Carbon And Its Compounds Questions

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Carbon And Its Compounds Questions

List of carbon and its compounds Questions

Question NoQuestionsClass
1Which is/are the characteristic(s) of
Diamond?
A. Opaque
B. Hardness
c. Both ( A ) and ( B )
D. conductor of electricity
10
2Carbon-12 atom has:
A. 6 electrons, 6 protons, 6 neutrons
B. 6 electrons, 12 protons, 6 neutrons
C .12 electrons, 6 protons, 6 neutrons
D. 18 electrons, 6 protons, 6 neutrons
10
3Which of the following reagent reacts with ethanoic acid to liberate hydrogen
gas?
A . Na a
B. zn
c. Both A and B
D. ç
10
4The most common fullerene is ( C_{60} .60 )
C-atoms are arranged in
pentagons and hexagons.
( mathbf{A} cdot 12,20 )
B. 16,26
c. 12,40
D. 16,40
10
545. Combustion of a candle is a/
an
(1) photochemical reaction
(2) physical change
(3) endothermic reaction
(4) exothermic reaction
10
6Crystalline form of carbon having 60 carbon atoms joined together is called:
A. polymer
B. buckminster fullerene
c. coal
D. diamond
10
7Which of the following product(s) is/are obtained during the reaction of ethanoic acid with chlorine?
A. Monochloroacetic acid
B. Dichloroacetic acid
c. Trichloroacetic acid
D. All of the above
10
8Complete combustion of alkene require sufficient :
A. oxygen
B. hydrogen
c. nitrogen
D. sulphur
10
9Assertion
Carbon and its compounds used as fuels for most applications.
Reason
When carbon is heated in presence of excess of air or oxygen, it forms carbon dioxide. During its formation, a large amount of heat and light are released.
Further, once ignited, carbon and its
compounds keep on burning without needing additional heat energy.
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
10
10Graphite is used in making electrodes because :
A. It has high melting point
B. It a soft and slippery
c. It is a good conductor of electricity
D. none of these
10
11Assertion
Acetic acid is a colourless liquid that when undiluted is called glacial acetic
acid.
Reason
Acetic acid has a distinctive sour taste
and pungent smell
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
10
12Which one of the following is not a property of carbon?
A. It exhibits catenation
B. It forms multiple bonds
c. Its melting points and boiling points are very high
D. It is a semi-metal
10
13How many double covalent bonds can a single carbon atom form at a time?
( mathbf{A} cdot mathbf{1} )
B. 2
( c cdot 3 )
( D )
10
14A compound ( X ) is obtained by the
reaction of alkaline ( boldsymbol{K} boldsymbol{M} boldsymbol{n} boldsymbol{O}_{4} ) with
another compound ( Y ) followed by
acidification. Compound ( X ) also reacts with compound ( Y ) in presence of few
drops of ( H_{2} S O_{4} ) to form a sweet
smelling compound ( Z ). The compound
( X, Y ) and ( Z ) are respectively:
A. ethanol, ethene, ethanoic acid
B. ethanoic acid, ethanol, ethylethanoate
c. ethanoic acid, ethanal, ethene
D. ethanol, ethanoic acid, sodium ethanoate
10
15Which method is used to get pure
ethanol?
A. Membrane technology
B. Esterification
c. Fermentation
D. None of these
10
16Octane burns in air is
A. Decomposition
B. Synthesis
c. combustion
D. single replacement
E . Double replacement
10
17Vinegar is a:
A. ( 5-8 % ) solution of acetic acid in water
B. 25-30% solution of acetic acid in water
C. ( 40-45 % ) solution of acetic acid in water
D. ( 45-50 % ) solution of acetic acid in water
10
18Acetic acid is:
A. Methanoic acid
B. Ethanoic acid
C. Propanoic acid
D. None of these
10
19Sodium or potassium salts of higher fatty acids are termed as:
A . salt
B. base
c. acid
D. soap
10
20Which nitrogen is maximum basic:
( A )
B.
( c )
D. All are equally basic
10
21Which of the following can conduct electricity in the solid state?
A. sucrose, ( C_{12} H_{22} O_{11}(s) )
B. Graphite, C(s)
C. Sodium hydroxide, NaOH(s)
D. Iron(III) chloride, ( F e C l^{3}(s) )
E . lodine, ( I_{2}(s) )
10
22Detergents are more efficient than soaps in cleaning, yet you have to limit the use of detergents because:
A. they are costly
B. they are not ecofriendly
c. their production cost is high
D. they produce scum in hard water
10
23If water contains dissolved calcium
hydrogencarbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes?
10
24What is salting out of soap?
A. Formation of salt
B. Formation of acids in aqueous medium
C. Melting if soap
D. Precipitation of soap in solid form
10
25Density of graphite is:
A ( .0 .5 g / c m^{3} )
B. ( 2.266 g / c m^{3} )
( mathbf{c} cdot 1.08 g / mathrm{cm}^{3} )
D. none of the above
10
26The following characteristics of a substance are given. What is the name of this substance?
(i) It is used as an abrasive for cutting glass.
(ii) It is used as a tip of deep boring drills.
(iii) It is used for making dies for
drawing wires.
(iv) It is used in generating laser beams in electronics.
A. Diamond
B. Buckminister fullerene
c. Lampblack
D. Graphite
10
27In the presence of concentrated
sulphuric acid ( left(boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4}right), ) acetic acid
reacts with ethyl alcohol to produce :
A. aldehyde
B. alcohol
( c . ) ester
D. carboxylic acid
10
28In the Earth’s crust, Carbon is found in
the form of
A. carbonates
B. hydrogen carbonates
c. petroleum
D. All of the above
10
29In which of the given pairs the two compounds are allotropes of the same
element?
( mathbf{A} cdot B r_{2} ) and ( H g )
B. ( C l_{2} ) and ( F_{2} )
C. ( N H_{4}^{+} ) and ( H_{3} O^{+} )
D. Fe and ( C O )
E. Diamond and graphite
10
30Lauryl alcohol on treatment with
( H_{2} S O_{4} ) followed by neutralisation forms a product which is:
A. cationic detergent
B. anionic detergent
c. neutral detergent
D. antidepressant
10
31How can we get compound X back from
Y? Name the process.
A. Saponification
B. Esterification
c. Carbonification
D. Hydrogenation
10
32Which chemical substance is emitted
in car exhaust and is a cause of acid
rain?
A. Nitrogen oxides
B. Leadd
c. Carbon dioxide
D. DDT
E. Nitrates
10
3397. Vegetable oil is mainly used for
(1) eating (2) cooking
(3) frying (4) lubricating
10
34Assertion
Liquefaction of acetic acid leading to formation of glacial acetic acid.
Reason
Vinegar is roughly ( 3 %-5 % ) acetic acid by volume, making acetic acid the main component of vinegar apart from 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. Both Assertion and Reason are incorrect
10
35During decarboxylation of ethanoic acid
with soda lime ( (N a O H+C a O), C O_{2} )
is removed as:
A. ( C O_{2} )
в. ( C O )
c. ( N a_{2} C O_{3} )
D. ( C a C O_{3} )
10
36( N a O H+C H_{3} C O O H longrightarrow )
( C H_{3} C O O N a+H_{2} O )
This reaction is called:
A. oxidation reaction
B. hydrogention reaction
c. neutralisation reaction
D. addition reaction
10
37Assertion
Carbon is nonmetal.
Reason
Carbon atoms can bond with each other.
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
10
38Explain why carbon generally forms compounds by covalent bonds.10
39Lower is the critical micelle
concentration of surfactant, ( ldots ) is the
detergency
1. lower
2. higher
3. indeterminate
4. none of the above
Fill in the blank with the correct answer
number.
10
40Which of the following statements is/are incorrect for diamond?
(a) The refractive index of diamond is
highest among solids.
(b) Diamond is hard because all the
valence electrons of each carbon atom
are involved in bond formation.
(c) Diamond is thermodynamically more stable than graphite.
(d) One carat of diamond represents
its weight.
A. All are correct
B. a, b and c
c. a and b
D. conly
10
41Glycerol is added to soap. It functions:
( A ). as a filler
B. to increase lathering
c. to prevent rapid drying
D. to make soap granules
10
42The most stable fullerene is :
A . ( C_{6} )
в. ( C_{7} )
c. ( C_{100} )
D. ( C_{9} )
10
43Reagents used for oxidation of carbon
compounds are:
A . acidified ( K_{2} C r_{2} O_{7} )
B. alkaline ( K M n O_{4} )
c. both ( A ) and ( B )
D. none of these
10
44The IUPAC name of the given compound
is:
A. 2,4 -butanedione
B. ethoxy ethanone
C. ethanoic diketone
D. acetic anhydride
10
45Carbon is less reactive than ( O_{2}, C l_{2} ) etc.
because:
A. it is a non-metal having low valency
B. the covalent bonds between various carbon atoms are very strong
c. it is black
D. none of the above
10
46What is the action of the following reagent on ethanoic acid?
( P C l_{3}, ) heat
10
47Proof is defined as
percentage by volume of alcohol in ethanol-water mixture.
( A ). twice
B. thrice
c. half
D. four times
10
48is the crystalline allotrope of carbon
A. coal
B. Coke
c. Diamond
D. Graphite
10
49Crystalline fullerene has properties.
A. semiconducting
B. insulating
c. both ( A ) and ( B )
D. none of these
10
50Name the process for ethanol to ethene
conversion and reactants used.
A. hydrogenation of ethanol in the presence of concentrated ( H_{2} S O_{4} )
B. dehydration of ethanol in the presence of concentrated ( H_{2} S O_{4} )
C. oxidation of ethanol in the presence of concentrated
( H_{2} S O_{4} )
D. reduction of ethanol in the presence of concentrated ( H_{2} S O_{4} )
10
51Complete combustion of hydrocarbon produces:
( A cdot C O+H_{2} O )
в. ( C O+H_{2} )
c. ( C O_{2}+H )
D. ( C O_{2}+H_{2} O )
10
52The minimum number of carbon atoms
in an alkane having four primary carbon atoms are:
A .4
B. 8
( c .5 )
D. 6
10
53Give the balance equation for the following laboratory preparation:
Ethane from sodium propionate
A ( cdot C H_{3} C H_{2} C O O N a+N a O H rightarrow C_{2} H_{6}+N a_{2} C O_{3} )
в. ( C H_{3} C H_{2} C O O N a+2 N a O H rightarrow C_{2} H_{4}+N a_{2} C O_{3} )
c. ( C H_{3} C H_{2} ) COONa ( + ) NaOH ( rightarrow C_{2} H_{4}+N a_{2} C O_{3} )
D. ( C H_{3} C H_{2} C O O N a+2 N a O H rightarrow 2 C H_{4}+N a_{2} C O_{3} )
10
54Carbon forms four covalent bonds by sharing its four valence electrons with univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of :
A. helium
B. neon
c. argon
D. krypton
10
55Which of the following bonds has maximum bond length?
A . C-O
B. C-H
c. ( c-c )
D. C-N
10
56Diamond and graphite are the covalent compounds of carbon element (C).
A. True
B. False
10
57Name the following:
Distinctive reaction that takes place
when ethanol is treated with acetic
acid.
10
58What are the following substances? Give one example of each one of them.
(i) Tranquilizers
(ii) Food preservatives
(iii) Synthetic detergents
10
59Which of the following allotropes of carbon is isomorphous with crystalline silicon?
A. coke
B. Diamond
c. Graphite
D. coal
10
60Explain the given reactions with the examples. Oxidation reaction:
A ( cdot C_{2} H_{5} O H stackrel{A l k . K M n O_{4}}{longrightarrow} C H_{2} O H C O O H )
в. ( C_{2} H_{5} ) ОН ( frac{text {Аlк.КМп} O_{4}}{longrightarrow} C H_{3} C H_{3} )
c. ( C_{2} H_{5} O H frac{A l k . K M n O_{4}}{longrightarrow} C H_{3} C H_{2} O H )
D. ( C_{2} H_{5} O H frac{A l k . K M n O_{4}}{longrightarrow} C H_{3} C O O H )
10
61The number of primary, secondary and tertiary amines possible with molecular
formula ( C_{3} H_{9} N ) is :
( A cdot 1,2,2 )
B. 1, 2,
c. ( 2,1, )
D. 3, 0,
10
62Diamond is the hardest allotrope of
carbon. Give reason for its hardness??
10
63Why is soap referred as a salt?
A. They are long chain of fatty acids
B. Made up of various salts
C. Gives salt on acting with water
D. None of above
10
64What is called as ‘black gold’?
A. Hydrocarbons
в. coal
c. Petroleum
D. Ether
10
65Which is the decreasing order of
stability?
(i) ( boldsymbol{C H}_{3}-boldsymbol{C H}-boldsymbol{C H}_{3} )
(ii) ( boldsymbol{C H}_{3}-boldsymbol{C H}-boldsymbol{O}-boldsymbol{C H}_{3} )
(iii) ( boldsymbol{C H}_{3}-boldsymbol{C H}-boldsymbol{C O}-boldsymbol{C H}_{3} )
( A . ) (i) ( < ) (ii) (i)> (iii)
( c cdot(text { iii) }>(text { ii) }>(i) )
D. (ii) > (iii) > (i)
10
66Which of the following substances are crystalline allotrope of carbon?
(i) Diamond (ii) Charcoal (iii) Graphite
(iv) Lamp black (v) Coke (vi) Fullerene
A. (i) to (vi) all
B. (i), (ii) & (iv)
( c . ) (i), (iii) & (vi)
D. (iv), (ii), (v)
10
67LPG has a lower energy density than either petrol or fuel-oil, so the equivalent ( _{text {一一一一一一 }} ) is higher.
A. fuel-consumption
B. fuel-absorption
c. fuel density
D. fuel capacity
10
68Which phenomenon is/are observed during washing of clothes by detergents? This question has multiple correct options
A. Micelle formation
B. Adsorption
c. Emulsification
D. Foaming
10
691.
The percentage of carbon in anthracite is 60%.
Rotol
i
a
.11.
1.1-
1__11
10
70Buckminster fullerene is the allotropic
form of:
A. nitrogen
B. carbon
c. sulphur
D. iodine
10
71Which of the following statement is
false?
A. Ethanoic acid is also called glacial acetic acid
B. In comparison of mineral acids carboxylic acids are weak acids
C. In comparison of mineral acids carboxylic acids are strong acids
D. Pure ethanoic acid often freeze in cold climates
10
72Carbon has ( _{text {一一一一一一一一一一 }} ) unpaired electrons in its outermost shell.
A .2
B. 3
( c cdot 5 )
( D )
10
73Graphite differs from diamond because graphite is:
This question has multiple correct options
A. greyish black in colour and bad conductor of electricity
B. slippery to touch and good conductor of electricity
c. greyish black in colour and bad conductor of heat
D. slippery to touch and good conductor of heat
10
74Benzene when heated in air burns with
and produces ( C O_{2} ) and
( boldsymbol{H}_{2} boldsymbol{O} )
A. sooty flame
B. non-sooty flame
c. light color flame
D. none of these
10
75What happens when ethanol is dissolved in water?
A. Absorption of heat and decrease in volume
B. Emission of heat and decrease in volume
c. Absorption of heat and increase in volume
D. Emission of heat and increase in volume
10
76The organic acid present in vinegar is :
A. methanoic acid
B. ethanoic acid
c. propanoic acid
D. none of these
10
77An allotropic form of carbon used for cutting and drilling is which of the following?
A. charcoal
B. bone charcoal
c. graphite
D. diamond
10
78Which of the following elements shows allotropy?
( A cdot ) Mg
B. cs
( c cdot s n )
D. zn
10
79Write a balanced chemical equation for each of the following:
(i) Burning of ethane in plentiful supply of air.
(ii) Action of water on Calcium carbide.
(iii) Heating of Ethanol at ( 170^{circ} mathrm{C} ) in the
presence of conc. Sulphuric acid.
10
80Micelles are used in
A. detergents
B. petroleum recovery
C. magnetic separation
D. all of these
10
81Name the following:
Reaction when an alkyl halide is treated
with alcoholic potassium hydroxide.
10
82When most fuels burn, the products include carbon dioxide and X. What is
X?
A. Hydrocarbons
B. Hydrogen
c. water
D. Hydroxide
E. Hydrogen peroxide
10
83The chlorination of methane is an
example of :
A. Addition
B. Elimination
c. substitution
D. Chain reaction
10
84Graphite is a conductor of
electricity whereas diamond is a
conductor of electricity.
A. bad, bad
B. good, bad
c. bad, good
D. good, goodd
10
85Which group elements are called
carbon family?
10
86Which symbol is used for the element
carbon?
A. ( C )
в. ( C a )
( c cdot c n )
D. ( C o )
ह. ( C u )
10
87Which of the following is sec-butyl alcohol?
A. ( C H_{3} C H_{2} C H_{2} C H_{2} O H )
в. ( C H_{3} C H(O H) C H_{2} C H_{3} )
c. ( left(C H_{3}right)_{2} C H C H_{2} O H )
D. ( left(C H_{3}right)_{3} C C H_{2} O H )
10
88The carbon atoms in diamond are
bonded to each other by:
A. ionic bond
B. coordinate bond
c. hydrogen bonds
D. covalent bonds
10
89There is no scum formation when hard
water is being used. The washing
powder can be:
A. ( C_{17} H_{35} ) COONa
B.
( c . ) both ( A ) and ( B )
D. none of the above
10
90An organic compound ‘A’ produces a gas with brisk effervescence when
sodium bicarbonate is added to it. The
compound ‘A’ contains same number of carbons as in ethane. The compound ‘A’ reacts with ethanol to form a sweet
smelling compound ‘C’ in presence
of conc. ( H_{2} S O_{4} . A ) and ( C ) respectively are
A. ethanoic acid and ethyl ethanoate
B. methanoic acid and ethyl methanoate
c. ethanoic acid and sodium ethanoate
D. methanoic acid and sodium methanoate
10
91The atomic number of carbon is :
A. 5
B. 6
( c cdot 12 )
D. 14
10
92Why are most carbon compounds poor conductors of electricity? Write the name and structure of a saturated
compound in which the carbon atoms
are arranged in a ring. Give the number of single bonds present in this
compound.
10
93Homologous series
is
A. A series of compounds in which the same functional group substitutes for hydrogen in a carbon chain
B. A series of compounds in which different functional group substitutes for hydrogen in a carbon chain.
C. A series of compounds with same molecular formula and different structural formulas.
D. A series of compounds with same molecular formula but different functional groups
10
94Much of the household cleaning, that was once performed using soap, is now performed using synthetic detergents. A major advantage of synthetic detergents over soaps is that they:
A. have a lower resistance to bacterial decomposition
B. form soluble compounds with common metal ions
c. are non-polar and dissolve more readily in grease
D. are more readily synthesized from common fats and oils
10
95Carbon atom is
A. monovalent
B. divalent
C . trivalent
D. tetravalent
10
96What is ( F ) ?
[
mathrm{F} frac{mathrm{H}^{oplus} / mathrm{KMnO}_{4}}{Delta} geq text { acetone }+text { ethanoic acid }
]
10
97A cylinder contains either ethylene or
propylene. ( 12 m l ) of gas required ( 54 m l ) of oxygen for complete combustion. The
gas is:
A. Ethylene
B. Propylene
c. 1: 1 mixture of two gases
D. 1: 2 mixture
10
98Glacial acetic acid is:
A ( .100 % ) acetic acid free of water
B. solidified acetic acid
C . gaseous acetic acid
D. frozen acetic acid
10
99Which of the following is not a source of
carbon?
A. limestone
B. dolomite
c. calcite
D. haemetite
10
100Burning of coal and diseal releases:
This question has multiple correct options
A ( cdot N O_{2} )
в. ( S O_{2} )
( c cdot C O_{2} )
D. None of these
10
101According to this reaction, ethanol is :
( 2 mathrm{C}_{2} mathrm{H}_{5} mathrm{OH}+2 mathrm{Na}-cdots->2 mathrm{C}_{2} mathrm{H}_{5} mathrm{ONa}+mathrm{H}_{2} )
A. Acidic in nature
B. Basic in anture
c. Amphoteric
D. Neutral
10
102Make a proper pair:
a) Fullerene
b) SWNT
c) MWNT
d) Carbon nano buds
A. ( a-2, b-4, c-1, d-3 )
B . ( a-3, b-1, c-2, d-4 )
c. ( a-4, b-2, c-1, d-3 )
D . ( a-1, b-3, c-4, d-2 )
10
103The allotrope of carbon which is a good conductor of heat and electricity is:
A. diamond
B. sugar charcoal
c. graphite
D. wood charcoal
10
104Explain the cleansing process of the soap and detergent.10
105What is combustion?10
106Which out of the following has smel similar to that of vinegar?
A. Methanol
B. Ethanol
c. Ethanoic acid
D. Formic acid
10
107Fullerene is an allotrope of carbon which is similar to a football. It has 60
carbon atoms joined together and no other element in it. There are various
types of fullerenes. ( C_{60}, C_{70}, C_{74} ) and ( C_{75} )
are the members of the fullerene family.
But ( C_{60} ) (pronounced as ( C ) sixty) is the most stable and most studied form
of fullerenes. What do you think is the
nature of the bond which is
joining these atoms together?
A. lonic
B. Covalent
c. Hydrogen
D. Polar covalent
10
108What is the action of the following reagents on ethanoic acid?
( P_{2} O_{5}, ) heat.
10
109How cloth is cleaned with the help of detergents?10
110Which of the following substance consists of only one element?
A. Diamond
B. Glass
c. Marble
D. sand
10
111form
conducts electricity.
A. diamond
B. graphite
c. coal
D. petroleum
10
112In the following sequence the product ( D ) ( mathrm{is}: C H equiv C H frac{H B r}{longrightarrow} A quad stackrel{H B r}{longrightarrow} )
( boldsymbol{B} quad stackrel{a l c . K O H}{longrightarrow} boldsymbol{C} stackrel{N a N H_{2}}{longrightarrow} quad boldsymbol{D} )
A. ethanol
B. ethane
c. ethyne
D. ethanal
10
113Q8. Identify the functional groups in the following compounds:
CHO
NH,
OMe
Y
OH
O
OCH.CH N(CH3)2
CH=CHNO2
10
114Detergents used for cleaning clothes and utensils contain?
A. bicarbonates
B. sulphonates
c. nitrates
D. bismuthates
10
115Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
A ( cdot C H_{2} C H_{2} O H )
в. ( C H_{3} O H )
c. ( C H_{3} ) СООН
D. ( C H_{3} C H O )
10
116Which of the following compound has
three ( 1^{circ} ), one ( 2^{circ} ) and one ( 3^{circ} ) carbon?
A ( cdot C H_{3}left(C H_{2}right)_{4} C H_{3} )
в. ( C H_{3} C Hleft(C H_{3}right) C H_{3} )
c. ( C H_{3}left(C H_{2}right)_{3} C H_{3} )
D. ( C H_{3} C Hleft(C H_{3}right) C H_{2} C H_{3} )
10
117When soap is added to hard water ( N a^{+} )
of soap is replaced by ( C a^{2+} ) or ( M g^{2+} )
ions and precipitates as ( C a ) or ( M g )
soap.
A. True
B. False
10
118Which pair of statements about
diamond and graphite is correct?
A. Diamond and graphite are both pure carbon. They are both macromolecules
B. Diamond and graphite can both be used as electrodes Graphite is also used as a lubricant
c. Diamond has covalent bonds. Graphite has ionic bonds
D. Diamond is hard with a high melting point. Graphite is soft with a low melting point.
10
119A crucible used in lab to heat solid at
high temperature is made of :
A. sulphur
B. silicon
c. graphite
D. phosphorus
10
120In the soap micelles:
A. the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster
B. ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster
c. both ionic and carbon chain are in the interior of the
cluster
D. both ionic end and carbon chain are on the exterior of
the cluster
10
121An allotropic form of carbon used for
cutting and drilling is :
A. charcoal
B. bone charcoal
c. graphite
D. diamond
10
122gas
10. On dehydration of cane sugar with concentrated sulphuric
acid, we get
(a) Sugar charcoal
to bott
(b) an allotrope of carbon that is amorphous1903
(c) an allotrope of carbon that is a very pure form of carbon.
(d) wood charcoal. nisam
10
123100. ……. are made from vegetable,
animal products and the oils of
certain flowers.
(1) perfumes (2) cosmetics
(3) cooking medium
(4) soaps
10
124Which allotrope of carbon is good conductor of electricity?
A. charcol
B. coal
c. Gas carbon
D. graphite
10
125Which of the following is a crystalline allotrope of carbon?
A. Charcoal
B. coal
c. Fullerene
D. Lamp black
10
126Ethanol is:
A. ionic compound
B. noble gas
C . polar covalent compound
D. non-polar covalent compound
10
127Why is detergent better than soap in
cleaning action?
10
128Why is soap referred to as salt?
A. It does not contain hydroxide ions
B. It has water of crystallization
C. It is prepared by reacting fatty acid with a strong base
D. All of above
10
129Given the structural formula for the
following:
Ethanal
10
130A chemical process in which a substance reacts with oxygen to give off
heat is
A. respiration
B. combustion
c. explosion
D. conduction
10
131Synthetic soaps are superior to ordinary
Soaps because:
A. they are cheap
B. they need not boiling water to wash
C. they can be used even in hard water
D. all of the above
10
132Two adjacent layers in graphite are bonded by comparatively forces.
A. strong
B. weak
c. both A and B
D. none of these
10
133Identify the odd one out from the
following.
A. Diamond
B. Buckminister fullerene
c. Lampblack
D. Graphite
10
134Even though both are oxidation processes, combustion and respiration are different in many aspects. Explain those differences.10
135( N a H C O_{3}+C H_{3} C O O H longrightarrow )
( C H_{3} C O O N a+C O_{2}+H_{2} O )
This reaction is used as a test of
carboxylic acid because :
A. gas is confirmed when it turns lime water black
B. gas is confirmed when it turns lime water milky
c. gas is confirmed when it turns lime water light green
D. gas is confirmed when it turns lime water brown
10
136Diamond on burning in oxygen gives:
A ( . C O )
в. ( C a(O H)_{2} )
( c cdot C O_{2} )
D. ( C a O )
10
137Which of the following product is obtained during reaction of ethanoic acid with diazomethane in presence of dil. H Cl?
A. Methyl acetate
B. Ethyl acetate
c. Methyl formate
D. Ethyl formate
10
138The number of free electrons in the
outermost shell of carbon in graphite is:
A. four
B. one
c. two
D. three
10
139Identify ‘A’ and ‘B’ in the following reaction and rewrite the complete
reaction.
[
boldsymbol{C H}_{3}-boldsymbol{C H}_{2}-boldsymbol{B r}+boldsymbol{A g C N} stackrel{boldsymbol{Delta}}{rightarrow}
]
( frac{boldsymbol{N} boldsymbol{a}}{boldsymbol{C}_{2} boldsymbol{H}_{5} boldsymbol{O} boldsymbol{H}} )
Explain Hoffmann bromamide degradation reaction.
10
140Assertion
Rectified spirit can be further purified by adding a dehydrating agent.
Reason
Addition of ( H_{2} S O_{4} ) to ( 96 % ) ethyl alcohol
gives ( 100 % ) ethyl alcohol
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
10
141When ethanol react with sodium,which
gas will produce?
A. hydrogen
B. oxygen
c. sodium ethoxide
D. carbon dioxide
10
142Give balanced chemical equations for the following conversations: Ethanoic acid to ethly ethanoate.10
143Some elements show the property of
existing in two or more distinct physical form which shows different
physical properties but same chemical properties. These distinct forms of an element are called:
( A ). isomers
B. allotropes
c. compounds
D. isobars
10
144Which of the following statement is
correct?
A. Carbon form oxides which are in nature
B. Metal can form only acidic oxides
c. Sodium metal is stored under kerosene
D. White phosphorus is kept under kerosene to avoid oxidation
10
145Which of the following pairs of compounds of carbon will undergo combustion as well as addition
reactions?
A. ( C H_{4} ) and ( C_{2} H_{6} )
в. ( C_{2} H_{6} O ) and ( C_{3} H_{8} ) O
c. ( C_{2} H_{4} O_{2} ) and ( C_{3} H_{6} O )
D. ( C_{2} H_{2} ) and ( C_{3} H_{6} )
10
146Assertion
Diamond and graphite are allotropes of carbon
Reason
Some elements can have several
different structural forms while in the
same physical state. These differing forms are called allotropes.
A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
c. If Assertion is correct but Reason is incorrect
D. If Assertion is incorrect but Reason is correct
10
147Select the correct statement.
A. Carbon-carbon bond order in graphite is more than diamond
B. Carbon-carbon bond order in graphite is less than diamond
C . Hybridization of each carbon in diamond is ( s p^{2} )
D. Hybridization of each carbon in graphite is ( s p^{3} )
10
148An organic compound ‘A’ produces a gas with brisk effervescence when
sodium bicarbonate is added to it. The
compound ‘A’ contains same number of
carbons as in ethane. The compound ‘A’
reacts with ethanol to form a sweet
smelling compound ‘C’ in presence of
conc. ( boldsymbol{H}_{2} boldsymbol{S} boldsymbol{O}_{4} ) acid. Then the name of
compound ( A ) and the gas evolved is:
A. ethanoic acid; ( C O_{2} )
B. methanoic acid; ( C O_{2} )
C . ethanoic acid; ( H_{2} )
D. methanoic acid; ( H_{2} )
10
149LPG can be used as a power source for:
A. combined heat and power technologies (CHP)
B. combined heat and energy technologies ( CHP)
C . combined heat and coal technologies (CHP)
D. heat and power technologies
10
150Write the types of allotropes of carbon Give any three examples of each.10
151Arrange the following hydrocarbons in the increasing order of volume of oxygen required for complete
combustion per mole under the same
conditions.
(a) Ethane
(b) Propyne
(c) Ethyne
(d) Propene
(e) Propane
(f) Ethene
A. ( c<f<a<b<d<e )
в. ( e<d<b<a<f<c )
c. ( c<b<f<d<a<e )
D. ( e<b<d<f<a<c )
10
152Q1. What is meant by catenation? Why does ‘C’ show the property of catenation to maximum extent?
AT
L
ihtomfit
10
153Assertion
Acetic acid turns blue litmus turns red.
Reason
Acetic acid is acidic in nature.
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.
10
154Distinguish between Diamond and
Graphite.
10
155The end product ( ^{prime} C^{prime} ) in the following sequence of chemical reactions is:
( boldsymbol{C H}_{3} boldsymbol{C O O H} stackrel{boldsymbol{C a C O}_{3}}{longrightarrow} boldsymbol{A} stackrel{boldsymbol{H e a t}}{longrightarrow} )
( boldsymbol{B} stackrel{N H_{2} O H}{longrightarrow} boldsymbol{C} )
A. Acetaldehyde oxime
B. Formaldehyde oxime
c. Methyl nitrate
D. Acetoxime
10
156Process that produces soap from fats is called as:
A. acidification
B. saponification
c. hydrolysis
D. condensation
10
157The unit of calorific value is :
( A cdot k J / k g )
B. kg/kJ
c. kB/kJ
D. g/ks
10
158Due to the weak Van der Waals’ forces
and less distance between the layers,
graphite:
A. show lubricating property
B. has lusture
c. is hexagonal
D. is a good conductor of electricity
10
159All allotropes of carbon exist in
state at room
temperature
A. liquid
B. solid
c. gas
D. plasma
10
160‘Carbon forms backbone of biology of life on earth’. Justify10
161The allotrope of carbon used in nuclear
reactor is :
A. graphite
B. diamond
( c cdot operatorname{coke} )
D. sugar charcoal
10
162How do you explain the role of oxygen in combustion process?10
163( boldsymbol{C}_{boldsymbol{g} text {raphite}}+boldsymbol{O}_{mathbf{2}(boldsymbol{g})} rightarrow boldsymbol{C} boldsymbol{O}_{2(boldsymbol{g})} ; boldsymbol{Delta} boldsymbol{H}= )
( -393.5 k J, Delta H ) of the reaction cannot
be:
A. Heat of formation of ( C O_{2} )
B. Heat of combustion of ( C O_{2} )
c. Heat of reaction
D. Heat of transition
10
164In diamond, the bonding between carbon atoms is :
A. co-ordinate
B. ionic
c. electrostatic
D. covalent
10
165( H-C-H ) bond angle in ethene and
ethane are ( _{-}-_{-}-_{-}- ) respectively
( mathbf{A} cdot 120^{0} ) and ( 109.5^{0} )
B. ( 180^{circ} ) and ( 109.5^{circ} )
C . ( 109.5^{circ} ) and ( 120^{circ} )
D. ( 120^{circ} ) and ( 180^{circ} )
10
166Identify the compound which is obtained in following reactions:
An alcohol from ethyl bromide:
10
167(i) It is used in making leads of pencils.
(ii) It is used as dry lubricant.
(iii) It is used in making black paint and printers ink.
(iv) It is used in nuclear reactors as
moderator.
Which is this substance?
A. Diamond
B. Buckminister fullerene
c. Lampblack
D. Graphite
10
168How can we test whether a given
compound is ethanoic acid or ethanol?
10
169Why do soaps not work in hard water?10
170Which of the following types of forces bind together the carbon atoms in diamond?
A. Van der Waal’s forces
B. lonic
c. covalent
D. Dipolar
10
171Which of the following is not a use of graphite?
A. Dry lubricant
B. Electrodes
c. Black paints
D. High precision thermometers
10
172Statement 1: When a hydrocarbon is
combusted in air, carbon monoxide is
the major product. Statement 2: Air contains much more
nitrogen than oxygen.
A. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.
B. Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.
c. Statement 1 is correct but Statement 2 is not correct.
D. Statement 1 is not correct but Statement 2 is correct.
E. Both the Statement 1 and Statement 2 are not correct.
10
173Ethanol reacts with sodium and forms
two products. These are:
A. sodium ethanoate and hydrogen
B. sodium ethanoate and oxygen
c. sodium ethoxide and hydrogen
D. sodium ethoxide and oxygen
10
174Molecular formula of cyclopentane is :
A. ( C_{6} H_{12} )
в. ( C_{6} H_{14} )
c. ( C_{5} H_{10} )
D. ( C_{5} H_{12} )
10
175Identify ( A ) and ( B ) in the following reaction ( boldsymbol{C H}_{3}-boldsymbol{C H}_{3} longleftarrow boldsymbol{B} )
( boldsymbol{C H}_{3} boldsymbol{C O O H} stackrel{boldsymbol{A}}{longrightarrow} boldsymbol{C H}_{3} boldsymbol{C H}_{2} boldsymbol{O H} )
A. ( H I+r e d P, L i A l H_{4} )
B. ( N V / Delta, ) LiAIH ( _{4} )
c. ( operatorname{LiAlH}_{4}, H I+r e d P )
D. ( P d-B a S O_{4}, Z n+H C l )
10
176Using the given hints, identify the option with correct coal product and its
use.
(1) Almost pure form of carbon
A. Coke, manufacture of steel
B. coal tar, manufacture of paints
c. coke, manufacture of plastics
D. Coal tar, extraction of metals
10
177Which of the following will react with sodium metal?
A. Ethanol
B. Ethanal
c. Ethene
D. Ethane
10
178Conc.
5.
C12H22011 →12C+11H2O
HSO4
Which of the following is obtained in the above reaction ?
(a) Animal charcoal (b) Sugar charcoal
(c) Coke
(d) Wood charcoal
10
179Which of the following statements is
incorrect for ethyl alcohol?
A. It is neutral to litmus.
B. It gives yellow crystalline precipitate with ( I_{2}+ ) dil. NaOH
C. It gives a product of fruity odour on reaction with ( C H_{3} C O O H )
D. It gives turbidity spontaneously on the addition of Lucas reagent.
10
180The first fullerene was discovered in :
A. 1970
в. 1967
( mathrm{c} .1997 )
D. 1985
10
181Buckminster fullerene is:
A. isotope of carbon
B. isobar of carbon
c. allotrope of carbon
D. none of these
10
182Which of the following is a property of ethanol?
A. lonic compound
B. Noble gas
c. Polar covalent compound
D. Nonpolar covalent compound
E. Metallic substance
10

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