyliodide (xiii) 2-Chloropropane to 1-propanol (xiv) Isopropyl alcohol to iodoform (xv) Chlorobenzene to p-nitrophenol (xvi) 2-Bromopropane to 1bromopropane (xvii) Chloroethane to butane (xviii) Benzene to diphenyl (xix) tert-Butyl bromide to isobuty| bromide ( (x x) ) Aniline to phenylisocyanide |
12 |
| 917 | Increasing the concentration of an electrophile in a typical ( S_{N^{2}} ) reaction by a factor of 3 and the concentration of the nucleophile by a factor of 3 will change the reaction rate to : A. increase by a factor of 6 B. increase by a factor of 9 c. decrease by a factor of 3 D. remain about the same |
12 |
| 918 | The IUPAC name of the compound is: A. 3-chloro-3-phenyl-1-propene B. 3-benzyl-3-chloro-1-propene c. 3-phenyl-3-chloro-1-propane D. 3-chloro propene benzen |
12 |
| 919 | Which of the following haloalkanes is most reactive? A. 1-chloropropane B. 1-bromopropane c. 2-chloropropane D. 2-bromopropane |
12 |
| 920 | The formula of tetrachloro methane is: A ( . C C l H_{3} ) в. ( C C l_{2} ) c. ( C H C l_{3} ) D. ( C C l ) |
12 |
| 921 | Assertion Aryl halides undergo electrophilic substitution less readily than benzene. Reason Aryl halide gives only meta product w.r.t. electrophilic substitution. |
12 |
| 922 | ( frac{partial}{phi} ) ( delta ) ( delta ) |
12 |
| 923 | Assertion Chlorobenzene on treatment with ( C l_{2} / A l C l_{3} ) gives mainly ( p ) dichlorobenzene. Reason Chlorine activate the ring towards an electrophile at ortho and para positions. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 924 | ( Y ) in the given reaction is: ( -mathrm{Br} frac{text { ether }}{mathrm{Mg}}>mathrm{X} frac{(mathrm{i}) mathrm{H}_{2} mathrm{O}}{(mathrm{ii}) mathrm{HCl}}>mathrm{Y}(text { main product }) ) A. hexane B. cyclohexane c. cyclohexylcyclohexane D. cyclohexylether |
12 |
| 925 | Q19. Write the structural formula of 4-chloro-2-pentene. | 12 |
| 926 | Which is the correct increasing order of boiling points of the following compounds? 1 – lodobutane, 1 – Bromobutane, 1 – Chlorobutane, Butane A. Butane <1 – Chlorobutane <1- Bromobutane <1 lodobutane B. 1 – lodobutane <1 – Bromobutane <1 – Chlorobutane Butane c. Butane ( <1 ) – lodobutane ( <1 ) – Bromobutane ( <1- ) Chlorobutane D. Butane <1 – Chlorobutane <1 – lodobutane <1 Bromobutane |
12 |
| 927 | Which one of the following can exist in optically active forms? A. Trans-1,3-Dichlorocyclohexane B. Cis-1,3-Dichlorocyclohexane C. Cis-1,4-Dichlorocyclohexane D. Cis-1,2-Dichlorocyclohexane |
12 |
| 928 | Only one particular optical isomer of amino acids are used in our body to make: A. protein B. lipids c. oxygen D. carbohydrates. |
12 |
| 929 | If chloroform is left open in air in the presence of sun rays, which of the following changes takes place? A. Explosion takes place. B. Poisonous gas phosgene is formed. c. Polymerization takes place. D. No reaction takes place |
12 |
| 930 | A ( 300 mathrm{mm} ) long tube containing ( 60 mathrm{cc} ) of sugar solution produces a rotation of ( 9^{circ} ) when placed in a polarimeter. If the specific rotation is ( 60^{circ} . ) Calculate the quantity of sugar contained in the solution. |
12 |
| 931 | The products of the following reactions is(are): ( mathbf{C}_{2} mathbf{H}_{5} mathbf{B} mathbf{r}+mathbf{2} mathbf{N} mathbf{a}+mathbf{C} mathbf{H}_{3} mathbf{B} mathbf{r} stackrel{d r y e t h e r}{rightarrow} ? ) A. ethane B. propane c. butane D. ethane, propane and butane |
12 |
| 932 | ( C-X ) bond is polar because: ( mathbf{A} cdot X ) is more electronegative than ( C ) B. ( X ) attracts electron cloud to itself c. ( X ) gains slight negative charge on it and ( C ) gains slight positive charge on it D. all of these |
12 |
| 933 | An alkane which can exhibit optical activity is: A. 3-methylhexane B. 3-methylpentane c. isopentane D. neopentane |
12 |
| 934 | 151. Which orbital of butadiene is involved in the following reaction with HBr? HBr >H (6) 88 8 (2) 308 |
12 |
| 935 | Q. 96 Some halogen containing compounds are useful compounds of this class are responsible for exposure of flora and fauna to more and more of UV light which causes destruction to a great extent. Name the class of these halocompounds. In your opinion, what should be done to minimise harmful effects of these compounds. o follow |
12 |
| 936 | Chloroform when treated with concentrated nitric acid yields: A. chloropicrin B. chloroprene c. nitro picrin D. nitro chloropicrin |
12 |
| 937 | The IUPAC name of Chloropicrin is: A. Trichloronitromethane B. 1, 1, 1-trichloro-2-methyl-2-propanol c. 3-hydroxybutanal D. 2, 2, 2-trichloroethanal |
12 |
| 938 | There is increase in boiling point of takes place for each carbon atom added to the chain. A ( cdot 10^{0} ) to ( 20^{0} ) B . ( 20^{0} ) to ( 30^{0} ) ( mathbf{c} cdot 30^{0} ) to ( 40^{0} ) D. ( 5^{0} ) to ( 10^{0} ) |
12 |
| 939 | When ethyl alcohol is heated with a paste of bleaching powder, we get an intermediate compound. The formula of that compound is: ( mathbf{A} cdot C_{2} H_{5} C l ) в. ( C C l_{3} C H O ) ( mathbf{c} cdot C H_{3} I ) D. ( C C l_{3} ) СОСН ( _{3} ) |
12 |
| 940 | Assertion Benzyl bromide when kept in acetone and ( H_{2} O ) produces benzyl alcohol. Reason The reaction follows ( S_{N} 2 ) mechanism. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason are correct |
12 |
| 941 | Hydrolysis of trichloro methane with aq KOH gives finally: A. methanol B. chloral c. acetylene D. potassium formate |
12 |
| 942 | Carbylamine test is performed in alcoholic ( K O H ) by heating a mixture of A. chloroform and silver powder B. trinalogenated methane and a primary amine c. an alkyl halide and a primary amine D. an alkyl cyanide and a primary amine |
12 |
| 943 | 0.8 Arrange the following compounds in increasing order of their boiling points. CH3 (i) CH-CH, Br (ii) CH,CH,CH,CH,Br “CH₃ CH3 (iii) HEC-C-CHg Br (a) (ii) < (i) < (iii) (c) (iii) < 0) < (ii) (b) (i) < (ii) < (iii) (d) (ii) < (ii) < (1) baratoare |
12 |
| 944 | For making distinction between 2 pentanone and 3-pentanone the reagent to be employed is : A ( cdot K_{2} C r_{2} O_{7} / H_{2} S O_{4} ) в. ( Z n-H g / H C l ) ( mathrm{c} cdot operatorname{Se} mathrm{O}_{2} ) D ( cdot I_{2} / N a O H ) |
12 |
| 945 | Which of the following statements are correct for the above reaction? This question has multiple correct options A. The product is a mixture of (figure) B. The product (II) is a cine-substitution product C. The reaction proceeds via benzene intermediate D. The reaction is ( A r S N ) (addition-elemination |
12 |
| 946 | Chloroform is kept in brown bottles because: A. It evaporates easily B. It reacts with ( C O_{2} ) of the air c. It easily oxidize to poisonous substance. D. It absorbs moisture |
12 |
| 947 | Chlorobenzene can be prepared by reacting benzene diazonium chloride with: A. ( H C l ) в. ( C u_{2} C l_{2} ) c. ( C l_{2} / A l C l_{3} ) D. ( H N O_{2} ) |
12 |
| 948 | Bleaching powder is needed in the manufacture of chloroform. A. True B. False |
12 |
| 949 | When phenol is treated with excess bromine water, it gives: A. m-Bromophenol B. o- and p-bromophenol c. 2,4 -Dibromophenol D. 2,4,6-Tribromophenol |
12 |
| 950 | Which of the following does not form Grignard reagent on reaction with ( M g ) in the presence of ether? A. chloroethane B. 1-chloropropane c. Bromobenzene D. All of them form Grignard reagent |
12 |
| 951 | ( boldsymbol{C l}-boldsymbol{C H}_{2}-dot{boldsymbol{C}}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}- ) ( boldsymbol{C H}_{3} ) ( C l+I^{-} frac{ }{D M F} ) product в. ( quad C l-C H_{2}-stackrel{C H_{3}}{C}-C H_{2}-C H_{2}-I ) c. ( quad ) снз [ H_{2} C=C text { – } C H_{2}-C H_{2}=C l ] D. ( quad C l C H_{2}-C_{I}^{C H_{3}}-C H_{2}=C H_{2} ) |
12 |
| 952 | Which of the following product predominates(Major) ine following raction? A. 3 -chlorotoluene B. 2-chlorotoluene c. 4 -chlorotoluene D. Both A and |
12 |
| 953 | When ethyl bromide is heated with silver nitrate the product obtained is: A. ethyl nitrite B. ethyl nitrate c. nitropropane D. none of the above |
12 |
| 954 | Which of the given pair of ( S N_{1} ) reaction would you expect to proceed faster? Explain your answer. |
12 |
| 955 | Arrange following according to boiling point ( boldsymbol{C}_{4} boldsymbol{H}_{10}, boldsymbol{C}_{3} boldsymbol{H}_{8}, boldsymbol{C}_{5} boldsymbol{H}_{12} ) |
12 |
| 956 | Benzyl chloride ( left(C_{6} H_{5} C H_{2} C lright) ) can be prepared from toluene by chlorination with? This question has multiple correct options ( A cdot S O_{2} C I_{2} ) в. ( operatorname{SOCI}_{2} ) c. ( C I_{2} ) D. ( N a O C I ) |
12 |
| 957 | The reaction, ( R C l+N a I stackrel{text { Dry acetone }}{longrightarrow} ) ( R-I+N a C l ) is known as: A. Wurtz reaction B. Fittig reaction c. wurtz – Fitting reaction D. Finkelstein’s reaction |
12 |
| 958 | Explain ( S N^{1} ) reaction with appropriate example. |
12 |
| 959 | Assertion Statement-I : boiling point of alkyl halide increases with increase in molecular weight. Because Reason Statement-II : boiling point of alkyl halides are in the order ( R I>R B r> ) ( boldsymbol{R} boldsymbol{C l}>boldsymbol{R} boldsymbol{F} ) A. (A) Statement-I is true, Statement-II is true Statement-II is correct explanation for Statement-I B. (B) Statement-I is true, Statement-II is true Statement-II is NOT a correct explanation for Statement-I. c. (c) Statement-I is true, Statement-II is false D. (D) Statement-I is false, Statement-II is true |
12 |
| 960 | Nature of ( C-X ) bond in haloarene is Non- Polar. A . True B. False |
12 |
| 961 | ( boldsymbol{C H}_{2}=boldsymbol{C H}_{2}+boldsymbol{B r}_{2} stackrel{N a C l}{longrightarrow} quad boldsymbol{P r o d u c t s} ) Which of the following product is not formed in the above reaction? ( mathbf{A} cdot B r C H_{2} C H_{2} B r ) в. ( C l C H_{2} C H_{2} C l ) c. ( B r C H_{2} C H_{2} C l ) D. All are formed |
12 |
| 962 | ( boldsymbol{S}_{N^{1}} ) reactivity of the following halides, (i) ( left(boldsymbol{C} boldsymbol{H}_{3}right)_{3} boldsymbol{C} boldsymbol{B r} ) (ii) ( left(C_{6} H_{5}right)_{2} C H B r ) (iii) ( left(C_{6} H_{5}right)_{2} Cleft(C H_{3}right) B r ) (iv) ( left(C H_{3}right)_{2} C H B r ) will be in the order: ( mathbf{A} cdot i v>i>i i>i i i ) в. ( i i>i> ) iii ( > ) iv ( mathbf{c} cdot i>i i i>i i>i v ) D. ( i i i>i i>i>i v ) |
12 |
| 963 | Which molecule is a meso compound? ( mathbf{A} cdot V I ) and ( I I ) B. ( I V ) and ( V ) c. ( I, I I ) and ( I I I ) D. none of these |
12 |
| 964 | Arrange these haloalkanes in correct order of density: A ( cdot C H_{3} I<C_{2} H_{5} IC_{2} H_{5} I>C_{3} H_{7} I ) c. ( C H_{3} IC_{3} H_{7} ) D. ( C H_{3} I>C_{2} H_{5} I<C_{3} H_{7} I ) |
12 |
| 965 | 2 8 The increasing order of reduction of alkyl halides with zinc and dilute HCl is (a) R -CI <R-I<R-Br (b) R-Cl< R-Br <R-I (c) R-I< R-Br <R-CI (d) R-Br <R-I<R-CI |
12 |
| 966 | Q Type your question_ ( A ) B ( mathbf{C} ) D. |
12 |
| 967 | СН, на vb 75. + Br® HdYOH CH2-Hº Brº will abstract which of the hydrogen most readily? (a) a (b) b (c) c (d) d |
12 |
| 968 | For the given pair of ( S_{N} 2 ) reaction, the first product occurs with larger rate constant. [ bigwedge_{mathrm{Br}}+mathrm{HO}^{-} longrightarrow sim_{mathrm{Y}} mathrm{Br}+mathrm{HO}^{-} rightarrow ] |
12 |
| 969 | Which substance is used to extinguish fire in substances like oil, fat and petrol? A. ( C H_{3} C l ) в. ( C H C l_{3} ) ( mathbf{c} cdot C H_{2} C l_{2} ) D. ( C C l_{4} ) |
12 |
| 970 | Fluorobenzene ( left(C_{6} H_{5} Fright) ) can be synthesized in the laboratory: A. By heating phenol with ( H F ) and ( K F ) B. From aniline by diazotization, followed by heating the diazonium salt with ( H B F_{4} ) c. By direct fluorination of benzene with ( F_{2} ) gas D. By reacting bromobenzene with ( N a F ) solution |
12 |
| 971 | Which of the following is gem-dihalide: ( A ) в. ( c ) D. |
12 |
| 972 | 225. Derive a series of reaction to convert benzene into meta-chlorobromobenzene. Select reagent and condition from following table listing them in the order of use. 1. Conc. H,SO, A 5. Mg in ether 6. PBr 2. C1, + FeCl, and heat 3. NaNO, + HCI, 0°C 4. H, Pt catalyst 7. H,PO 8. HNO, (Conc.) +9. Cu,Brą + HBr H2SO4 (Conc.) 10. (CH,CO), + Pyridine (a) 1 then 2 then 6 (c) 8 then 4 then 10 then 2 then 3 then 9 (b) 2 then 8 then 4 then 3 then 9 (d) 8 then 2 then 4 then 3 then 9 |
12 |
| 973 | IUPAC name of ( left(boldsymbol{C H}_{3}right)_{2} boldsymbol{C H}-boldsymbol{C H}_{2}- ) ( boldsymbol{C H}_{2} boldsymbol{B r} ) is: A. 1-Bromopentane B. 2-Methyl-4-bromobutane c. 1-Bromo-3-methylbutane D. 2-Methyl-3-bromobutane |
12 |
| 974 | Chloroform can be obtained from: A. methanal B. 2-propanal c. methanol D. 1-propanol |
12 |
| 975 | Correct order of rate of ( E A S ) (electrophilic aromatic substitution) is: А ( . c>b>a>d ) В . ( c>d>a>b ) ( c cdot a>b>c>d ) |
12 |
| 976 | ( boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{C O O A} boldsymbol{g}+boldsymbol{B r}_{2} stackrel{boldsymbol{C C l}_{4}}{longrightarrow} ) ( boldsymbol{X} stackrel{boldsymbol{a q} cdot boldsymbol{K O H}}{longrightarrow} boldsymbol{Y} stackrel{boldsymbol{r e d} boldsymbol{P}_{4} / boldsymbol{B} boldsymbol{r}_{2}}{longrightarrow} boldsymbol{Z} ) ( Z ) is: A ( cdot C H_{3} C H_{2} C H_{2} B r ) в. ( C H_{3} C H_{2} B r ) c. ( C H_{3} B r ) D. ( C H_{3} C H_{2} C H_{3} ) |
12 |
| 977 | 0 OH BrB NO2 It can be performed by using reagents: (1) Bry/FeBr? (II) HNOZ/H2SO4 (III) K,Cr,0,/H2SO4, A These reagents should be used in following order: (a) A II, I IB (b) A I, I, IIB (c) A I, I, IIB (d) A III, I>B |
12 |
| 978 | Question 18. p-dichlorobenzene has higher melting point and lower solubility than those of o-and m-isomers. Discuss. Symmetry of the molecule is related to its crystal lattice structure and hence, to its melting point and solubility. A highly symmetrical structure has a higher melting point. |
12 |
| 979 | H H3Ct y CH3 41. Bry/hv Product (major) HY H H Identify the major product. CHZ sco CH, (a) CH3 -C-CH2 – Br (b) CH3 -C-CH; H et Br . (C) CH, CH-CH,-Br (d) CH2 – CH – CH2 Br |
12 |
| 980 | Assertion ( I O_{3}^{-} ) is reduced to ( I^{+} ) but intermediate gives violet color in ( C C I_{4} ) (taken as medium). Reason ( I_{2} ) is formed as the intermediate A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct |
12 |
| 981 | 0.58 Which of the following compounds will have the my and why? lowing compounds will have the highest melting point сна CH3 CHE CH3 (II) CH (III) |
12 |
| 982 | 47. The reactivity of hydrogen atoms attached to carbon atom in the halogenation of an alkane has the order: (a) tertiary> primary > secondary (b) secondary> primary > tertiary (c) tertiary > secondary> primary (d) primary > secondary > tertiary |
12 |
| 983 | The compound ( Y ) is: A. 1,3 – dichloro benzene B. benzyl chloride ( mathrm{C} cdot 1,3,5- ) trichloro benzene D. mixture of 1,2 and 1,4 dichlorobenzene |
12 |
| 984 | Which of the following molecules has highest dipole moment? A ( . C H_{3} C l ) в. ( C H_{2} C l_{2} ) c. ( C H C l_{3} ) D. ( C C l_{4} ) |
12 |
| 985 | Which of the alkyl halide has minimum boiling point? A. ( C H_{3} F ) в. ( C H_{3} C l ) ( mathrm{c} cdot C H_{3} B r ) D. ( C H_{3} I ) |
12 |
| 986 | Match the following: | 12 |
| 987 | Complete the reaction: [ langlemathrm{Br}+mathrm{Mg} stackrel{mathrm{dry} text { ether }}{rightarrow} mathrm{A} stackrel{mathrm{H}_{2} mathrm{O}}{longrightarrow} mathrm{B} ] |
12 |
| 988 | 2-Pentanol can be converted to 2-ethoxy pentane by two paths. In path I, ( boldsymbol{H}^{oplus} ) is abstracted from 2-pentanol to form the nucleophile while in path II, ( boldsymbol{H}^{oplus} ) is abstracted from ethanol. What is true about the configuration at chiral ( C ) of 2 pentanol? A. Retained in both paths B. Retained in path I and Inverted in path I c. Inverted in path I and Retained in path। D. Inverted in both paths |
12 |
| 989 | Find out the number of dimerize products obtained by following reaction ( boldsymbol{H}_{3} boldsymbol{C}-boldsymbol{C l}+boldsymbol{H}_{3} boldsymbol{C}-boldsymbol{C H}_{2}-boldsymbol{C l}+ ) ( boldsymbol{H}_{3} boldsymbol{C}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{C l} frac{N boldsymbol{a}}{text {Dryether}} ) |
12 |
| 990 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C}left(boldsymbol{C H}_{3}right)(boldsymbol{C l})-boldsymbol{C H}_{3} ) is ( mathbf{a} ) alkyl chloride. A. primary B. secondary c. tertiary D. none of these |
12 |
| 991 | How many isomeric vicinal-dihalides are possible for the compound having molecular formula ( C_{3} H_{6} C l_{2} ? ) A B. 2 ( c cdot 3 ) D. 4 |
12 |
| 992 | Q. 72 How will you obtain monobromobenzene from aniline? | 12 |
| 993 | 57. In which of the following cases, the major product has been correctly shown? Of Br BIODATA) Me COⓇK (b) Br Borovo so doid. BI Eto EtOHY DO CH5OH (d) -Br- Br CH2OH, slot |
12 |
| 994 | Alcohol Alkyl chloride Q. 64 Which of the following compounds would und of the following compounds would undergo SN 1 reaction faster and why? CHCI CHCI (B) |
12 |
| 995 | dentify correct reactivity order for ( boldsymbol{S}_{N} mathbf{2} ) reaction. (ii) A . i > iì ii i B. ii > jii > D. None of these |
12 |
| 996 | In which of the following reactions, products are not correctly matched in: A ( cdot R M g X+C O_{2} frac{(i) C O_{2}}{(i) H oplus} ) Carboxylic acio B . ( R M g X+C_{2} H_{5} O H rightarrow ) Alkane c. ( R M g X+C H_{3} C H_{2} C l rightarrow ) Alkene D. [ operatorname{RMgX}+text { cl } widehat{operatorname{lth} e r} ] |
12 |
| 997 | Which of the following reagents will best convert nitrobenzene into ( 2,4,6- ) trichlorobromobenzene? A. ( operatorname{SnCl}_{2} / mathrm{HCl}, mathrm{Cl}_{2}(a q), mathrm{NaNO}_{2} / mathrm{HCl}-0^{circ} mathrm{C} ; mathrm{CuBr} ) B . ( C l_{2} / A l C l_{3}, S n C l_{2} / H C l, N a N O_{2} / H C l-0^{o} C ; C u B r ) c. ( operatorname{SnCl}_{2} / mathrm{HCl}, mathrm{Br}_{2}-mathrm{H}_{2} mathrm{O}, mathrm{NaNO}_{2} / mathrm{HCl}-0^{circ} mathrm{C} ; mathrm{CuCl} ) D. ( operatorname{SnCl}_{2} / mathrm{HCl}, mathrm{NaNO}_{2} / mathrm{HCl}-0^{circ} mathrm{C}, mathrm{H}_{2} mathrm{O}, mathrm{Cl}_{2}(mathrm{aq}) ; mathrm{HB} ) |
12 |
| 998 | Which chloroderivative of benzene among the following would undergo- hydrolysis most readily with aq. NaOH to furnish the correspoinding hydroxy derivative? ( A ) B. ( c ) ( D ) |
12 |
| 999 | Assertion carbon tetraiodide ( left(C I_{4}right) ) is a solid whereas carbon tetrafluoride ( left(C F_{4}right) ) is a gas. Reason This is due to the London dispersion to dipole-dipole interaction because of the increased polarity. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 1000 | Q.14 Ethylidene chloride is a/an ………. (a) vic-dihalide (b) gem-dihalide (c) allylic halide (d) vinylic halide orhon toms |
12 |
| 1001 | How many total number of optically active products are formed? The given compound is (S)-2-chloro-2- methylbutane |
12 |
| 1002 | Which of the following is called Westron? A ( . C H_{3} C l ) в. ( C H C l_{3} ) c. ( C H C l_{2} . C H C l_{2} ) D. ( C C l_{2}=C H C l ) |
12 |
| 1003 | ( frac{1}{88} ) 48 86 6.8 |
12 |
| 1004 | Other name of alkyl halide is : A. Monohalo-alkanes B. Dihalo-alkanes C. Trihalo-alkanes D. None of these |
12 |
| 1005 | 15. Which of the following substrates give alkene only by heating? (a) CH3 – CH2 – 0-C-CH; Bra (b) CH3 – CH2 – CH-CH CH3 – CH2 – CH – CH3 NO Me 0 Me |
12 |
| 1006 | Addition of ( B H_{3} ) followed by ( H_{2} O_{2} ) to trans – 2 – butene would give you a product which is: A . achiral B. racemic c. meso D. optically active |
12 |
| 1007 | Write the chemical formula of Chloroform. |
12 |
| 1008 | ( sigma ) ( sigma ) ( varphi ) |
12 |
| 1009 | The reaction ( boldsymbol{C}_{mathbf{6}} boldsymbol{H}_{mathbf{5}} boldsymbol{I}+mathbf{2} boldsymbol{N} boldsymbol{a}+ ) ( boldsymbol{C H}_{3} boldsymbol{I} rightarrow boldsymbol{C}_{6} boldsymbol{H}_{5} boldsymbol{C H}_{3}+mathbf{2} boldsymbol{N} boldsymbol{a} boldsymbol{I} ) is called: A. Wurtz reaction B. Fittig reaction c. Wurtz – Fittig reaction D. Sandmeyer reaction |
12 |
| 1010 | CH.CHCH,Br2. H,0 ) 176. BrCH,CHCH,CH,CHCH,Br 1 excess NaNH,NH, Br. Br (a) H-C=C-CH, CH,C=C-H (b) H-C=C—C=C-H (c) H-C=C—CH-C=C-H (d) HC=C-HUI33 MOGO |
12 |
| 1011 | Order of increasing acidic strength ( (|) ) A ( . I>I I>I I I ) B. ( I I>I I I>I ) c. ( I>I I I>I I ) D. ( I I I>I I>I ) |
12 |
| 1012 | Name the following reaction. ( boldsymbol{H}_{3} boldsymbol{C}-boldsymbol{B r}+boldsymbol{A} boldsymbol{g} boldsymbol{F} rightarrow boldsymbol{H}_{3} boldsymbol{C}-boldsymbol{F}+ ) ( A g B r ) |
12 |
| 1013 | Pure methane can be produced by: A. Wurtz reaction c. soda lime decarboxylation D. reduction with ( H_{2} ) |
12 |
| 1014 | Which of the following alkyl halides undergoes ( S_{N} 1 ) reaction the fastest? A. methyl chloride B. ethyl chloride c. isobutyl chloride D. tert-butyl chloride |
12 |
| 1015 | Which of the following order is correct for the decreasing reactivity of ring monobromination of the following compounds? A ( I>I I>I I I>I V ) ( V ) B. ( I I>I I I>I V>I ) c. ( I>I I I>I I>I V ) D. ( I I I>I>I I>I V ) |
12 |
| 1016 | Which of the following compounds is optically active? A. ( 1- ) Bromobutane B. 2- Bromobutane c. 1 -Bromo-2-methylpropane D. 2-Bromo-2-methylpropane |
12 |
| 1017 | Increasing order of reactivity of the following compounds for ( boldsymbol{S}_{N} mathbf{1} ) substitution is: ( A ) (B) ( mathbf{C} ) ( mathbf{D} ) A ( cdot(B)<(C)<(D)<(A) ) В. ( (A)<(B)<(D)<(C) ) C. ( (B)<(A)<(D)<(C) ) D. ( (B)<(C)<(A)<(D) ) |
12 |
| 1018 | 19. Write correct reactivity order towards photochemical chlorination. (X) CH-CH2CH2CH2CH2 CH, (Y) CH3-CH-CH2-CH D -ID CH, (Z) CH3-CH CH; (W) CH, CH2 (a) X>Y>Z>W (c) X>Z>W>Y (b) Y>X>Z>W (d) Z>W>Y>X |
12 |
| 1019 | What is the correct structure of ( 1,2- ) Dichloropropane? A. ( C H_{3}-C H C l-C H C l_{2} ) в. ( C H_{3}-C H C l-C H_{2} C l ) ( mathrm{c} cdot C H_{3}-C C l_{2}-C H_{3} ) D. ( C H_{3}-C H_{2}-C H C l_{2} ) |
12 |
| 1020 | ( 1- )phenyl( -2- )chloropropane on treating with alc. ( K O H ) gives mainly: A. 1-phenylpropene B. 2-phenylpropene c. 1 -phenylpropane-2-ol D. 1-phenylpropan-1-ol |
12 |
| 1021 | ( boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{C H}_{2}-boldsymbol{O H} frac{boldsymbol{H C l}}{boldsymbol{Z n C l}_{2}} ) Product Find the correct statement. This question has multiple correct options A. Reaction is ( S_{N} 1 ), if higher concentration of ( Z n C l_{2} ) is used B. Reaction is ( S_{N} 2 ), if higher concentration of ( Z n C l_{2} ) is used c. Rearranged the product if higher concentration of ( Z n C l_{2} ) is used. D. All of the above |
12 |
| 1022 | Complete and rewrite the balanced chemical equation. Chlorobenzene ( _{43.4, text { pressure }}^{N a C N+C u C N} ? ) |
12 |
| 1023 | OCH (CH3)C = CH2/H® → Product, identify the product. OCH ОСН, C(CH3)3 C(CH3)3 CH3 CH; QCH2-CH(CH3)2 CH3 0-C-CH CH3 CH, |
12 |
| 1024 | 0.87 Assertion (A) KCN reacts with methyl chloride to give methyl Reason (R) CN- is an ambident nucleophile. Ane (d) Assartior ototomont |
12 |
| 1025 | Assertion Dipole moment of ( C-C l ) bond is more than that of ( boldsymbol{C}-boldsymbol{F} ) Reason Size of ( boldsymbol{F} ) is very small. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion c. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect |
12 |
| 1026 | Chloretone is: A. ( C C l_{3} N O_{2} ) в. ( C H_{3} C O C H_{2} C H C l_{2} ) c. ( left(C H_{3}right)_{2} ) СОСНС( l_{2} ) D ( cdotleft(C H_{3}right)_{2} C(O H) C C l_{3} ) |
12 |
| 1027 | Choose the correct order of reactivity toward nucleophilic substitution: ( (mathbf{I}) ) ( (mathbf{I I}) ) ( (mathbf{I I I}) ) ( mathbf{A} cdot(1)<(|)<(| 1) ) B. ( (1)<(111)<(11) ) ( mathbf{C} cdot(| I)<(|)<(1) ) D. ( (11)<(111)<(1) ) |
12 |
| 1028 | Complete the following reaction ( boldsymbol{C}_{2} boldsymbol{H}_{5} boldsymbol{O} boldsymbol{H}+boldsymbol{P} boldsymbol{C l}_{5} rightarrow ) |
12 |
| 1029 | Starting from aniline how will you prepare benzene diazonium chloride and chlorobenzene from the later? Explain giving chemical reactions involved. |
12 |
| 1030 | Which among the following is the correct order of melting point? ( A ) B. ( c ) ( D ) |
12 |
| 1031 | (II) ( boldsymbol{C} boldsymbol{H}_{3} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{C} boldsymbol{H}_{2} boldsymbol{B} boldsymbol{r} ) Arrange the following compounds in increasing order of their boiling points: ( (mathbf{I}) ) (III) ( A cdot(mid I)<(1)<(| 1) ) B. (I) <(II) <(III) ( c cdot(| I)<(1)<(11) ) D. (III) <(II) < (I) |
12 |
| 1032 | Which of the following is obtained in carbylamine reaction? A. ( C_{6} H_{5} N H_{2} ) в. ( C O C l_{2} ) ( mathbf{c} cdot C_{6} H_{5} C N ) D. ( C_{6} H_{5} N C ) |
12 |
| 1033 | Write the chemical formula of 2 -chloro- 2-methylpropane. |
12 |
| 1034 | Following reaction, ( left(boldsymbol{C H}_{3}right)_{3} boldsymbol{C B r}+boldsymbol{H}_{2} boldsymbol{O} longrightarrow ) ( left(C H_{3}right)_{3} C O H+H B r ) is an example of A. elimination rection B. free radical substitution c. nucleophilic substitution D. electrophilic substitution |
12 |
| 1035 | Q. 27 (0) (ii) -CH₃ (iii) 1 – CH₂ (a) (i) < (ii) < (iii) (c) (iii) < (ii) < 0) (b) (i) < (iii) < (ii) (d) (ii) < (iii) < (i) |
12 |
| 1036 | Q. 2 Arrange the halogens F2, Cl, Br, I2, in order of their increasing reactivity with alkanes. (a) 1, <Bra <Cl, <F (b) Brą <Cl, <F4<h2 (C) F, <Cl2 <Brz <I2 (d) Br2 <Cl2 <F2 |
12 |
| 1037 | 29. (CH2)2 CMgCl on reaction with D20 produces: (a) (CH3)2 CD (b) (CH3)3 COD (C) (CD3), CD (d) (CD3), COD |
12 |
| 1038 | 58. Which of the following compounds will give E, reaction? Br Br -C-CH-CH, (b) Ph-CH-CH, СІ (C) HC=CH-CH-CH3 (d) |
12 |
| 1039 | ( C_{6} H_{5} C l frac{N a O H(a q .)}{625 K, 300 a t m} ) The product can be: A. benzal B. sodium benzoate C . benzol D. sodium phenate |
12 |
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