We provide environmental chemistry practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on environmental chemistry skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.
List of environmental chemistry Questions
| Question No | Questions | Class |
|---|---|---|
| 1 | 210. Presence of which fuel gas in exhaust fumes shows incomplete combustion of fuel? (a) Sulphur dioxide (b) Carbon monoxide and water vapours ) (c) Carbon monoxide isbatando (d) Nitrogen dioxide |
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| 2 | 88. When polluted air is scrubbed with H,SO, solution, (a) CH, is oxidized to CO, (b) H,S is oxidized to sulphur (c) oxides of nitrogen and sulphur are oxidised (d) NO is reduced to N, |
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| 3 | Measurement of rate of oxygen utilisation by the unit volume of polluted water over a period of time is referred to as: A. fermentation B. chemical oxygen demand c. oxidation potential D. biological oxygen demand |
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| 4 | Which gas is known to shield the earth from harmful ultraviolet radiation? A ( . ) CO в. ( C O_{2} ) c. ( C F C s ) D. ( S O_{2} ) E. ( O_{3} ) |
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| 5 | The release of chlorofluorocarbons by the use of refrigerators, air conditioners, deodorants, etc., are destroying the ( _{text {一一一一一一一一 }} ) layer of the atmosphere. A. Mesosphere B. Ionosphere c. Humidity D. Ozone |
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| 6 | A raw material feedstock should be renewable rather than depleting, whenever technically and ecomonically practical, is an objective of: A. Green revolution B. Green chemistry c. waste management D. revolution resource recovery |
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| 7 | The concentration of dissolved oxygen (DO) in cold water can go upto: A. 10 ppm B. 14 ppm ( c .16 mathrm{ppm} ) D. 8 ppm |
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| 8 | Which of the following characteristic property of clay soil make it useful to grow plants? A. Retain water and moisture B. Do not retain water and moisture c. Holds lot of sand D. None of the above |
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| 9 | 45. Of the following which one pol- lutes the air of a big city ? (1) Copper (2) Chromium (3) Lead (4) Calcium |
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| 10 | 0.18 Acid rain is known to contain some acids. Name these acids and where from they come in rain? UNO od |
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| 11 | Q. 12 Which of the following practices will not come under green chemistry? (a) If possible, making use of soap made of vegetable oils instead of using synthetic detergents (b) Using H,O, for bleaching purpose instead of using chlorine based bleaching agents (c) Using bicycle for travelling small distances instead of using petrol/diesel based vehicles (d) Using plastic cans for neatly storing substances |
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| 12 | Thermal pollution causes a decrease in dissolved oxygen Is the above statement true? A. True B. False |
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| 13 | The value of dissolved oxygen in polluted water is: A ( .>4 ) ppm В. ( <4 ) ppm ( mathbf{c} .=4 mathrm{ppm} ) ( mathrm{D} .=6 mathrm{ppm} ) |
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| 14 | Biochemical Oxygen Demand(BOD) value can be a measure of water pollution caused by the organic matter. Which of the following statements is correct? A. Polluted water has BOD value higher than 10 ppm B. Aerobic bacteria decrease the BOD value C. Anaerobic bacteria increase the BOD value D. Clean water has BOD value higher than 10 ppm |
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| 15 | The gas that is responsible for global warming is | 11 |
| 16 | Which of the following eliminates the species from a particular area? I. Use of insecticides II. Hunting of the species as prey III. Habitat destruction A. True B. False |
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| 17 | Photochemical smog affects plants by A. Bleaching of leaves and excess production of pigments B. Shedding of foliage and increase of transpiration C. Decolourising and curling of leaves D. Degradation of chlorophyll by ozone |
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| 18 | Assertion Ney York City may submerge due to global warming. Reason Due to global warming, glaciers are melting and due to this sea-level will be certainly increasing which may cause flooding of cities situated at the bank of the sea. New York is one of them. 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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| 19 | State True or False. Forest Fires and droughts are man made causes of deforestation A. True B. False |
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| 20 | photochemical 158. Which of the following statements about photocher smog is incorrect? (a) It has high concentration of oxidizing agents (b) Plantation of some plants like pinus helps controlling photochemical smog (c) It can be controlled by controlling the release NO,, hydrocarbons, ozone, etc. (d) It has low concentration of oxidizing agents |
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| 21 | Consider the following statements: 1. Global Warming is a phenomenon in which lower atmosphere traps more terrestrial radiation and thus the mean global temperature of the earth rises beyond ( 14^{circ} mathrm{C} ) 2. Global Warming takes place because of rise in the concentration of gases known as greenhouse gases namely- water, vapour, ( C O_{2}, C H_{4}, ) oxides of Nitrogen and man-made gases like ( boldsymbol{C F C s} ) 3. Among the greenhouse gases, ( C O_{2} ) is primarily responsible for Global Warming. Which of the statements given above is/are correct? ( A cdot 1,2 ) and 3 B. 2 and 3 c. only 2 D. only 3 |
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| 22 | Pollution is a change in physical, chemical or biological characters of our land and water that may be: A. desirable and harmful to humans B. desirable and useful to humans c. undesirable and harmful to humans D. undesirable and useful to humans |
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| 23 | Taking chromium and arsenic, which are toxic, out of pressure-treated wood, and using new less toxic chemicals for bleaching paper, are examples of A. Green chemistry B. Green revolution c. revolution resource recovery D. waste management |
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| 24 | Which of the following are the Green house gases? A. ( C O_{2}, C H_{4}, N_{2} O ) and ( O_{3} ) B. ( C O_{2} ), Octane, chlorine, Nitrogen c. Methane, Oxygen, Helium, Neon D. None of these |
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| 25 | The amount of oxygen used by microorganisms present in water for five days at ( 20^{circ} mathrm{C} ) is called : A. ( operatorname{cod} ) B. DO c. TLV D. BOD |
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| 26 | BOD stands for: A. Biochemical Oxygen Demand B. Biological Oxygen Demand C. Bacterial Oxidation Demand D. Biochemical Oxidation Demand |
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| 27 | Which of the following statements is false? A. The main reason for river water pollution is industrial and domestic sewage discahrge B. Surface water contains a lot of organic matter mineral nutrients and radioactive materials c. oil spills in sea water causes heavy damage to fishery D. oil slick in a sea water increases DO value |
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| 28 | Q2. What is the name of the compound formed when CO combines with blood? | 11 |
| 29 | Q. 38 Match the pollutants given in Column I with their effects given in Column II. Column! Column II A Phosphate fertilisers in water 1. BOD level of water increases B. Methane in air 2. Acid rain c Synthetic detergents in water 3. Global warming D. Nitrogen oxides in air 4. Eutrophication |
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| 30 | 78. Identify the incorrect statement from the following: (a) Oxides of nitrogen in the atmosphere can cause the of depletion of ozone layer (b) Ozone absorbs infrared radiation (c) Depletion of ozone layer is because of its chemical reactions with chlorofluoroalkanes (d) Ozone absorbs the intense ultraviolet radiation of the sun |
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| 31 | Which one of these is not damaged due to excess lead in drinking water? A. Kidney B. Liver C. Reproductive system D. Teeth |
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| 32 | Assertion(A): Atmosphere plays an important role in maintaining the heat balance on earth.
Reason(R): Atmosphere absorbs a portion of electromagnetic |
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| 33 | Which of the following is a set of green house gases? A. ( O_{3}, N O_{2}, S O_{2}, C l_{2} ) в. ( C O_{2}, C H_{4}, N_{2} O, O_{3} ) ( mathrm{c} cdot O_{3}, N_{2}, C O_{2}, mathrm{NO}_{2} ) D. ( C H_{4}, O_{3}, N_{2}, S O_{2} ) |
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| 34 | Identify the primary cause of global warming. A. Emission of ( C O_{2} ) B. Emission of ( O_{2} ) c. Both a and ( b ) D. None of these |
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| 35 | Global warming leads to: A. increase in actual temperature of earth B. decrease in actual temperature of earth C. no change in temperature D. change in pressure |
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| 36 | Q3. Give three examples in which green chemistry has been applied. 1. … co in nlace of tetrachlos |
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| 37 | Modes of controlling pollution in large cities include : A. less use of insecticides B. proper disposal of organic wastes, sewage and industrial effluents c. shifting of factories out of the residential area D. all of the above |
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| 38 | When the soil of the greenhouse nurseries is sterilized with methyl bromide gas, it leads to a deficiency of: A. cellulose in roots B. chlorophyll in green leaves c. zinc in plants D. iron in red flowers |
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| 39 | Which of them are Non-biodegradable waste? A. Synthetic fibers B. Pen refills c. silver foil D. All of above |
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| 40 | Chlorine atoms in the upper atmosphere cause the breakdown of ozone. ( boldsymbol{C l}+boldsymbol{O}_{3} rightarrow boldsymbol{O}_{2}+boldsymbol{C l O} ) ( boldsymbol{C l O}+boldsymbol{O} rightarrow boldsymbol{C l}+boldsymbol{O}_{2} ) Which statements about these chlorine atoms are correct? 1. The chlorine atoms act as catalysts. 2. The chlorine atoms are free radicals. 3. The chlorine atoms are formed by heterolytic fission of a covalent bond in chlorofluorocarbons. A .1,2 and 3 are correct B. 1 and 2 only are correct c. 2 and 3 only are correct D. 1 only is correct |
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| 41 | COD is a measure of: A. organic substance in water B. oxides of sulphur, phophorus,nitrogen in water C. inorganic pollutants in water D. salinity of water |
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| 42 | Use of pesticides which do not contaminate soil help in control of A. air pollution B. soil pollution c. industrial pollution D. none of above |
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| 43 | Which of the following gases can result in the formation of acid rain? A. Ozone B. Carbon monoxide c. Sulphur dioxide D. chlorofluorocarbon |
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| 44 | Sludge is: A. created from combination of gases released from industries and water B. a semi-solid slurry and can be produced as sewage sludge from wastewater treatment processes C. a type of household waste D. a type of industrial waste |
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| 45 | If BOD value is greater than 17 ppm, then water belongs which of the following to category? A. Normal water B. Highly polluted water c. Usable water D. Slightly polluted water |
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| 46 | Green house effect is mainly due to increase in the levels of ( A cdot O_{2} ) в. ( C O ) ( c cdot C O_{2} ) D. ( N_{2} ) |
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| 47 | What is the link between domestic waste and acid rain? |
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| 48 | What is green chemistry? Write one importance of green chemistry. | 11 |
| 49 | Write short notes on, (a) Biological concentration and magnification, (b)DDT, (C) Bordeaux mixture, (d) IPM, (e) Natural insecticides, (f) Biopesticides, (g) Bioinsecticides |
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| 50 | Addition of phosphate and nitrate/fertilizers into water leads to: A. increased growth of decomposers B. reduced of algae growth c. increased growth of algae D. nutrient enrichment |
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| 51 | Q. 21 On the basis of chemical reactions involved, explain how chlorofluorocarbons cause thinning of ozone layer in stratosphere? do |
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| 52 | What is acid rain? Mention two of its effects. |
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| 53 | is the collective name for layers of soil. A. A-horizon B. B-horizon c. c-horizon D. Soil profile |
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| 54 | Q. 29 Oxidation of sulphur dioxide into sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Explain how does this happen? Give chemical reactions for the conversion of So, into S03. trimido can necur both photochemically a |
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| 55 | Which of the following properties of soil decreases due to deforestation? A. Nutrient content B. Fertility c. Texture D. All of the above |
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| 56 | The presence of which of the following in drinking water is responsible for mottling of teeth? A. Mercury B. lodine c. Chlorine D. Fluorine |
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| 57 | Which soil is used to make decorative articles and pots used for growing plants? A. Multani soil B. Terracotta soil c. shadu soil D. Kaolin (china clay) |
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| 58 | Distilled water is clean and pure water, but unfit for human consumption. A. True B. False |
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| 59 | The first organic pesticide to be used commercially was A. Bordeaux mixture B. Burgandy mixture c. DDT D. 2, ( 4- ) D |
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| 60 | Acid rain is caused due to increase in concentration of (in atmosphere) A. ( S O_{2} ) and ( N O_{2} ) B. ( operatorname{coand} C O_{2} ) c. ( operatorname{coand} S O_{3} ) ( mathrm{D} cdot O_{3} ) and dust |
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| 61 | Which of the following provides shelter for many living organisms? A. A-Horizon B. B-Horizon c. C-Horizon D. None of the above |
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| 62 | Q18. A large number of fish are sud a large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill. llutants such as leaves, grass trash etc.) present in 11 |
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| 63 | What constitutes smog? | 11 |
| 64 | What compounds are identified as contributing to acid rain? A. Carbon dioxide B. Sulphur and nitrogen oxides c. Mercury oxides D. Phosphates |
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| 65 | ( 10 mathrm{mL} ) of water required ( 1.47 mathrm{mg} ) of ( K_{2} C r_{2} O_{7}left(M . w t_{.}=294right) ) for oxidation of dissolved organic matter in presence of acid. Then the ( C .0 . D ) of water sample is: A. 2.44 ppm B. 24 ppm c. 32 ppm D. 1.6 ppm |
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| 66 | Q15. Give one example of organic herbicide. An Triazine |
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| 67 | 96. NO and H.S both the pollutants of air. NO is remover while H, S is NO remover. Under these effect (a) NO is oxidized to NO, and H, S is oxidized to H.So (b) NO is oxidized to NO, and H.S is reduced to H.S.O (C) NO is reduced to NH, and H. S is oxidized to sulphur (d) NO is reduced to N, and H.S is oxidized to sulphur |
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| 68 | Current commercial method for producing ibuprofen is a stunning application of Green chemistry because A. ibuprofen is an anti-inflammatory drug and has various applications B. the previous method required large amounts of solvents and generated large wastes compared to the current method C. it has very important medicinal value D. this compound has very less side effects after usage |
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| 69 | Maximum prescribed limit of ( C u ) in drinking water is: ( A cdot 2 p p m ) B. 1 ppm c. 3 ppm D. 5ppm |
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| 70 | Which of the following is the main factor of water pollution? A. Smoke B. Industrial waste c. Detergent D. Ammonia |
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| 71 | Q. 26 What is the importance of measuring BOD of a water body? | 11 |
| 72 | Eutrophication means A. excessive richness of nutrients in a water body or lake due to run off B. decrease in growth of algae C. increase in fertility of soil D. all the above |
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| 73 | The progressive warming up of the earth’s surface is mainly due to : A. automobile exhaust B. blanketing effect of carbon dioxide in atmosphere c. reforestation D. thickening of ozone layer |
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| 74 | 137. Nobel prize in green chemistry is not associated with (a) Richard R Schrock (b) Yves Chauvin (c) Robert H Grubbs (d) R Williamson |
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| 75 | 44. Smog is a combination of (1) air and water vapour (2) water and smoke (3) fire and water (4) smoke and fog |
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| 76 | Which pollutant gas is produced by the decomposition of vegetation? A. Carbon monoxide B. Methane c. Nitrogen dioxide D. Sulfur dioxide |
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| 77 | Erosion can be caused by which of the following? A. Rain falling on steeply sloping land B. A very hard rainfall c. Rain falling on bare soil D. All of the above |
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| 78 | Maximum prescribed limit of Al in drinking water is: ( A cdot 5 ) ppm B. 2 ppm c. ( 0.2 mathrm{ppm} ) D. 0.5 ppm |
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| 79 | Chemical pollution is mainly due to the discharge of organic ( & ) inorganic substances released into the water. Is the above statement correct? A . True B. False |
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| 80 | 225. The statement which is not correct about control of particulate pollution. (a) In electrostatic precipitator, the particulates are made to acquire positive charge which are then attracted by the negative electrode and removed. (b) Gravity setting chamber removes larger particles from the air. (c) Cyclone collector removes fine particles in the diameter range 5–20 microns. (d) Wet scrubbers are used to wash away all types of particulates. |
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| 81 | An area of soil is thoroughly wefted and allowed to drain until capillary movement of water stopped. The water contents of the soil will give an estimate of its A. Capillary water B. Storage water c. Field capacity D. Gravitational water |
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| 82 | What is the effect of release of ( C O_{2} ) gas on atmosphere? A . Global warming B. Photochemical smog c. Ozone layer depletion D. Tsunami |
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| 83 | Which of the following are the substances that are present in the soil and required for the growth of crops? A. Manures B. Pesticides c. Fertilisers D. Nutrients |
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| 84 | Which is not the green house gas among the following? A. Chlorofluorocarbons B. Argon c. water vapour D. Carbon-dioxide |
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| 85 | The non-viable particulate among the following is: A. dust B. bacteria c. moulds D. fungi |
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| 86 | 116. If the organic content in water is high, the type of chlorination to be adopted is (a) double chlorination (b) breakdown chlorination (c) superchlorination (d) post-chlorination |
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| 87 | 38. Water is often treated with chlorine to (a) Kill germs (b) Increases (c) Remove hardness (d) Remove suspended particles |
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| 88 | What are the harmful effects of photochemical smog and how can they be controlled? |
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| 89 | Carbamates are used as a A. Insecticide B. Herbicides C . Fungicides D. All of the above |
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| 90 | Which of the following is not a major option for managing hazardous waste? A. Reducing the production of waste while increasing the amount generated B. Reducing the volume and/or hazard of the wastee c. Long-term storage or disposal D. Dumping at sea |
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| 91 | Soil is a natural medium for growth of land plants. Organic soil contains organic number upto a depth of A. Two and a half feet B. One foot c. six inches D. Ten feet |
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| 92 | Identify an example of a successful way to dispose of hazardous waste. A. Deep injection B. Well burn it in an incinerator plant c. Put it in a metal cask and throw it in the ocean D. Bury in a metal drum in a regular landfill |
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| 93 | Water holding capacity of the soil depends upon A. Chemical composition of soil B. Particle size of soil c. Aggregation of soil particle D. All of these |
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| 94 | Q3. How are NO and NO, formed in the atmosphere? | 11 |
| 95 | Which of the following does not cause soil pollution? A. Industrial wastes B. Urban wastes c. Agricultural practices D. None of above |
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| 96 | 92. Oxides of sulphur and nitrogen can be removed by scrubbing with (a) Ca(OH), (b) H2SO4 (c) Both (a) and (b) (d) None of these |
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| 97 | 1 111. Very fine suspended and colloidal impurities are removed by a process called (a) softening (b) coagulation (c) disinfection (d) plain sedimentation |
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| 98 | Identify the non-Green House Gas (GHG) from the following A. Methane B. Nitrous oxide c. sulphur hexafluoride D. Carbon monoxide |
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| 99 | 113. A common disinfectant used in village wells is (a) potassium permanganate (b) iodine and bromine (c) ozone gas (d) free chlorine |
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| 100 | A river with high BOD value is A. Highly polluted B. Highly clean c. Highly productive D. Highly conducive for pisciculture |
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| 101 | 2.8 The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is (a) stratosphere (b) troposphere (c) mesosphere (d) hydrosphere An (5) Tronconha har 14 vtende into the hainbat |
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| 102 | Smog is formed when fog is mixed with A. Sulphur B. Mercury c. smoke D. Snow flakes |
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| 103 | Excessive release of ( C O_{2} ) into the atmosphere results in: A. polar vortex B. depletion of ozone ( c . ) formation of smog D. global warming |
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| 104 | Intermediate compound formed in the depletion of ( boldsymbol{O}_{3} ) layer by chlorofluorocarbons is: ( mathbf{A} cdot O_{2}, F_{2} ) в. ОС l c. ( O F_{2} ) D. ( C l_{2} O ) |
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| 105 | Most hazardous metal pollutant of automobile exhaust is: A. mercury B. tin c. cadmium D. leadd |
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| 106 | Photochemical smog always contains A. aluminium ions B. methane c. ozone D. phosphorus |
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| 107 | 31. Consider the following statement and select the correct option: S,: Dust is the non-viable particle. S,Particulates acquire negative charge and are attracted by the positive electrode. Sz: 0, is a greenhouse gas. S: Algae is a viable particulate. (a) S, and S, only (b) S,, S, and S, only (c) S, S, and S, only (d) S2, S, and SA |
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| 108 | Which of the following countries suffer from the acid rains? 1. Canada 2. France 3. Norway 4. Germany Select the correct answers from the codes given below: A . 1 and 2 B. 1 and 3 ( c cdot 2 ) and 3 D. 3 and 4 |
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| 109 | Q6. What is smog? How is classical smog different from photochemical smog? ci |
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| 110 | Global warming could result in wide ranging effects on: A. rainfall patterns B. agriculture, forests c. plants and animals D. All of the above |
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| 111 | Which of the following is a microbial pesticide? A. Rotenone B. Thurioside c. Baygon D. Temik |
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| 112 | 43. Carbon footprint can be reduced by (1) All of these (2) Recycling waste materials (3) Using energy efficient appli- ances (4) Commuting by public trans- port |
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| 113 | Identify the correct statement. A. Non-conventional sources of energy cause more pollution. B. Ozone is a harmless gas present in atmosphere. C. Chlorofluorocarbons break down to chlorine atoms by ultraviolet radiation D. Trees do not help in decreasing sound pollution. |
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| 114 | Atmosphere of big cities is polluted most by : A. Automobile exhausts B. Radioactive fall out c. Household waste D. Pesticide residue |
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| 115 | Treatment of waste water involves physical, chemical, and biological processes, which remove matter that contaminates waste water. A. physical B. chemical and biological c. both ( A ) and ( B ) D. none of the above |
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| 116 | Waste management is A. to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc B. the collection, transportation, disposal or recycling and monitoring of waste C. the process of creating a clean and green environment D. None of above |
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| 117 | Classical smog is also called: A. oxidising smog B. reducing smog c. photochemical smog D. summer smog |
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| 118 | The concentration of pesticide required to destroy ( 50 % ) of pest is called as A . LD 50 B. LC 50 c. LB 50 D. LE 50 |
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| 119 | The process of ‘eutrophication’ is due to A. increase in concentration of insecticide in water B. increase in concentration of fluoride iron in water C. the reduction in concentration of the dissolved oxygen in water due to phosphate in water D. attack of younger leaves by peroxyacetyl nitrate |
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| 120 | 192. Which of the following statements (1)-(IV) are true about photochemical smog? (1) It occurs in warm, dry and sunny climate. (II) It is formed from the action of sunlight on unsaturated hydrocarbons and oxides of nitrogen (II) It is called oxidizing smog. (IV) It is called reducing smog. (a) I, II and IV (b) II, III and IV (c) I, III and IV (d) I, II and III |
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| 121 | Assertion Catalytic converters must be used in cars. Reason Catalytic converter helps to reduce the formation of acid rain. 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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| 122 | Q. 7 Which of the following statements about photochemical smog is wrong? (a) It has high concentration of oxidising agents (b) It has low concentration of oxidising agent (c) It can be controlled by controlling the release of NO,, hydrocarbons, ozone etc (d) Plantation of some plants like pinus helps in controlling photochemical smog in to50 |
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| 123 | Chlorine is the main factor to damage ozone layer. CFC is considered responsible for ( 80 % ) of total decrease in ozone layer. If the pollution in the atmosphere increases, which of the following is possible in future? P. The ice at poles will melt and all the organisms will die living at the island. Q. Many organisms living at island may migrate. R. The existence of forests on the Earth will be no more. A . Only Q B. Only P and Q c. All P, Q and R D. only Q and R |
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| 124 | 144. Which of the following legislation gave birth to today’s Green Chemistry initiatives? (a) Pollution prevention Act of 1990 (b) Montreal Protocol of 1989 (C) Clean Water Act of 1972 (d) Superfund Act of 1980 |
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| 125 | Underground soil in cities is likely to be polluted by: A. floods B. decomposed and partially decomposed materials of sanitary wastes c. fertilisers D. landslides |
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| 126 | 49. The substance having the largest concentration in acid rain? (a) H2CO3 (c) HCl (b) HNO, (d) H.SO, |
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| 127 | Which soil is used in cosmetics? A. Multani soil B. Terracotta soil c. Shadu soil D. Kaolin |
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| 128 | 87. Lead is (a) air pollutant (b) noise pollutant (c) radioactive pollutant(d) water and soil pollutant |
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| 129 | Chronic bronchitis and emphysema are more vulnerable to: A. acid rains B. water pollutants c. smog D. nitrogen oxides |
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| 130 | In which of the following pairs, both of them are common greenhouse gases? A. Oxygen, water vapour B. Methane, carbondioxide c. ozone, sulphurdioxide D. Nitric oxide, chlorofluoro carbons |
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| 131 | What are the major causes of water pollution? Explain. | 11 |
| 132 | In antarctica, ozone depletion is due to the formation of which of the following compounds? A. Acrolein B. PAN c. PCBs D. Chlorine nitrate |
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| 133 | Acid rain occurs due to atmospheric pollution of: ( A cdot S O_{2} ) в. ( N H_{3} ) ( c cdot C O_{2} ) D. ( N_{2} O ) |
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| 134 | Q12. What is the composition of London Smog? | 11 |
| 135 | Ruchi noticed a major problem in her state. She found that more and more land area in her state is turning into desert. What is the condition called? A. Deforestation B. Barren land c. Desertification D. Afforestation |
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| 136 | Q.1 Which of the following gases is not a green house gas? (a) CO (b) 03 (c) CH (d) H,O vapour |
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| 137 | Which of the following decides the standards for drinking water in Europe? A. European Environment Protection Agency B. European Drinking Water Directive c. European Union Standards D. European Safe Water Act |
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| 138 | Height of Stratosphere above earth’s surface in ( (mathrm{Km}) ) is: A . ( 0-10 ) B. 10-50 c. ( 50-85 ) D. 85-100 |
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| 139 | Which of the following statements is not true? ( mathbf{A} cdot C O_{2} ) is the best fire extinguisher B. Global warming can cause acid rain C. Burning of coal and diesel releases sulphur dioxide gas D. LPG has higher calorific value than biogas |
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| 140 | Air contains ( 79 % N_{2} ) and ( 21 % O_{2} ) by volume. If the barometric pressure is ( 750 m m H g ) the partial pressure of oxygen is: ( left(d N_{2}=1.25, d O_{2}=1.42 g / mright) ) A. ( 157.5 mathrm{mm} ) of ( mathrm{Hg} ) в. ( 175.5 mathrm{mm} ) of ( mathrm{Hg} ) c. ( 315.0 mathrm{mm} ) of ( mathrm{Hg} ) D. None |
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| 141 | The possible hazards of air pollution are due to : A) acid rains B) photo chemical reactions taking place at stratosphere C) an increase in the ( C O_{2} ) level in the atmosphere ( A cdot A & B ) B. B & ( c ) ( c cdot c & A ) D. ( A, B & C ) |
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| 142 | Which of the following pollutants is released from the emission tubes of diesel engines? A. Mercury B. Aluminium c. Benzopyrene D. ( C F C l_{2} ) |
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| 143 | We harm Earth with various activities such as unorganised disposal of waste. Which of the following kinds of wastes lasts longest in the environment? A. Kitchen waste B. Chemical waste from factories c. Agricultural waste D. Nuclear waste |
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| 144 | What is soil erosion? | 11 |
| 145 | 06. Consider the following reactions provided by scientists working in Antarctica about ozone hole. (1) CIOº + NO2 →CIONO, (II) CI+CHA- CH3 + HCI (III) CIONO, +1,0—— HOCI + HNO, (IV) CIONO, + HCl + Cl2 + HNO2 In summer season, there is less depletion of ozone layer due to reactions. (a) Both I and III (b) Both III and IV (c) Both I and II (d) Both II and IV |
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| 146 | 166. Which of the following is an important part of photochemical smog? (a) SO2 (b) CO (c) CO2 (d) NO, |
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| 147 | Green fuel is the fuel obtained from: A. Bio-waste B. Metal waste c. Plastic waste D. Chemical waste E. Electronic waste |
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| 148 | What is the range of pH of acid rain? A. More than 5.6 B. Less than 5.6 c. In between 5.6 to 6.6 D. In between 6.0 to 6.6 |
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| 149 | Which of the following statements is/are correct for generating nonbiodegradable waste? A. Thermal power plants producing fly ash B. Iron and steel plants producing blast furnace slag c. Metal industries producing mud and tailings D. All of the above |
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| 150 | Which of the following cause water pollution? A. Smoke/fly ash B. Automobile exhausts c. silt and pesticides D. Aeroplanes |
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| 151 | Q17. What is PAN stands for? | 11 |
| 152 | The agricultural field that produces maximum methane gas into atmosphere is: A. wheat field B. paddy field c. cotton field D. groundnut field |
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| 153 | 11. Which of the following statement is false? (a) Photochemical smog causes irritation in eyes (b) London smog is oxidizing in nature (c) London smog is a mixture of smoke and fog (d) Photochemical smog results in the formation of PAN |
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| 154 | 20. Removal of So, and SO, can be done by CaCO, using (a) non-regenerative process (b) regenerative process (c) Both (a) and (b) (d) None of the above |
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| 155 | Long answer type questions: Define soil erosion, It’s cause and a few remedial steps that can be taken to control soil erosion. |
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| 156 | Which of the following pairs is not correctly matched? A. Allotropic form of sulphur which is more stable at room temperature – Rhombic B. The hydride of group 16 which is liquid at room temperature – Water C. The gas formed in the upper layers of atmosphere by action of U V radiations – Nitrogen D. The catalyst used in the manufacture of ( H_{2} S O_{4} ) by contact process – Vanadium pentoxide |
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| 157 | Global warming is due to the increase of: A. methane and nitrous oxide in atmosphere B. methane and ( C O_{2} ) in atmosphere c. methane and ( O_{3} ) in atomsphere D. methane and co in atmosphere |
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| 158 | Q1. What do you mean by primary and secondary pollutants of the air? Ans Primon nollutuntum CA |
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| 159 | Which of the following are greenhouse gases? A. Carbon dioxide B. Water vapour c. Both A and B D. None of these |
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| 160 | or using plants (such as willow) to extract heavy metals can prevent soil pollution. A. Phytoremediation B. Biofertilizer c. Bioremediation D. None of above |
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| 161 | What are the effects of acid rain ? | 11 |
| 162 | 2. Which of the following causes less pollution? (a) NO, (h) so (c) CO2 (d) C, H, |
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| 163 | 226. Cl, and So, are pollutants as well as bleaching agents. Their bleaching action is due to SO, CI, (a) Oxidation Oxidation (b) Reduction Reduction (c) Oxidation Oxidation (d) Reduction Oxidation |
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| 164 | Q2. What is the compound formed when CO combines with blood? | 11 |
| 165 | 9. Which of the following causes lung cancer? (a) Paper (b) Asbestos (c) Silica (d) Textiles |
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| 166 | The type of pollution caused by spraying DDT is: A. air and soil B. air and water c. air D. air, water and soil |
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| 167 | Pollution is: A. removal of top soil B. release of toxic/undesirable materials in environment C. conservation of energy D. all of the above |
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| 168 | soil holds plenty of air. A. Sandy B. Clayey c. silt D. Both B and C |
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| 169 | What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas. |
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| 170 | 82. Phosphate pollution is caused by (a) sewage and agricultural fertilizers (b) agricultural fertilizers only (c) phosphate rocks and sewage (d) weathering of phosphate rocks only |
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| 171 | Q20. What is meant by polar vortex? | 11 |
| 172 | 162. Which is not the constituent of photochemical smog? (a) RCHO (b) RCOR (c) CF C12 (d) PAN y recobetochemical smog? |
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| 173 | Which one of the following is not a green house gas? A. ( C O_{2} ) в. ( H_{2} ) о c. ( N_{2} ) D. ( O_{3} ) |
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| 174 | 53. Atmosphere of big/metropolitan cities are polluted most by: (a) automobile exhausts. (b) pesticide residue. (C) household waste. (d) radioactive fall out. |
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| 175 | Statement(A): For green house effect, presence of green plants is essential. Statement ( (mathrm{R}): C O_{2} ) and water vapour present in the atmosphere absorb the re-emitted IR radiation from the earths surface and warm the air A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not correct explanation of A c. ( A ) is true and ( R ) is false D. A is false and R is true |
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| 176 | Q19. How can domestic waste be used as manure? A |
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| 177 | Environmental degradation means A. Overall lowering of environmental qualities. B. The adverse change brought in by human activities. C . Ecological imbalance D. All the above |
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| 178 | Which of the following is not properly matched? A. Formaldehyde – Carcinogenic B. Sulphur dioxide – Respiratory problems c. Nitrogen oxide – Brown air D. Photochemical smog – Green air |
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| 179 | Q1. How carbon monoxide acts as a poison for human beings? | 11 |
| 180 | 139. Green chemistry aims to (a) design chemical products and processes that maximize profits (b) utilize non-renewal energy (c) design chemical products and processes that work most efficiently (d) design safer chemical products and processes that reduce or eliminate the use and generation of hazardous substances |
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| 181 | 3. Besides CO2, the other greenhouse gas is (a) Ar (b) N2 (c) O₂ 4 BOD i |
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| 182 | Which of the following gasses contribute to greenhouse effect? A. ( C O_{2} ) в. ( C H_{4} ) c. ( C F C ) s D. All of the above |
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| 183 | Assertion The amount of BOD in the waters is a measure of the amount of organic material in the water. Reason Clear water has BOD less than 5 ppm whereas highly polluted water have BOD value of 17 ppm or more. 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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| 184 | 7. The pollutant released in Bhopal gas tragedy was (a) Ammonia (b) Mustard gas (c) Nitrous oxide 8. Ahich of the follow (d) Methyl isocyanate 11. Donc |
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| 185 | Major chemical species present in stratosphere is: A. ( N_{2}, O_{2} ) в. ( O_{3}, H_{2} O ) c. Both A and B D. None of these |
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| 186 | What is bad ozone and good ozone? | 11 |
| 187 | The spores of Bacillus thuringiensis are used as bioinsecticide. Comment. |
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| 188 | Acid rain is caused by or recent reports of acid rain in some industrial cities are due to the effect of atmospheric pollution by A. Excessive release of ( C O_{2} ) by burning of fuels like wood and charcoal, cutting of forests and increased animal population B. Excessive release of ( N O_{2} ) and ( S O_{2} ) in the atmosphere by burning of fossil fuel C. Excessive release of ( N H_{3} ) by industrial plants and coal gas D. Excessive release of ( mathrm{CO} ) in the atmosphere by incomplete combustion of coke, charcoal and other carbonaceous fuel in the of oxygen |
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| 189 | Q1. What is meant by PCBs? | 11 |
| 190 | Green chemistry means such reactions which: A. produce colour during reactions B. reduce the use and production of hazardous chemicals C. are related to the depletion of ozone layer D. study the reactions in plant |
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| 191 | An effective air-pollution control equipment is an attachment that electrically attracts pollutant particles in hot, escaping gases. It is known as: A. an electric condenser B. a gas condenser c. an air purifier D. an electrostatic precipitator |
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| 192 | What is the pollutant produced from industries and chemical factories? A. Sediments B. Radioactive substances c. Toxic heavy metals D. organic wastes |
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| 193 | Which of the following is not a cause of pollution? A. Afforestation B. Wars among nations c. Industrialization D. Growth of algae in water |
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| 194 | Q. 37 Match the activity given in Column I with the type of pollution created by it given in Column II. Column Column II (Activity) (Effect) A. Releasing gases to the atmosphere after 1. Water pollution burning waste material containing sulphur B. Using carbamates as pesticides 2. Photochemical smog, damage to plant life, corrosion to building material, induce breathing problems, water pollution C. Using synthetic detergents for washing 3. Damaging ozone layer clothes D. Releasing gases produced by automobiles 4. May cause nerve diseases in human and factories in the atmosphere E. Using chlorofluorocarbon compounds for 5. Classical smog, acid rain, water cleaning computer parts pollution, induce breathing problems, damage to buildings, corrosion of metals |
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| 195 | is the contamination of water by substances harmful to life. A. Water pollution B. Air pollution c. Noise pollution D. None of the above |
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| 196 | Arid soil is formed in western Rajasthan. Its main features are: I. Arid soils range from red to yellow in colour. II. They are generally sandy and saline. III. Humus and moisture content is very low due to dry climate and faster evaporation. IV. Thorny bushes are found in this region B. Only II and III c. only I, II and i v D. Only II, III and IV |
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| 197 | Q3. Give three examples in which green chemistry has been applied. | 11 |
| 198 | The primary pollutant that leads to photochemical smog is : A. sulphur dioxide B. acrolein c. ozone D. nitrogen oxides |
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| 199 | Global warming is caused due to_ concentration of Co, in air (a) Decreased (b) increased (c) Both (a) & (b) (d) None of these |
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| 200 | Prepare slogans on greenhouse effect to announce in your school assembly. |
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| 201 | B.0.D values of four samples of water ( A ) ( mathrm{B} mathrm{C} ) and ( mathrm{D} ) are given below A. 160 ppm B. 35 ppm C. 180 ppm D. 25 ppm The decreasing order of extent of pollution in water is ? ( A cdot C>A>D>B ) B. ( D>B>A>C ) ( c cdot c>A>B>D ) D. D >A > B > C |
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| 202 | Distinguish between Water pollution and land pollution. | 11 |
| 203 | Pollutant which causes acid rain is ( A cdot S O_{2} ) в. ( C O_{2} ) ( c cdot c o ) D. Hydrocarbons |
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| 204 | Q.14 Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes ………. (a) enhanced growth of algae (b) decrease in amount of dissolved oxygen in water (c) deposition of calcium phosphate (d) increase in fish population |
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| 205 | Q21. What should be the tolerable limit of F-ions in drinking water? | 11 |
| 206 | Biological importance of ozone layer is: A. ozone layer stops ultraviolet rays B. ozone layer reduces green house effect C. ozone layer reflects radio waves D. ozone layer controls ( O_{2} / H_{2} ) radio in atmosphere |
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| 207 | Instead of monitoring carbon dioxide, another gas that scientists could study to substantiate the fact that ( C O_{2} ) concentration is steadily increasing in the atmosphere is ( O_{2} ). Justify the statement. |
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| 208 | 09. What are the reactions involved for ozone layer depletion in the stratosphere? | 11 |
| 209 | Which of the following reactions is not correct for the formation of acid rain? A. ( N_{2}+O_{2} rightarrow 2 N O ) в. ( 2 N O+O_{2} rightarrow 2 N O_{2} ) c. ( H_{2} O+2 N O_{2} rightarrow H N O_{2}+H N O_{3} ) D. ( N O+O_{2} rightarrow N O_{2} ) |
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| 210 | 190. Which is not correct statement for classical smog? (a) It occurs in cool humid climate (b) It is called oxidizing smog (c) It is called reducing smog (d) It is a mixture of smoke, fog and sulphur dioxide |
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| 211 | The design, development and implementation of chemical products and process to reduce or eliminate the use and generation of substances hazardous to human health and environment is called A. Green Revolution B. Green Chemistry c. Environmental Chemistry D. waste Management |
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| 212 | 3. Which of the following gases cause acid rain ? (a) Ammonia (b) Hydrogen (c) Oxides of Nitrogen (d) Sulphur dioxide |
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| 213 | Which gas can cause acid rain in nearby places and air pollution in downwind areas from the volcanic site? ( A cdot S O_{2} ) в. ( H_{2} S ) ( c cdot C O_{2} ) D. All of the above |
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| 214 | Which of the following is/are the main agents of soil erosion? A) Wind and water B) Rocks c) sand ( A cdot A ) B. A & B ( c cdot B & C ) D. A, B, C |
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| 215 | What are pesticides and herbicides? Explain with examples. | 11 |
| 216 | 199. In winter season, special type of clouds called polar stratospheric clouds are formed over Antarctica. As a result, less depletion of ozone layer takes place due to reactions (a) CIONO, +H, HOCI + HNO, (b) CIONO2 + HCl + Cl2 + HNO3 (c) Both (a) and (b) (d) None of the above |
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| 217 | 47. Environmental pollution can be controlled by: (1) Checking atomic blasts (2) Manufacturing electric vehi- cles (3) Sewage treatment (4) All of the above |
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| 218 | The first inorganic pesticide to be used commercially was A. Bordeaux mixture B. Burgandy mixture c. D.D.T. D. 2-4 D |
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| 219 | 1. CO in the atmosphere is due to (a) incomplete combustion of petroleum fuels (b) oxidation of carbon (coke) in metallurgical extraction of metals (c) thermal power plants (d) All of the above |
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| 220 | To manufacture computer chips, many chemicals, large amounts of water, and energy are required which is harmful to environment. a process is discovered which significantly reduces the quantities of chemicals, energy, and water needed to produce chips. This is an application of: A. Green chemistry B. waste management c. revolution resource recovery D. Green revolution |
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| 221 | Given below is the cascade of events following deforestation. Select the option which arrange them in the correct sequence. ( P: ) Erosion of top soil Q: River channel become shallow. R : Eroded soil gets deposited on the river bed as silt S : Destruction of crops leads to starvation. T : Shallow channels cannot hold excess water during rain and hence cause flood U: Floods damage agricultural crops. A. ( P rightarrow Q rightarrow R rightarrow S rightarrow T rightarrow U ) в. ( P rightarrow R rightarrow Q rightarrow T rightarrow U rightarrow S ) ( c cdot Q rightarrow R rightarrow P rightarrow S rightarrow T rightarrow U ) D. ( P rightarrow T rightarrow U rightarrow Q rightarrow R rightarrow S ) |
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| 222 | 114. When chlorine is added to water before it enters the distribution system is known as (a) post-chlorination (b) pre-chlorination (c) plan-chlorination (d) break point-chlorination |
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| 223 | Unseasonal rains and cyclones are the results of: A. global warming B. acid rain c. increase of water pollution D. increase of ( C O ) |
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| 224 | Water samples with ( B O D ) values of ( 4 p p m ) and ( 18 p p m, ) respectively, are: A. highly polluted and clean B. highly polluted and highly polluted c. clean and highly polluted D. clean and clean |
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| 225 | Match the Column I and Column II and choose the correct code given below. Column I (A) Peroxyacetyl nitrile (i) Waste incineration (B) Indigo (ii) Vat dye (C) IR active (iii) Global warming molecules (D) Dioxins (iv) Photochemical ( operatorname{smog} ) ( A cdot A-(i v) ; B-(i i) ; C-(i i i) ; D-(i) ) B. A-(i); B-(ii); C-(iv); D-(iii) C. ( A-(i i) ; B-(i) ; C-(i v) ; D-(i i i) ) D. A-(iv); B-(i); C-(iii); D-(ii) |
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| 226 | How water gets polluted? How the pollution can be minimised? |
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| 227 | 143. The ‘green’ chemical used in household cleaners to remove stains and also a favourite dressing on salads is (a) hydrochloric acid (b) citric acid (c) vinegar (d) water |
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| 228 | If water is polluted, its BOD (biochemical oxygen demand) value is: ( A .<1 mathrm{ppm} ) B. <2 ppm ( c .<3 p p m ) ( D ldots 6 ) ppm |
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| 229 | Q2. Explain the tropospheric pollution in 100 words? | 11 |
| 230 | 150. In a country, following suggestions/ processes are being strictly followed: (1) Liquefied co, instead of C1,C = CCl, for dry cleaning (II) H,O, instead of So, and Cl, for bleaching of papers and clothes. (III) Biodiesel instead of normal refinery diesel for automobiles. Which of the above are under green chemistry? (a) I, II and III (b) Both I and II (c) Both I and III (d) Both II and III |
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| 231 | Green house effect of global warming causes: A. rise in temperature of earth B. rise in pressure on earth c. decrease in oxygen content earths atmosphere D. decrease in ( C O_{2} ) content |
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| 232 | is the deterioration (destruction) of the earths land surfaces, often directly or indirectly as a result of mans activities and their misuse of land resources. A. Land pollution B. Soil erosion c. Deforestation D. Enrichment of soil |
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| 233 | Carbon monoxide emitted by automobiles prevents transport of oxygen in body due to: A. its combination with oxygen to form carbon dioxide B. break down of haemoglobin c. preventing haemoglobin to form oxyhaemoglobin D. formation of free radicals in the blood |
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| 234 | Eutrophication is a A. Neutral sign for ecosystem B. Dual-sided sign for ecosystem C. Bad sign for ecosystem D. Good sign for ecosystem |
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| 235 | Which gas is responsible for the depletion of ozone layer? A. Carbon dl oxide B. Methane c. cluroflorocarbon D. Sulphur di oxide |
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| 236 | .30 From where does ozone come in the photochemical smog? pition of NO into NO and Ane SE |
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| 237 | can cause sea levels to rise dramatically. A. Global warming B. Rock slide c. water pollution D. None of the above |
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| 238 | Read the following statements carefully 1. Photochemical smog always contains ozone 2. The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen. 3. Lead is the most hazardous metal pollutant of automobile exhaust. Which of the above statements is not true? A. B. 2 ( c .3 ) D. None of these |
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| 239 | What is ozone depletion? | 11 |
| 240 | Classical smog is also called as A. London smog B. sulphurous acid smog c. Both ( A ) and ( B ) D. Los angles smog |
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| 241 | Bioamplification is due to: A. increase in the concentration of pesticides in water B. gradual accumulation of pesticides from lower animals to higher animals C . gradual decrease in concentration of pesticides in ( mathrm{H}_{2} mathrm{O} ) D. increase in space of biosphere |
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| 242 | Match the Lists I and II and pick the correct matching from the codes given below. List I (i) Peroxy acetyl nitrate 1. Carcinogens (ii) Polycyclic aromatic ( quad ) 2. Global warming hydrocarbons 3. Photochemical (iii) IR active molecules 4. Waste (iv) Dioxins ( quad ) incineration A. ( (i)-3, ) (ii) ( -1, ) (iii) ( -4, ) (iv) -2 B. (i) – 3, (ii) – 2, (iii) – 4, (iv) – 1 C. (i) – 3, (ii) – 1, (iii) – 2, (iv) – 4 D. (i) – 4, (ii) – 2, (iii) – 1, (iv) – 3 |
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| 243 | Most insecticides attack upon insects on their A. Digestive system B. Reproductive system c. Nervous system D. Respiratory system |
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| 244 | Faraday has developed a plating process to make high-performance chrome coatings from trivalent chromium instead of highly toxic hexavalent chromium. This is an application of: A. Green revolution B. Green chemistry c. waste management D. revolution resource recovery |
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| 245 | Define a) Dalapon b) Metolachlor | 11 |
| 246 | 26. Which of the following statements is true? (a) London smog is oxidising in nature. (b) London smog contains H, SO, droplets. (c) London smog is mixture of smoke, fog and SO, (d) London smog causes bronchitis. |
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| 247 | The rain mixed with sulphuric acid is called as A. Acid rain B. Alkaline rain c. Neutral rain D. None of these |
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| 248 | Q. 16 The consequences of global warming may be …….. (a) increase in average temperature of the earth (b) melting of Himalayan Glaciers (c) increased biochemical oxygen demand (d) eutrophication |
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| 249 | Which layer of the atmosphere contains the ozone layer? A. Stratosphere B. Troposphere c. Exosphere D. Mesosphere |
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| 250 | What is the concentration above which sulphate causes laxative effect? ( A cdot 500 ) ppm B. 500 ppb c. 100 ppm D. 100 ppb |
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| 251 | 22. SO, can be removed by using the following SO, +2H, S 2H,0+ 3S SO2 + Na,SO3 + H20-→ 2NaHSO3 This is called (a) synergistic process wololo do (b) non-regenerative process (c) desulphonation process (d) regenerative process |
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| 252 | Why does Mathura refinery pose problems to the Taj Mahal? | 11 |
| 253 | Which one of the following methods is most appropriate to check soil erosion on steep slopes? A. Shelter belts B. Mulching c. Terrace cultivation D. Multi-river project |
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| 254 | 125. An example of chemical toxics is (a) removing water from industrial reactions (b) utilizing ammonia instead of vinegar (c) eliminating the formation of chlorinated organics in paper (d) storing BPA (Bis-phenol A) in plastic bottles |
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| 255 | Q11. What is siltation? | 11 |
| 256 | “Sporeine” is used to control A. Bacterial pathogen B. Fungal pathogen c. Nematodes D. Insects pest |
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| 257 | Acid rain is produced by: A. excessive release of CO in air B. excessive release of ( S O_{2} ) and ( H_{2} S ) in air C . excessive release of ( N O_{2} ) and ( S O_{2} ) in air D. excessive release of ( N H_{3} ) and ( C O_{2} ) in air |
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| 258 | ( C O_{2} ) goes to air, causes green house effect and gets dissolved in water. What will be the effect on soil fertility and ( p H ) of the water? A. Increase B. Decrease c. Remain same D. None of these |
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| 259 | Biological importance of ozone layer is: A. it stops ultraviolet rays B. ozone layer reduces green house effect C. ozone layer reflects radio waves D. ozone layer controls ( O_{2} / H_{2} ) ratio in atmosphere |
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| 260 | In Greece and Italy, marble statues were damaged by: ( A cdot operatorname{smog} ) B. acid rains c. eutrophication D. leakage of ( C l_{2} ) |
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| 261 | troposphere region 214. Variation of temperature (1) in the troposphere with height (km) is (a * * 0 2 8 4 6 km- 10 ) betyg T (6) 0 2 8 10 4 6 km X 0 2 4 6 km 8 10 to trollol odsto (d) 0 2 4 6 8 km-b 10 na ila bon |
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| 262 | Which of the following is not a refrigerant? A. ( C H C l F_{2} ) в. ( N H_{3} ) c. Ether D. ( C_{2} H_{4} ) |
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| 263 | The aromatic compounds present as particulates are : A. Polycyclic aromatic hydrocarbons B. Benzene c. Toluene D. Nitrobenzene |
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| 264 | The fuel obtained by decomposing sludge is: A. biogas B. petrol c. diesel D. kerosene |
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| 265 | 134. An example of green chemistry is (a) recycled carpet (b) a product made on Earth’s Day (c) bioplastics or biodiesel (d) a sublimation reaction |
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| 266 | Which of the following practices involve green chemistry? (i) Substitute CFCs by environmental friendly HFCs and other compounds. (ii) Replace halogenated solvent by liquid ( C O_{2} ) for drycleaning. (iii) Use of ( boldsymbol{H}_{2} boldsymbol{O} ) for bleaching instead of ( C l_{2} ) (iv) Making disposable eating utensils and storage jars of plastics. ( A ). (i) and (ii) B. (ii) and (iv) c. (iii) and (iv) D. (i), (ii) and (iii) |
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| 267 | Addition of phosphates and nitrates/fertilizers into water leads to A. Increased algal growth B. Nutrient enrichment/ eutrophication c. Increased growth of decomposers D. Reduced algal growth |
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| 268 | The pair of gases responsible for acid rain are: A. ( H_{2}, O_{3} ) в. ( C H_{4}, O_{3} ) c. ( N O_{2}, S O_{2} ) D. ( C O, C H_{4} ) |
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| 269 | 35. Iron and manganese are removed in water by the process of: (1) Chlorination (2) Filtration (3) Lime-soda treatment (4) Aeration |
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| 270 | Which of the following compounds are toxic? A. Benzene B. Toluene c. Carbon tetrachloride D. All of the above |
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| 271 | The secondary precursors of photochemical smog are: A. ( S O_{2} ) and ( N O_{2} ) B. ( N O_{2} ) and hydrocarbons ( mathrm{c} cdot O_{3} ) and hydrocarbons D. ( C O_{2} ) and ( O_{2} ) |
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| 272 | Which type of biological waste effect soil? A. Urine B. Feces c. Both a and ( b ) D. None of these |
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| 273 | Q4. Which gases are responsible for greenhouse effect? List some of them. | 11 |
| 274 | Compost is being used for all of the following except: A. landfill cover B. landscaping c. low grade fertilizers D. agricultural field |
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| 275 | What does Green Chemistry in terms of environment mean? A. Greenhouse effect B. Reaction related to depletion of ozone layer c. Photosynthetic reactions in plants D. Reduction in the use and production of hazardous chemicals |
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| 276 | Consider the following statements: 1. The Government of India had launched an initiative to study the phenomenon of black carbon, commonly known as soot. 2. Black carbon is a form of particulate air pollution, produced from incomplete combustion of biomass burning, cooking with solid fuels and diesel exhaust. 3. The National Black Carbon Programme is the joint effort of the Ministry of Environment, Earth Sciences, Science end Technology and ISRO. Which of the statements given above is/are correct? |
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| 277 | 69. Air pollutants that produce photochemical oxidants include: (a) CO2, CO and So, (b) NO, NO and HNO, (c) 0,, Cl, and HNO3 (d) 03, Cl, and SO, |
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| 278 | 232. Carcinogenic pollutants are (a) PCBs (b) benzene (c) Both (a) and (b) (d) None of these |
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| 279 | 47. Cloud burst means (1) Formation of artificial rain (2) Abnormally heavy down- pour of rain, associated with thunderstorm (3) Presence of scattered flakes of cloud in the sky (4) Sowing of seeds of a crop in a cloudy weather |
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| 280 | . 42 Assertion (A) Carbon dioxide is one of the important green house gases. Reason (R) It is largely produced by respiratory function of animals and plants. (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 Rare not correct (d) A is not correct but R is correct |
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| 281 | How soil erosion is a cause of soil pollution? A. By decreasing area of productive land. B. By increasing area of productive land. C. By decreasing area of land. D. By decreasing area of non-productive land. |
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| 282 | Phosphate pollution is caused by: A. weathering of phosphate rocks only B. agriculatural fertilizers only C . phosphate rocks and sewage D. sewage and agricultural fertilizers |
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| 283 | The COD values of three water samples ( A, B ) and ( C ) are 60 ppm, 990 ppm and 120 ppm respectively. The most polluted water sample is: ( A cdot A ) B. B ( c cdot c ) D. All are equally polluted |
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| 284 | The herbicide DCMU kills the weeds because it inhibits A. respiration B. ( C O_{2} ) fixation c. cell division D. ( N O_{3}^{2-} ) uptake |
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| 285 | Chief source of soil and water pollution is: A. mining B. agro industry c. thermal power plant D. all the three |
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| 286 | How industrial effluents effects soil pollution? A. By decreasing its fertility B. By decreasing its water absorbing capacity c. By increasing its fertility D. Both A and B |
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| 287 | Which of the following reaction occur when urea is added to soil as a fertilizer? A. ( N H_{2} C O N H_{2} longrightarrow H N C O+N H_{3} ) B. ( N H_{2} C O N H_{2}+H_{2} O longrightarrow 2 N H_{3}+C O_{2} ) c. ( 2 N H_{2} C O N H_{2} longrightarrow H_{2} N C O N H C O N H_{2}+N H_{3} ) D. Both 1 and 2 |
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| 288 | Flouride in drinking water causes harmful effect on bones and teeth when its concentration becomes: A. greater than 10 ppm B. less than 1 ppm c. greater than 15 ppm D. greater than 2 ppm |
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| 289 | Which of the following pollutants cannot be degraded by natural process? A . DDT B. Nuclear Waste c. Heavy Metalss D. All of the above |
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| 290 | The two gases making the highest relative contribution to the greenhouse gases are: A ( cdot C O_{2} ) and ( C H_{4} ) B. ( C H_{4} ) and ( N_{2} O ) c. ( C F C s ) and ( N_{2} O ) D. ( C O_{2} ) and ( N_{2} O ) |
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| 291 | The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water, is called A. BOD в. АВЕ ( c cdot cos ) D. standard amount of oxygen |
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| 292 | Whenever practicable, synthetic methods should be designed to use and generate substances that are little or not toxic to human health and environment, is an objective of: A. waste management B. green chemistry c. air pollution D. green revolution |
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| 293 | 94. Which of the following is the coldest region of atmosphere? (a) Thermosphere (b) Troposphere (C) Mesosphere (d) Stratosphere |
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| 294 | ( p H ) of the rain is increased in heavy industrial area due to: ( A cdot ) acid rain B. land pollution c. water pollution D. none of the above |
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| 295 | Soap and detergents are the source of organic pollutants like A. Glycerol B. Polyphosphates c. Sulphonated hydrocarbons D. All of these |
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| 296 | Q20. For your agricultural field or garden you have developed a compost producing pit. Discuss the process in the light of bad odour, flies and recycling of wastes for a good produce. |
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| 297 | 147. Which of the following statements about polar stratosphere clouds (PSCs) is not correct? (a) PSCs do not react with chlorine nitrate and HC1 (b) Type I clouds are formed at about -77°C and contain solid HNO3.3H,0 (c) Type II clouds are formed at about – 85°C and contain some ice (d) A tight whirlpool of wind called polar vortex is formed which surrounds Antarctica |
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| 298 | 5. The biggest particulate matter is (a) HNO2 droplets (b) Fly ashodno (c) H,SO, droplets (d) Soot |
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| 299 | Name of the chemical responsible for destructive of the ozone layer. Start the main chemical from these chemicals which is responsible for more then ( 80 % ) onzen depletion. Start the man -made applications which make of the chemical |
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| 300 | If ( C C l_{3} F ) is present in the stratosphere, it will react with which of the following: A) Ozone ( begin{array}{ll}text { B) } N_{2} & text { C) } C O_{2}end{array} ) ( A cdot A ) B. B c. ( A & B ) ( D cdot c & A ) |
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| 301 | Smoke is a form of wet deposition of acid rain. True or false? A. True B. False |
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| 302 | Soil contains A. Air and water B. Water and plants C. Minerals, organic matter, air and water D. Water, air and plants |
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| 303 | What is Green Chemistry? | 11 |
| 304 | 63. The medium present in the environment which consumes some amount of certain pollutant is called a (a) sink (b) target (c) receptor (d) none of these |
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| 305 | at species IR ISTIUSO Q. 28 A factory was started near a village. Suddenly villagers started feeling the presence of irritating vapours in the village and cases of headache, chest pain, cough, dryness of throat and breathing problems increased. Villagers blamed the emissions from the chimney of the factory for such problems. Explain what could have happened. Give chemical reactions for the support of your explanation. |
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| 306 | 191. Which of the following is the primary precursor of photochemical smog? (a) Hydrocarbon (b) Ozone (c) PAN (d) Water vapour |
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| 307 | 51. The uppermost region of the atmosphere is 07- (a) stratosphere (b) exosphere onda (c) troposphere (d) ionosphere |
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| 308 | Which of the following is a measurement of water pollution? A . PSC в. РСВ ( c . ) во D. coo |
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| 309 | The toxic chemicals from industries released in water lead to: A. change in the color of water B. eutrophication c. change in the temperature of water D. all of above |
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| 310 | Maximum prescribed limit of ( Z n ) in drinking water is: ( A cdot 1 ) ppm B. 10 ppm c. 4 ppm D. 5 ppm |
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| 311 | Ultraviolet radiation is absorbed by? A. exosphere B. ionosphere c. ozonosphere D. stratosphere |
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| 312 | 93. Which of the following in not an example of green chemistry? (a) Reacting methylamine and phosgene to produce methyl isocyanate (b) Replacement of CFCs by Co, as blowing agent in the manufacture of polystyrene foam sheets (c) Catalytic dehydrogenation of the diethanol amine without using cyanide and formaldehyde (d) Replacement of organotins by ‘sea-nine’as antifouling compound in sea marines. |
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| 313 | 140. Green chemists reduce risk by (a) inventing technologies that will clean up toxic sites (b) minimizing the use of all chemicals (c) reducing the hazard inherent in a chemical product or risk (d) developing recycled products |
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| 314 | Untreated domestic sewage has a low: A. BOD value B. % of dissolved ( 0_{2} ) c. amount of dissolved salts D. value of suspended organic matter |
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| 315 | Phytotron is A. A controlled condition chamber for plants B. Leaf culture process C . Special culture of seeds D. Root culture process |
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| 316 | How is population density calculated? | 11 |
| 317 | Give any two reasons for land degradation. |
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| 318 | 115. The amount of chlorine available in water after disinfection is called (a) free chlorine (b) free available chlorine (C) residual chlorine (d) combined available chlorine |
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| 319 | 79. Which city is not the part of Taj Trapezium? (a) Agra (b) Faridabad (c) Mathura (d) Firozabad |
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| 320 | 141. Which of the following is a challenge for green chemists? (a) Knowing when to reduce and eliminate hazardous waste (b) Developing chemicals that are recyclable (c) Training of cleaning up chemical spills (d) Awareness of the benefits of green chemistry |
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| 321 | Which of the following is a sink for CO? A. Haemoglobin B. Microorganism presence in the soil c. Ocean D. Plant |
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| 322 | the second layer of the atmosphere reaches ( 48 mathrm{km} ) above the earth’s surface. | 11 |
| 323 | Q.5 Which of the following statement(s) is/are wrong? (a) Ozone is not responsible for green house effect (b) Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur trioxide (c) Ozone hole is thinnig of ozone layer present in stratosphere (d) Ozone is produced in upper stratosphere by the action of UV rays on oxygen maible for aronnhance fact Its contribution is about god |
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| 324 | Name the two important non-metallic oxides which causes acid rain. | 11 |
| 325 | Solvents used to dry clean clothes are usually ( C_{2} C l_{4} . ) A substitute has been discovered which is environmental friendly is an application of A. Green revolution B. Green chemistry c. waste management D. Revolution resource recovery |
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| 326 | The greenhouse effect is possible if the percentage of ( boldsymbol{C O}_{2} ) is : A . 0.01 % B. 0.03 % c. ( 0.15 % ) D. 0.02 % |
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| 327 | Which soil is red in colour? A. Multani soil B. Shadu soil c. Terracotta soil D. Kaolin (china clay) |
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| 328 | Water is often treated with chlorine to: A. cause sedimentation B. remove insoluble impurities c. increase oxygen content D. kill Germs |
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| 329 | What is so important about the troposphere? A. Layer of water at or near Earths surface B. Contains ozone c. It contains weather and the oxygen that we breath D. All of the above |
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| 330 | Which of the following disease increase due to greenhouse effect? A. Malaria B. Dengue c. Yellow Fever D. All of the above |
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| 331 | Which of the following is not primary pollutant? ( A cdot S O_{2} ) в. ( H_{2} S ) c. ( C O ) ( mathrm{D} cdot mathrm{SO}_{3} ) |
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| 332 | Acid rain is caused by A. emission of gases from industries B. air pollutants C. both (A) and (B) D. none of above |
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| 333 | Q. 40 Assertion (A) The pH of acid rain is less than 5.6. Reason (R) Carbon dioxide present in the atmosphere dissolves in rain water and forms carbonic acid. (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 e t stotinaf |
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| 334 | 83. Acid rain is specified when pH is (a) between 6 and 7 (b) between 7 to 9 (c) below 5.6 (d) above 9 |
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| 335 | Q15. What are pesticides and herbicides? Explain giving examples. | 11 |
| 336 | What are bio-hard and bio-soft detergents? Give one-one illustration of each. |
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| 337 | Soil pollution is the outcome of A. deforestation B. pesticides and herbicides c. industrial waste D. all of above |
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| 338 | The ‘blue baby’ syndrome is related to A. Excess of TDS (total dissolved solid) B. Excess of chloride c. Methemoglobin D. Excess of dissolved oxygen |
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| 339 | As proved by many studies, the greenhouse effect is rapidly increasing because of increase in the concentration of carbon dioxide. In the given graph, the increase in carbon dioxide concentration is shown.What could be ( X ) corresponding to it? (i) Rate of photosynthesis in plants (ii) ( p H ) of the oceans (iii) Water level of ocean (iv) Average global temperature of earth A. (i) and (iii) B. (ii) and (iv) C . (ii) only D. (iv) only |
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| 340 | Urea is preferred to ammonium sulphate soluble in water as a nitrogenous fertilizer because: A. it is more soluble in water B. it is cheaper than ammonium sulphate C. it is quite stable D. it does not cause acidity in the soil |
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| 341 | Q1. Define environmental chemistry? | 11 |
| 342 | Lung diseases are four times more in urban areas than in rural areas. This is due to the presence of: ( A cdot S O_{2} ) в. ( C O_{2} ) c. ( N_{2} ) D. water vapour |
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| 343 | The dissolution of ozone layer cause ozone hole in the blanket surrounding the atmosphere. What the ill effects of ozone hole? A. Greenhouse effect B. Global warming c. Acid rain D. UV rays reaching the earth. |
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| 344 | Polythene is which type of waste? A. Domestic B. Industrial c. Chemical D. None of these |
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| 345 | State True or False. Use of herbicides and pesticides should be reduced to prevent soil pollution. A. True B. False |
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| 346 | Q. 36 Match the pollutant(s) in Column I with the effect(s) in Column II. Column 1 Column II A. Oxides of sulphur 1. Global warming B. Nitrogen dioxide 2. Damage to kidney C. Carbon dioxide 3. “Blue baby syndrome D Nitrate in drinking water 4. Respiratory diseases Lead 5. Red haze in traffic and congested areas JON |
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| 347 | A water sample has ppm level concentration of following anions ( boldsymbol{F}^{-}=mathbf{1 0} ; boldsymbol{S} boldsymbol{O}_{4}^{2-}=mathbf{1 0 0} ; boldsymbol{N} boldsymbol{O}_{3}^{-}=mathbf{5 0} ) The anion/anions that make/makes the water sample unsuitable for drinking is/are: A. both ( S O_{4}^{2-} ) and ( N O_{3} ) B . only ( F^{-} ) C . only ( S O_{4}^{2} ) D. only ( N O_{3}^{-} ) |
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| 348 | Which one of the following is not a green-house gas? A. ( C O_{2} ) в. ( N_{2} ) О ( c cdot O_{3} ) D. ( N_{2} ) |
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| 349 | What do you do in the following situations : (a) Exposed to exhaust fumes in traffic. (b) Exposed to a series of fire crackers with high sound level. (c) Get turbid drinking water during monsoon. |
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| 350 | The amount of oxygen required to oxidise organic substances present in water is called: A. Dissolved oxygen (DO) B. Chemical oxygen demand (COD) c. Biochemical oxygen demand (BOD) D. The threshold limit value (TLV) |
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| 351 | What do you mean by green chemistry? How will it help decrease environmental pollution? |
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| 352 | 156. Which of the following statements is not true about classical smog? (a) It contains compounds of reducing nature (b) It is produced in cold and humid climate (c) Its main components are produced by the action of sunlight on emissions of automobiles and factories (d) It contains smoke, fog and SO, |
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| 353 | The presence of which of the following gases in air checks the ultraviolet from sun light? ( A cdot S O_{2} ) в. ( C O_{2} ) c. ( N O ) D. ( O_{3} ) |
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| 354 | Assertion(A): Smaller particles (size <5 microns) cause fibrosis of the lung lining. Reason (R): They are more likely to penetrate into the lungs. A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not correct explanation of c. ( A ) is true and ( R ) is false D. A is false and R is true. |
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| 355 | Which of these are particulates? A. Dust and fumes B. Fly ash and smoke c. Mist and fumes D. All of these |
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| 356 | Carbon footprint is the amount of carbon dioxide released into the atmosphere because of human activities. By which of the following ways we can reduce the carbon footprint? A. By keeping an electrical device on standby mode when not in use B. Print on single side of paper instead of writing c. Use of CFLs in daytime and bulbs in night to study D. Use of public transport or carpool wherever and whenever we can |
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| 357 | Q. 33 Some time ago formation of polar stratospheric clouds was reported over Antarctica. Why were these formed? What happens when such clouds break up by warmth of sunlight? |
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| 358 | 97. The region which is greatly affected by air pollution is (a) Troposphere (b) Stratosphere (c) Thermosphere (d) Mesosphere HD |
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| 359 | Assertion : Pyrethrum is collected from th e leaves of Chrysanthemum cinerarifolium. Reason Pyrethrin is prepared from pyrethrum. |
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| 360 | What is the effect of soil erosion in our country? |
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| 361 | 7. Formation of London smog takes place in (a) Winter during day time (b) Winter during morning time (c) Summer during day time (d) Summer during morning time |
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| 362 | Photochemical smog does not contain A. PAN B. Ozone c. Nitrogen dioxide D. ( S O_{2} ) |
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| 363 | When pollutants in the air mix up in a chemical reaction, they form an even more dangerous chemical.these pollutants are called A. primary air pollutant B. secondary air pollutant c. tertiary air pollutant D. none of above |
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| 364 | 27. Ozone layer of stratosphere required protection from indiscriminate use of (a) Balloons (b) Pesticides (c) Aerosols and high flying jets (d) Atomic explosions |
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| 365 | List out the major air pollutants. | 11 |
| 366 | Q8. Name the acids which are responsible for acid rain? | 11 |
| 367 | 6. The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was: (a) Ammonia (b) Phosgene (c) Methylisocyanate (d) Methylamine |
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| 368 | 0.25 What are the sources of dissolved oxygen in water? | 11 |
| 369 | Q5. (a) Define eutrophication and pneumoconiosis. (b) Write difference between photochemical and classical smog. bo |
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| 370 | Which one causes photochemica smog? ( A cdot O_{3}, ) PAN and ( N O_{2} ) B. ( O_{3} ), PAN and ( C O ) c. HCN, NO and PAN D. ( O_{2} ), PAN and ( N O_{2} ) |
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| 371 | 194. Select the correct statement(s). (a) PAN is formed in a chain reaction (b) PAN is a product of photochemical smog (c) NO, contributes to haze (d) All of the above are correct statements |
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| 372 | Which of the following can be used for controlling Gaseous Pollutant? A . Arrestor B. Incineration c. Absorption D. None of above |
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| 373 | Afforestation and reforestation is a measure mainly to control A. soil pollution B. water pollution c. thermal pollution D. none of above |
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| 374 | Plastics being developed from ecofriendly renewable sources, plus some modern plastics are biodegradable is one of the achievements of A. Green revolution B. Waste management c. Revolution resource recovery D. Green chemistry |
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| 375 | Mark the example which in not correctly matched? A. Air pollutants – Oxides of sulphur, nitrogen and carbon B. Particulate pollutants – Dust, mist fumes C. Global warming – Methane, ozone, CFCs D. Water soluble chemical pollutants – Oxides of nitrogen, carbon and sodium |
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| 376 | 129. Which of the following is the greenest solvent? (a) Formaldehyde (b) Benzene (c) Water (d) Ethanol |
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| 377 | Which of following heavy metals does not belong to a category of chemical pollutants? A. ( C d ) в. ( H g ) c. ( N i ) D. ( F e ) |
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| 378 | Q. 27 Why does water covered with excessive algae growth become polluted? | 11 |
| 379 | Which one of the following is responsible for the soil erosion in farms? A. Rivers and wind work B. Defective methods of farming c. Flowing water D. Moving glaciers |
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| 380 | 6. Ozone depletion is mainly due to (a) HCFS (b) CFCs (c) CHBr (d) all of the above 7 The nelltant talased Re d |
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| 381 | Largest group of insecticide of plant origin are A. Organochlorines B. Triazines c. Pyrethroids D. Carbamates |
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| 382 | Which of the following is not a cause of acid rain? A. Burning of fossil fuels B. Bacterial decomposition of organic matter c. Internal combustion engines D. None of the above |
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| 383 | 179. Cyanides (CN) in industrial waste are quite poisonous to aquatic life. With Ni2+, a stable complex is formed which is not toxic as cyanide Ni2+ + 4CN –> [Ni(CN)41- Poisonous Non-toxic The term is explained by (a) antagonism (b) synergism (c) eutrophication (d) None of these |
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| 384 | CIPIUL DUC PA J E Q4. What do you mean by greenhouse effect? What is the role of Co, in the greenhouse effect? the boot from the sun and |
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| 385 | Q. 23 During an educational trip, a student of botany saw a beautiful lake in a village. She collected many plants from that area. She noticed that villagers were washing clothes around the lake and at some places waste material from houses was destroying its beauty. After few years, she visited the same lake again. She was surprised to find that the lake was covered with algae, stinking smell was coming out and its water had become unusable. Can you explain the reason for this condition of the lake? |
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| 386 | Q. 50 For dry cleaning, in the place of tetrachloroethane, liquified carbon dioxide with suitable detergent is an alternative solvent. What type of harm to the environment will be prevented by stopping use of tetrachloroethane? Will use of liquified carbon dioxide with detergent be completely safe from the point of view of pollution? Explain. . |
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| 387 | Global warming is due to greenhouse effect. The greenhouse gas include: ( A cdot C O_{2} ) B. Oxides of nitrogen ( c cdot ) Both a ( & b ) D. None of the above |
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| 388 | Which layer protects us from harmful ultraviolet rays of the sun? A. First layer B. Second layer c. Ozone layer D. Exosphere |
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| 389 | Look at the picture. What is this item made of? A. Leather B. Glass c. Rubber D. Plastic |
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| 390 | 17. Which forms the part of hazy fumes of photochemical smog? (a) SO, (b) Aldehydes (C) PAN formation (d) Nitrogen dioxide |
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| 391 | What is the population of these states? (i) Sikkim (ii) Lakshadweep |
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| 392 | The upper stratosphere consisting of the ozone layer protects us from the sun’s radiation that falls in the wavelength region of: A. ( 600-750 mathrm{nm} ) B. ( 0.8-1.5 mathrm{nm} ) ( c .400-550 mathrm{nm} ) ( m ) D. 200 – 315 nm |
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| 393 | 60. Oxides of nitrogen (a) are toxic to living tissues (b) cause respiratory diseases in children (c) retard the rate of photosynthesis o (d) causes all of these ma |
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| 394 | Waste water from industries should not be used for irrigation without eliminating toxic chemicals from the effluent. This is a measure to control A. air pollution B. water pollution c. soil pollution D. none of above |
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| 395 | Q. 35 Match the terms given in Column I with the compounds given in Column II. Column 1 Column II A. Acid rain 1. CHCI-CHFZ B. Photochemical smog 2. CO C Combination with haemoglobin 3. CO2 D. Depletion of ozone layer 4. SO 5. Unsaturated hydrocarbons OD |
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| 396 | 125. In India, rules of Green Chemistry are governed by (a) IGT (b) RGT (c) NGT (d) SGT |
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| 397 | 29. Which of the following fuels caus- es minimum environmental pol- lution ? (1) Kerosene (2) Diesel (3) Coal (4) Hydrogen |
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| 398 | e. 13 Which of the following conditions shows the polluted environment? (a) pH of rain water is 5.6 (b) Amount of carbon dioxide in the atmosphere is 0.03% (c) Biochemical oxygen demand 10 ppm (d) Eutrophication |
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| 399 | Which of the following reactions is taking place resulting in discolouration of marble of the buildings like Taj Mahal? A ( cdot C a C O_{3}+H_{2} S O_{4} rightarrow C a S O_{4}+H_{2} O+C O_{2} ) в. ( C a C O_{3}+H C l longrightarrow C a C l_{2}+H_{2} O+C O_{2} ) ( mathrm{c} cdot mathrm{CaCO}_{3}+mathrm{H}_{2} mathrm{O} rightarrow mathrm{Ca}(O mathrm{H})_{2}+mathrm{CO}_{2} ) D. ( operatorname{CaCO}_{3} rightarrow ) СаО ( + ) СО ( _{2} ) |
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| 400 | Q. 20 Dissolved oxygen in water is very important for aquatic life. What processes are responsible for the reduction of dissolved oxygen in water? |
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| 401 | Q. 3 Which of the following statements is not true about classical smog? (a) Its main components are produced by the action of sunlight on emissions of automobiles and factories (b) Produced in cold and humid climate (c) It contains compounds of reducing nature (d) It contains smoke, fog and sulphur dioxide |
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| 402 | Which type of rain can cause soil pollution? A. Acid rain B. Tropical rain c. Temperate rain D. All of these |
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| 403 | 45. Of the following, which pollutes the air of a big ci (1) Copper (2) Chromium (3) Lead (4) Cadmium |
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| 404 | Region/regions of the atmosphere where temperature decreases with altitude is/are: A. thermosphere B. stratosphere c. troposphere D. ozonosphere |
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| 405 | Green house effect is caused by : A ( . N O_{2} ) в. ( C O ) c. ( N O ) D. ( C O_{2} ) |
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| 406 | Acid rain is due to pollution of A. Dust B. Pesticides c. ( S O_{2} ) and ( N O_{2} ) D. Carbon particle |
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| 407 | 220. The statement which is not true (a) NO, does not play any role in photochemical smog b) SO, is more harmful air pollutant than SO, (c) So, does not affect larynx (voice box) (d) NO is more toxic to living tissues than NO, |
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| 408 | A little amount of fertilizer makes your lawn grow better but a larger amount of the same kills grasses.Why? |
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| 409 | Agriculture can cause soil contamination due to: A. accumulation of animal manures B. illicit dumping of tainted crops on land C. improper sanitation system D. both ( A ) and ( B ) |
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| 410 | A Crane had DDT level of 5 ppm in its body. What would happen to the population of such birds? |
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| 411 | Which of the following is determined by the oxidation of acidified potassium dichromate? A. DO B. BOD ( c cdot cos ) D. TLV |
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| 412 | Depletion of ozone layer causes: A. blood cancer B. Iung cancer c. skin cancer D. breast cancer |
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| 413 | Spraying of DDT produces pollution of A. Air B. Air and water c. Air and soil D. Air, water and soil |
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| 414 | During a thunderstorm, rainwater contains nitric acid. Explain with reaction. |
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| 415 | 154. Which of the following is not involved in the formation of photochemical smog? (a) Hydrocarbon (b) NO (c) SO (d) 0, |
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| 416 | Water can drain easily though A. clayey soil B. loamy soil c. sandy soil D. bricks |
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| 417 | 142. Green chemistry means such reactions which (a) are related to depletion of ozone layer (b) reduce the use and production of hazardous chemicals (C) produce green colour in reactions (d) study the reactions in plants |
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| 418 | Greenhouse gases trap heat in the atmosphere which makes the Earth warmer. Which of these groups consists of greenhouse gases that cause most harm? A. Methane, Carbon dioxide, Nitrous oxide B. Nitrogen, Oxygen, Methane c. Ozone, Carbon monoxide, Helium D. Water vapour, Nitrogen, ( C F C s ) |
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| 419 | 58. Burning of fossil fuels is the main source of which of the following pollutants? bis (a) Nitrogen oxide (b) Nitric oxide (c) Nitrous oxide (d) Sulphur dioxide |
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| 420 | 59. Which of the following is a primary pollutant? (a) PAN (b) CO (c) Aldehydes |
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| 421 | Air is a mixture. Prove this statement. | 11 |
| 422 | Soil profile means A. Composition of the soil B. Texture of the soil C. Layers of the soil D. None of the above |
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| 423 | . 47 Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere, even then carbon dioxide is considered to be responsible for green house effect. Explain why? |
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| 424 | 0. 10 The pollutants which come directly in the air from sources are called primary pollutants. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants? (a) CO (b) Hydrocarbon (c) Peroxyacetyl nitrate (d) NO With tam radila |
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| 425 | Pesticides and fertilizers should be applied on croplands only in limited amounts because it helps in control of A. soil pollution B. water pollution c. thermal pollution D. all of above |
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| 426 | The soil layer is made up of : A. R Horizon B. A Horizon c. B Horizon D. C Horizon |
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| 427 | The gas responsible for causing Bhopal tragedy was: A. methyl isocyanate B. potassium isothiocyanate c. sodium isothiocyante D. ethyl isothiocyante |
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| 428 | Which of the following is not a method for the disposal of hazardous wastes? A. Isv B. Landfills c. Deep-will injection D. Surface impoundments |
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| 429 | Pollution of lakes and rivers affects aquatic life. Fish cannot live in water that has oxygen less than 4 milligrams per liter. Other freshwater aquatic life (including anaerobic bacteria) also cannot survive without adequate oxygen.’BOD’ stands for: A. Biological oxygen demand B. Bacterial oxygen deficit c. Basic oxygen demand D. Building oxygen deposits |
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| 430 | Q5. Which zone is known as ozonosphere? | 11 |
| 431 | Select the correct statements about greenhouse gases: A. Carbon dioxide is the only gas in the atmosphere which causes global warming. B. The greenhouse gases trap heat and do not allow heat to escape into outer space C. Water vapours do not contribute to the greenhouse effect. D. The presence of excessive greenhouse gases in the atmosphere is responsible for global warming. A. A and B B. B and D c. ( c ) and ( B ) D. D and A |
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| 432 | Choose the correct statement(s). This question has multiple correct options A. Aldrin is used as a pesticide. B. The maximum permissible limit of nitrate in water is 50 ppm. C. The maximum permissible limit of fluoride is 6 ppm. D. All of the above |
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| 433 | Match the Column I and Column II and pick the correct matching from the codes given below. |
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| 434 | 64. Photochemical smog is formed in (a) summer during day time (b) summer during morning time (c) winter during morning time (d) winter during day time |
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| 435 | How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability? A. More branching leads to biodegradability B. More branching leads to non-biodegradability C. No effect D. None of these |
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| 436 | Q. 32 Ozone is a gas heavier than air. Why does ozone layer not settle down near the earth? |
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| 437 | Which of the following activity causes water depletion? A. Increasing population B. Increasing industries c. Agricultural activities D. All of the above |
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| 438 | Study the given flowchart and identify ( boldsymbol{K}, boldsymbol{L}, boldsymbol{M} ) and ( boldsymbol{N} ) respectively *Produced from burning of coal and diesel **Given off by petrol engines A. Carbon dioxide, nitrogen oxides, methane, sulphur dioxide B. Carbon monoxide, methane, sulphur dioxide, nitrogen oxides C. Methane, carbon monoxide, carbon dioxide, sulphur dioxide D. Sulphur dioxide, carbon monoxide, methane, nitrogen |
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| 439 | 216. Stone-cancer (as stone-leprosy) of Taj Mahal is due to formation of (a) Cacoz (b) Caso (c) Ca(OH), (d) Ca(HCO,), one) |
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| 440 | The word missing (X) on the left side of the given fi the given figure Green Chemistry Waste Material (X Risk ) Environmental impact Cost (a) enhancing (c) facilitating (b) reducing (d) awareness |
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| 441 | 98. Classical smog occurs in places of: (a) excess CO2 (b) cool and humid (c) warm, dry and sunny(d) excess NH, |
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| 442 | Cutting of trees decreases: A. pollution level B. temperature C. fertility of soil D. carbon dioxide level |
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| 443 | 4. BOD is a measure of (a) Organic pollutant in water (c) Particulate matter in water (b) Inorganic pollutant in water (d) All of the above |
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| 444 | Which of the following water pollutants encourage the formation of algae? A . Insecticides B. Heavy metals c. Plant nutrients D. Sediments |
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| 445 | The treated water has a very low level of organic material and suspended matter. It is discharged into A . sea B. a river or into the ground c. both ( A ) and ( B ) D. none of the above |
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| 446 | Maximum prescribed limit of ( M n ) in drinking water is: A. 0.005 ppm B. 0.05 ppm c. 0.0005 ppm D. 5 ppm |
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| 447 | 105. Which disinfectant cannot be used in drinking water? (a) Potassium permanganate (b) Bleaching powder (c) Chlorine (d) Phenol |
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| 448 | Q. 24 What are biodegradable and non-biodegradable pollutants? | 11 |
| 449 | Use of pesticides decreases water pollution A. True B. False |
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| 450 | is an environment-friendly product and better than halons which are used to extinguish fire. A. Ibuprofen B. Pyrocool c. Carcinogen D. Carbon-dioxide |
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| 451 | 2. Smog is essentially caused by the presence of (a) Oz and N, (b) 0, and N, (c) oxides of sulphur and N, (d) 0, and 03 (AIEEE 2004 |
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| 452 | Water treatment plants should be installed in all A. desert B. residential c. industrial D. none of the above |
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| 453 | Fungi and bacteria grow mostly in A. subsoil B. Top soil c. Bedrock D. All of the above |
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| 454 | The main problem caused by the use of pesticides is A. Their residues persist in water and other components of the environment. B. Mosquitoes have become resistant to DDT. C. They kill silk worm. D. They deform the gills of some fishes. |
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| 455 | Permanent hardness of water may be removed by the addition of: A. sodium carbonate B. alum c. potassium permanganate D. lime |
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| 456 | What is the source of micro-organisms as water pollutant? A. Chemicals used for killing insects, fungi and weeds B. Domestic sewage c. Mining of uranium containing minerals D. chemical fertilizers |
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| 457 | Q. 49 A farmer was using pesticides on his farm. He used the produce of his farm as food for rearing fishes. He was told that fishes were not fit for human consumption because large amount of pesticides had accumulated in the tissues of fishes. Explain how did this happen? |
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| 458 | Which of the following is a measurement of water pollution? A . PSC в. РСВ ( c . ) во D. coo |
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| 459 | Q. 15 The acids present in acid rain are ……… (a) Peroxyacetylnitrate (b) H.CO (c) NHO (d) H2SO4 |
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| 460 | 37. The lowest region of atmosphere in which the human beings along with other organisms live is called (a) stratosphere (b) troposphere (c) trapezium (d) universe |
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| 461 | soil holds highest water capacity A. sandy B. Clayey c. Loamy D. Both A and C |
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| 462 | The correct match is : A. A-2, B-1, C-4, D-5 B. A-3, B-2, C-5, D-1 c. ( A-4, B-3, C-1, D-2 ) D. A-1, B-2, C-4, D-3 |
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| 463 | 233. Presence of which fuel gas in exhaust fumes shows incomplete combustion of fuel? (a) Sulphur dioxide (b) Carbon monoxide and water vapour (c) Carbon monoxide (d) Nitrogen dioxide |
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| 464 | Sketch the cross section of soil and label the various layers. |
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| 465 | What is soil erosion? A. It is the process by which soil is formed B. A harmful process that involves the removal and transport of soil by wind and water C. A natural method of filtering harmful pollutants D. A process often referred to as the greenhouse effect |
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| 466 | The region in atmosphere containing water vapour is: A. thermosphere B. stratosphere c. troposphere D. mesosphere |
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| 467 | Q9. What is BOD? | 11 |
| 468 | Which of the following are responsible for causing acid-rain? A. Oxides of sulphur and carbon dioxide. B. Oxides of nitrogen and carbon monoxide. C. Hydrogen sulphide and carbon dioxide. D. Oxides of sulphur and nitrogen. |
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| 469 | Green chemistry deals with: A. study of plant physiology B. study of extraction of natural products from plants C. detailed study of reactions involved in the synthesis of chlorophyll D. utilization of existing knowledge base for reducing the chemical hazards along with developmental activities E. synthesis of chemical compounds using green light |
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| 470 | Formation of ozone hole is maximum over A. India B. Australia c. Antarctica D. Europe |
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| 471 | Which of the following is major sink for carbon monoxide? A. water B. Soil c. Animal respiration D. Salts dissolved in ocean water |
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| 472 | What causes the global warming? A. Burning of fossil fuels B. Deforestation c. Industrialization D. All of the above |
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| 473 | Q14. Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution? |
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| 474 | Soil has five components. The proportions of different components are A. Mineral Matter- ( 40 % ), Organic Matter- ( 10 % ), Soil Moisture ( -25 % ), Soil Atmosphere ( -25 % ), Soil OrganismVariable B. Mineral Matter- ( 40 % ), Organic Matter- ( 10 % ), Soil Moisture ( -25 % ), Soil Atmosphere ( -25 % ), Soil Organism( 10 % ) C. Mineral Matter- ( 40 % ), Organic Matter- ( 10 % ), Soil Moisture ( -35 % ), Soil Atmosphere ( -25 % ), Soil Organism( 10 % ) D. Mineral Matter-30%, Organic Matter-20%, Soil Moisture ( -25 % ), Soil Atmosphere ( -25 % ), Soil Organism( 10 % ) |
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| 475 | Write the future products of Green chemistry. |
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| 476 | Q. 31 How is ozone produced in stratosphere? | 11 |
| 477 | Which chemical substance is a greenhouse gas that scientists link to global climate change? This question has multiple correct options A. Nitrogen oxides B. Leadd c. Carbon dioxide D. DDT E. Nitrates |
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| 478 | 195. In stratosphere CFCs get broken down by the action of powerful UV radiation releasing: (a) CH (c) Ċi (b) CIO (d) CFCI, |
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| 479 | 185. Which are natural sinks for CIO radicals in other parts of stratosphere? (a) so, and NO (b) NO and NO (C) CH, and NO, (d) Cl, and F |
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| 480 | How much ( % ) of the atmosphere’s mass is contained in the troposphere? A . 20 B. 80 ( c .50 ) D. 60 |
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| 481 | To determine BOD value, what is the time period of sample for incubation? A. 4 hours B. 2 hours c. 3 days D. 5 days |
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| 482 | 29. Out of so,, CO, O2, NO and peroxyacetyl nitrate (PAN), primary and secondary pollutants are Primary Secondary (a) SO, 02, NO CO, PAN (b) SO, NO PAN, O2, CO (c) SO, CO, NO PAN, O, (d) PAN, Oz SO,, CO, NO |
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| 483 | Cochineal insects have proved very useful for the control of A . Eicchornia B. cactus c. weeds D. Parathenium |
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| 484 | Which is more hazardous to human health? A. Pyrethrum B. DDT c. Rotenone D. Humulin |
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| 485 | In which year the first ozone hole was discovered? A . 1980 в. 1983 ( c cdot 1985 ) D. 1990 |
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| 486 | The gases associated with the green house effect is: A. ( C O_{2} ) в. ( O_{2} ) c. methene D. ( C O ) |
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| 487 | What is the abundance of oxygen in the universe? A. 2nd most common element, by mass B. 3rd most common element, by mass c. 5th most abundant element, by mass D. oxygen is relatively rare in the universe |
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| 488 | reduces toxicity, minimizes waste, saves energy, and cuts down on the depletion of natura resources. It allows for advances in chemistry to occur in a much more environmentally benign way A. Green chemistry B. Green revolution c. waste management D. None of the above |
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| 489 | Which one of the following is the main cause of land degradation in Punjab? A. Intensive cultivation B. Deforestation c. over irrigation D. Overgrazing |
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| 490 | Which of the following actions will help to reduce pollution? Composting kitchen and garden waste 2. Using unleaded petrol in cars 3. Spraying pesticides on plants to kill pests 4. Littering chocolates and biscuits wrappers A . 1 and 2 B. 3 and 4 C. 1,2 and 3 D. 1,2 and 4 |
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| 491 | 123. Deficiency of (F) in drinking water causes tooth decay. Its International Standard limit makes the enamel on tooth much harder by converting hydroxyapatite into much harder (a) Ca(PO2)2. CaF (b) Ca,(PO), 3CaF, (c) 3Caz(PO2)2. CaF, (d) 3Caz(PO 22.3CaF, |
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| 492 | The function of sedimentation tank in sewage treatment is to: A. disinfect the sewage B. aerate the sewage c. remove water content D. remove suspended solids |
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| 493 | ‘Thermal pollution’ means dumping heat in an ecological system, like a lake or a pond. Thermal power plants have to throw some heat into a ‘sink’ because of they: A. get overheated B. have special anti-pollution laws c. follow the local sanitation laws D. follow the second natural law of thermodynamics |
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| 494 | Carbon dioxide and methane are the two major components of greenhouse. A. True B. False |
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| 495 | Which of the following is an example of non-biodegradable detergent? ( A ) [ mathrm{CH}_{3}-left(mathrm{CH}_{2}right)_{mathrm{n}}-sqrt{1}-mathrm{s} mathrm{O}_{3} mathrm{Na} ] в. [ left.mathrm{CH}_{3}-left(mathrm{CH}_{2}right)_{9}-underset{mathrm{CH}_{3}}{mathrm{CH}}-sqrt{prime}_{-}rightrangle-mathrm{SO}_{3} mathrm{Na} ] ( c ) D. ( C H_{3}-left(C H_{2}right)_{10}-C H_{2}-O S O_{3} N a ) |
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| 496 | Maximum prescribed limit of Fe in drinking water is: A. 0.1 ppm B. 0.2 ppm c. 0.5 ppm D. ( 0.2 mathrm{ppb} ) |
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| 497 | Q14. Why is acid rain considered as threat to Taj Mahal? Ano Aide procentinaid |
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| 498 | .6 Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of (a) large number of mosquitoes (b) increase in the amount of dissolved oxygen (c) decrease in the amount of dissolved oxygen in water (d) clogging of gills by mud for cuintin life Organic waste is oxidised by |
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| 499 | Tropical cyclones that originate in the Chine sea are? A. Hurricanes B. Typhoons c. Tornadoes D. Cyclones |
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| 500 | Component of smog is ( A cdot O_{3} ) B. PAN c. PPN and PBN D. Both A and B |
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| 501 | What do you mean by the following: i. Sewage ii. Eutrophication iii. Recycling |
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| 502 | Q7. What is the nature of classical smog? | 11 |
| 503 | Q. 10. What do you mean by viable and non-viable particulates? | 11 |
| 504 | Which of the following is regarded as the main cause of groundwater contamination? A . agricultural products B. Iandfills c. septic tanks D. All of the above main sources of ground water contamination |
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| 505 | What will happen if chemical fertilizers are used for a longer time. A. soil always stays fertile for plant growth B. soil fertility is damaged c. soil stops responding to fertilizers D. soil health is maintained |
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| 506 | 132. Soybean is used to replace traditional inks in printer cartridges highlighting which of the green chemistry principles? (a) Use of renewable feedstocks (b) Atom economy (c) Reduce derivatives (d) Prevent waste |
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| 507 | Carbon dioxide is the major component of greenhouse gases. A. True B. False |
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| 508 | State True or False. Deforestation increases the chances of natural calamities A. True B. False |
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| 509 | Greenhouse effect is a major cause of: A . global warming B. reduction of temperature c. acid rain D. all of above |
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| 510 | Assertion Presence of green plant is essential for greenhouse effect. Reason Chlorophyll of green plants cause greenhouse effect. 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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| 511 | Which of the following is/are correct statement(s) regarding agricultural activities as a reason for water scarcity? This question has multiple correct options A. A majority of farmers in India depend upon rains for irrigating their crops. B. Irrigation systems such as canals are there only in a few places c. Even these systems may suffer from lack of water due to erratic rainfall D. Farmers have to use groundwater for irrigation |
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| 512 | Which pair of compounds would make an NPK fertiliser? A. Ammonium sulfate and potassium phosphate B. Calcium hydroxide and ammonium nitrate C. Calcium phosphate and potassium chloride D. Palcium phosphate and potassium chloride |
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| 513 | Earth’s greenhouse effect causes: A. warmer surface temperatures B. cooler surface temperature C. there is no change in surface temperature D. None of these |
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| 514 | 219. Out of PAN, H,CO2, H,SO, and HNO, acid rain contains (a) PAN, H,CO, (b) H2SO4, HNO, (c) PAN, HNO3 (d) PAN, H,SOZ |
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| 515 | The BOD value of municipal sewage is: A. ( 1-5 ) ppm B. 5-10 ppm c. ( 50-100 ) ppm D. 100-4000 ppm |
11 |
| 516 | The gas emitted by supersonic jet planes that slowly depletes the concentration of ozone layer is A. ( C O ) B. ( N O ) ( c cdot s O_{2} ) D. ( O_{2} ) E . ( H F ) |
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| 517 | Brown mottling of teeth occurs when ( F^{-} ) ion concentration in drinking water becomes: A. less than 1 ppm B. greater than 1 ppm c. greater than 5 ppm D. it does not depend on ( F^{-} ) ion concentration |
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| 518 | 205. A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low pH. This is due to the presence of pollutants (a) CO2 (b) SO, (c) Both (a) and (b) (d) None of these |
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| 519 | 138. CH CHO can be prepared by (1) CH,COCl + H2PaBaSO4_→ CH,CHO + HCI (II) CH2 – CH2 + 02 – Pd(II)/Cu(II) In water 2 Which of the above is in accordance with NGT rules? (a) Only II (b) Only I (c) Both (a) and (b) (d) None of these |
11 |
| 520 | If all the vegetation in the pond died, what effects would it have on the animals? Why? |
11 |
| 521 | Which is responsible for ozone depletion? A . ( C F C s ) B. Hydrocarbons ( c cdot C O_{2} ) D. ( C O ) |
11 |
| 522 | Distinguish between the following. Water pollution – Land pollution. | 11 |
| 523 | Which oxides cause acid rains? A. Sulphur dioxide B. Nitrogen oxide C. Carbon dioxide D. Both A and B |
11 |
| 524 | Which of the following crop is not grown in clayey soil? A. Wheat B. Gram c. Paddy D. cotton |
11 |
| 525 | Q13. List out the gases which are considered as major source of air pollution. | 11 |
| 526 | Q8. What are the harmful effects of photochemical smog and how can they be controlled? 111 |
11 |
| 527 | Photochemical smog is related to the pollution of A. Soil B. water c. Noise D. Air |
11 |
| 528 | Q10. What do you mean by ozone hole? What are its consequences? Las in the blar |
11 |
| 529 | What do you mean by Biochemical Oxygen Demand (BOD)? | 11 |
| 530 | Which of the following layer has more minerals? A. A-Horizon B. B-Horizon c. C-Horizon D. Both A and C |
11 |
| 531 | 209. 1000 L of air at STP was dissolved in water and required 2.5 x 10-5 moles of KMnO, for complete reaction of SO, as pollutants. Thus, SO, content in air is (a) 1.4 ppm (b) 14 ppm of an (d) 6.25 ppm to (C) 2.8 ppm |
11 |
| 532 | Pollution is mainly caused by: A. increase in population and decrease in natural resources B. industrialisation C. urbanization and deforestation D. all the above |
11 |
| 533 | Which of the following is a recently originated problem of environment? A. Ozone layer depletion B. Green house effect c. Global warming D. All of the above |
11 |
| 534 | 5. The gas which reacts with haemoglobin in blood is (@) CO (b) SO2 (c) CO₂ (d) NO2 11 |
11 |
| 535 | 188. Leaded petrol used to be the primary source of air-borne lead emission. This problem has been overcome by (a) using TEL loaded petrol (b) using ethanol-mixed petrol (c) using unleaded petrol (d) Using MTBE loaded petrol |
11 |
| 536 | 8. Which of the following will increase the BOD of water supply? (a) Oz (b) C H OH (c) HO (d) CO2 |
11 |
| 537 | Long term usage of insecticides results in A. Sensitivity in insects B. Kills insects c. Resistance in insect D. Decrease in insect population |
11 |
| 538 | 215. Which of the following statements is not true about classical smog? (a) Its main compounds are produced by the action of sunlight on emissions of automobiles and factories (b) Produced in cold and humid climate (c) It contains compounds of reducing nature (d) It contains smoke, fog and sulphur dioxide |
11 |
| 539 | Green house gas among the following is/are: A. carbon dioxide B. nitrogen oxides c. methane D. all of the above |
11 |
| 540 | Which of the following statements about Radioactive pollution are correct? 1. It causes genetic changes in the animals. 2. It causes disbalance among different minerals in the soil. 3. It hinders blood circulation. 4. It causes cancers. Select the correct answer from the codes given below: A . 1 and 2 B. 1 and 4 c. 1,3 and 4 D. 2, 3 and 4 |
11 |
| 541 | affect the soil profile and bring changes in soil structure. A. Vegetation B. Animals c. climatic factors D. Fertilizers |
11 |
| 542 | Ozone-layer is getting depleted because of: A. excessive use of automobiles B. excessive formation of industrial units c. excessive use of man-made compounds containing both fluorine and chlorine D. excessive deforestation |
11 |
| 543 | 43. Select the correct statement(s) about stratosphere. (a) Temperature increases slowly from 220 to 270 K (b) Supersonic aircrafts fly in the lower region of the stratosphere (c) Both (a) and (b) (d) None of these |
11 |
| 544 | hy 200. Which of the following reactions will deplete O3 layer? (a) HOCI_bv ,oh+ċi (b) CI, hv>2ċi (C) CF,CI,_bv , CF CI+ CI (d) All of these hv |
11 |
| 545 | The water temperature should preferably be less than ( _{–} ) degree Celsius. A . 10 B. 25 c. 15 D. 30 |
11 |
| 546 | Ozone in stratosphere is depleted by A ( cdot C F_{2} C l_{2} ) в. ( C_{7} H_{16} ) c. ( C_{6} H_{6} C l_{6} ) D. ( C_{6} F_{6} ) |
11 |
| 547 | Among the following, which do not come under the category of sewage treatment? A. The organic material present in the waste is allowed to undergo microbial oxidation B. Large size material are filtered through screen C. The waste water is suitably treated for the removal of phosphate by the coagulation method D. Degrading the number of toxic organic waste |
11 |
| 548 | “Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up ( _{–} ) of the atmosphere.” A . 21% в. 22% c. 23% D. 24% |
11 |
| 549 | Which of the following is not an objective of Green chemistry? A. It is better to prevent waste than to treat or clean up waste after it has been created B. The use of auxiliary substances (e.g., solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used. C. Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure. D. None of the above |
11 |
| 550 | 44. Ultra violet light of Sun’s radia- tion is prevented from reaching the earth’s atmosphere by the layer of (1) Oxygen (2) Hydrogen (3) Ozone (4) Helium |
11 |
| 551 | According to The United States Geological Survey, water having less than ( 1000 mathrm{mg} / ) litre of total dissolved solids is: A. fresh water B. slightly saline c. moderately saline D. brine water |
11 |
| 552 | 14. So, as pollutant can be controlled by (I) using solar energy, nuclear energy, hydroelectric energy. (II) low sulphur fuels, natural gas. (III) desulphonation of high sulphur coal and oil before burning by FGD. (IV) using water under high pressure. Correct methods are (a) Both I and II (b) Both I and III (c) I, II and IV (d) I, II and III |
11 |
| 553 | 95. Most hazardous metal pollutant of automobile exhauste is: (a) mercury (b) cadmium (c) lead (d) copper |
11 |
| 554 | 127. Business benefits of green chemistry include (a) reduced costs associated with waste treatment and disposal (b) innovating ‘greener’ products to customers (c) greater compliance with environmental legislation (d) All of the above |
11 |
| 555 | Q. 17 Green house effect leads to global warming. Which substances are responsible for green house effect? |
11 |
| 556 | Which of the following is responsible for soil erosion in farms? A. Rivers and wind work B. Defective methods of farming c. Flowing water D. Moving glaciers |
11 |
| 557 | Ammonium nitrate ( left(N H_{4} N O_{3}right. ) phosphorus as ( P_{2} O_{5} ) and potassium as ( K_{2} O ) is called : A . organic manure B. mixed fertilizers c. insecticides D. pesticides |
11 |
| 558 | 57. Mesopause represents the point of temperature inversion between (a) troposphere and stratosphere (b) troposphere and mesosphere (c) stratosphere and mešosphere (d) mesosphere and thermosphere |
11 |
| 559 | Which of the following is not a green house gas? A. Carbon dioxide B. Water vapour c. oxygen D. Methane |
11 |
| 560 | Q. 43 Assertion (A) Ozone is destroyed by solar radiation in upper stratosphere. Reason (R) Thinning of the ozone layer allows excessive UV radiations to reach the surface of earth. (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 |
11 |
| 561 | What is meant by soil erosion? | 11 |
| 562 | Which of the following is not a major greenhouse gas? A. Carbon dioxide B. Methane c. calcium carbonate D. water vapour |
11 |
| 563 | Pathogens are: A. one which kills bacteria present in our body B. one which live on other micro-organisms C. disease causing agents D. good for our health |
11 |
| 564 | The acid rain destroys vegetation because it contains A. Nitrates B. ( mathrm{H}_{2} mathrm{SO}_{4} ) ( c cdot 0_{3} ) D. co |
11 |
| 565 | Q. 19 Ozone is a toxic gas and is a strong oxidising agent even then its presence in the stratosphere is very important. Explain what would happen if ozone from this region is completely removed? |
11 |
| 566 | Which of the following are causes of industrial pollution? A. Asbestos B. Oils c. Nitrates & Phosphates D. All of above |
11 |
| 567 | Assertion Agriculture output increased several times after introduction of DDT. Reason DDT was the first insecticide used on a wide scale. 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. |
11 |
| 568 | Disease caused by eating fish found in water contaminated with industrial waste having mercury is: A. minamata disease B. brights disease c. hashimotos disease D. osteosclerosis |
11 |
| 569 | Acid rain is caused by A. industries B. power plants c. automobiles D. all of above |
11 |
| 570 | Those gases or particles that are pumped into the air to make it unclean are called A. primary air pollutant B. secondary air pollutant c. teritiary air pollutant D. none of above |
11 |
| 571 | 89. Negative soil pollutant is (a) converting fertile land into barren land by dumping ash, sludge and garbage (b) reduction in soil productivity due to addition of pesticides and industrial wastes (c) reduction in soil productivity due to erosion and overuse (d) none of the above |
11 |
| 572 | Which soil horizon contains humus? A. A-Horizon B. B-Horizon c. C-horizon D. Bedrock |
11 |
| 573 | 222. The false statement among the following: (a) The average residence time NO is one month (b) Limestone acts as a sink for SO (c) SO, can be removed from flue gases by passing through a solution of citrate ions (d) Ammonia acts as a sink for NO |
11 |
| 574 | 48. Coating of solid waste with imper- vious material is known as (1) Encapsulation (2) Chemical fixation (3) Landfill (4) Capping |
11 |
| 575 | The main reasons for deforestation are: A. rapid increase in the population of human beings and their livestock B. urbanization and human settlements c. cutting down of trees for obtaining fuel D. All of the above |
11 |
| 576 | Which of the following statements about photochemical smog is not correct? A. It occurs in warm, dry and sunny climate. B. Chemically, it is a reducing mixture and is called reducing smog. C. It is formed as a result of action of sunlight on unsaturated hydrocarbons and nitrogen oxides. D. It has high concentration of oxidising agents and is also called oxidising smog. |
11 |
| 577 | Green chemistry means such reactions which: A. produce colour during reactions B. reduce the use and production of hazardous chemicals C. are related to the depletion of ozone layer D. study the reactions in plants |
11 |
| 578 | 33. The major source(s) of gaseous hydrocarbons as pollutants is/are (a) Anaerobic decay of vegetable matter in nature (b) Emissions from municipal sewage plants (c) From refineries (d) All of the above |
11 |
| 579 | 170. Photochemical smog consists of excessive amount of X, in addition to aldehydes, ketones, peroxyacetyl nitrite (RCO NO,) and so forth. (X) is (a) CH4 (b) CO (c) 03 (d) CO, |
11 |
| 580 | 16. What do you mean by green chemistry? How will it help in decreasing environmental pollution? die about utilising the existing knowledad |
11 |
| 581 | What is one environmental problem associated with the use of detergents? A. Global warming B. Eutrophication c. Errosion D. Photochemical smog |
11 |
| 582 | 133. Who was a co-founder of the worldwide green chemistry movement and the first director of the Green Chemistry Institute? (a) Paul Anastas (b) Albert Einstein (c) John Warner (d) Joseph Bren |
11 |
| 583 | Q3. Carbon monoxide gas is more dangerous than carbon dioxide gas. Why? | 11 |
| 584 | What do you mean by ozone hole? What are its consequences? |
11 |
| 585 | Q17. What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss. hic absorbed by the green 1 |
11 |
| 586 | Give uses of ethanol as fuel. How it conserves fossil fuel. |
11 |
| 587 | Which one of the following is an environment related disorder with correct main cause? A. Black lung disease is found mainly in workers of stone quarries and crushers B. Blue-baby disease is due to heavy use of nitrogeneous fertilizers. C. Non-Hodgkin’s Iymphoma is found mainly in worker involved in manufacture of neem-based pesticides. D. Skin cancer occurs mainly in people exposed to benzene and methane. |
11 |
| 588 | The absorption of ( U V ) radiation by ( O_{3} ) A. protects the inhabitants of our planet from injurious radiation B. maintains an equilibrium between the concentrations of ( O_{2} ) and ( O_{3} ) c. makes both the function A and B above effective D. makes no function effective |
11 |
| 589 | Water pollution can be defined as: A. Physical change in the properties of water B. Chemical change in the properties of water C. Biological change in the properties of water D. All of the above |
11 |
| 590 | Identify the wrong statement in the following. A. Ozone layer does not permit infrared radiation from the sun to reach the earth B. Acid rain is mostly because of oxides of nitrogen and sulphur C. Chlorofluorocarbons are responsible for ozone layer depletion D. Greenhouse effect is responsible for global warming |
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| 591 | Use of chlorofluorocarbons is not encouraged because: A. they are harmful to the eyes of people that use it B. they damage the refrigerators and air conditioners C. they eat away the ozone in the atmosphere D. they destroy the oxygen layer |
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| 592 | 1. Which of the following acid is most abundant in acid rain? (a) HCI (b) HNO3 (c) H2SO4 (d) Organic acid TAL: 1 11. 2 |
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| 593 | What is the optimum concentration of flouride required by body? A. 2 ppm B. 5 ppm c. 10 ppm D. 1 ppm |
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| 594 | Negative soil pollution is: A. reduction in soil productivity due to erosion and over use B. reduction in soil productivity due to addition of pesticides and industrial wastes C. converting fertile land into barren land by dumping ash, sludge and garbase D. none of the above |
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| 595 | Suggest four measures to check water pollution. | 11 |
| 596 | BOD refers to the A. Bidding of Dermatology B. Binding of Dirt C. Biochemical occupied Date D. Biochemical Oxygen demand |
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| 597 | The maximum limit of nitrate in drinking water is: A. 50 ppm B. 40 ppm ( c .10 mathrm{ppm} ) D. 100 ppm |
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| 598 | Acid rain produced when rain mixes with gases such as sulphur dioxides. This will eventually result in: A. lowering of pH and change of temperature in ponds B. raising of pH in ponds, encouraging growth of microorganisms c. lowering of pH in ponds, limiting survival of aquatic organism D. raising of pH in ponds, limiting development of organisms |
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| 599 | 2011 is the international year of chemistry. “Chemistry is our life, our future”, is the motto. “Chemistry is not a problem but a solution” is the message of green chemistry. Explain the relevance of this message. |
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| 600 | Ozone hole is maximum over: A . europe B. antarctica ( c . ) india D. africa |
11 |
| 601 | Photochemical smog consists of an excessive amount of ( X ) in addition to aldehydes, ketones, PAN etc. ( boldsymbol{X} ) is : A. methane B. ozone c. carbon dioxide D. carbon monoxide |
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| 602 | Switching from air to pure oxygen eliminates the NO production. This is an application of: A. Green chemistry B. waste management c. Green revolution D. none of above |
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| 603 | Which of the following statements are true about acid rain? (i) Acid rain is harmful to some plants and animals. (ii) Acid rain mainly comprises the sulphuric acid and nitric acid (iii) Acid rain helps farmers to produce more crops. (iv) Acid rain corrodes buildings and statues. A ( cdot ) (i) and (ii) B. (i) and (iii) ( c cdot ) (i), (iii) and (iv) D. (i), (ii) and (iv) |
11 |
| 604 | Q3. What is photochemical smog? What are its effects? How can it be controlled? | 11 |
| 605 | This process in which nutrient enriched water bodies support a dense plant population, which kills animal life by depriving it of oxygen and results in subsequent loss of biodiversity is known as A. green-house effect B. eutrophication c. land pollution D. none of above |
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| 606 | Green chemistry is: A. way of thinking and utilising the existing knowledge and principles of chemistry and other sciences B. study of plants for making the environment clean C. both ( A ) and ( B ) D. None of the above |
11 |
| 607 | 128. The word is synonymous with green chemistry and also means harmless, or gentle and not life-threatening? (a) Benign b) Sustainable (c) User friendly (d) Greenness |
11 |
| 608 | Which of the following is affected by acid rains? A. Infrastructure B. Aquatic life c. Plants D. All of the above |
11 |
| 609 | “Solving the problem of pollution is an effective way of environmental management” Justify the statement | 11 |
| 610 | Which of the following industries may be a reason for water scarcity? A. Chemical industry B. Pharmaceutical industry C. Textile industry D. All of the above. |
11 |
| 611 | Q12. Have you ever observed any water pollution in your area? What measures would you suggest to control it? |
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| 612 | 28. Air is said to be saturated when : (1) it contains maximum content of water vapour (2) its pressure is minimum (3) its thickness is maximum (4) it blows over the barren land |
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| 613 | Which of the following is not present in Water? A. Antimony B. Arsenic c. Benzene D. Bismuth |
11 |
| 614 | What are the advantages of chlorofluorocarbons? A. Excellent refrigerants B. Very good propellants c. Useful in firefighting D. All of the above |
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| 615 | The most significant sources of water pollution A. waste water from domestic and industrial processes B. agricultural process c. oil spillage D. all of the above |
11 |
| 616 | Industrial waste include: A. chemical solvents, paints B. sandpaper, paper products C. industrial by-products, radioactive waste D. all the above |
11 |
| 617 | Which of the following statements is true about acid rain? A. Acid rain will erode marble statues B. Acid rain can change the pH of lakes and streams C. Acid rain can be formed from carbon dioxide D. Acid rain creates holes in the ozone layer E. All of the above |
11 |
| 618 | 77. Acid rains are produced by (a) excess NO, and So, from burning fossil fuels (b) excess production of NH, by industry and coal gas (c) excess release of carbon monoxide by incomplete combustion (d) excess formation of Co, by combustion and animal respiration |
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| 619 | Which of the following products have green chemistry approach? A. Ibuprofen B. Surfactant c. Propene D. All of the above |
11 |
| 620 | Sewage is a complex mixture containing suspended: A. solids organic and inorganic nutrients B. organic impurities only C. inorganic impurities only D. all of the above |
11 |
| 621 | Rich in lather, mixed with oil, blackbrown water that goes down the drains from ( _{text {一一一一一一一一 }} ) is dirty. It is called waste water. A. sinks B. toilets, showers c. laundries D. all of the above |
11 |
| 622 | Which of the following is not a water pollutant? A. Metal nitrates B. Sewage c. oxygen D. Human excreta |
11 |
| 623 | Which one of these is a herbicide? A . DDT в. ВНС c. Dioxin D. Dieldrin |
11 |
| 624 | One of the soil pollutants is A. radioactive substances B. pesticides C. herbicides D. all of above |
11 |
| 625 | 163. Smog can be controlled by (a) use of catalytic converters in automobiles (b) setting the air-fuel ratio in engine in such a way to produce some CO and unburnt hydrocarbons (c) Both (a) and (b) (d) None the above |
11 |
| 626 | 121. Iron and manganese present in water are removed by (a) chlorination (b) aeration (c) filtration (d) lime soda treatment |
11 |
| 627 | Very Short Type Question How is ozone important for us? | 11 |
| 628 | Q. 48 Explain how does green house effect cause global warming? Ans Visible light from |
11 |
| 629 | One way of preventing pollution of the air is by passing exhaust gases through a filter. Glass fibre or silicone-treated bags of textile material are used for filtering. A. Hot gases B. High pressure gases c. cold gases D. Reactive gases |
11 |
| 630 | The gas that is not considered as a green house gas’ is: A. ( C O_{2} ) в. ( C H_{4} ) ( c cdot O_{2} ) D. ( O_{3} ) |
11 |
| 631 | Which liquid is found on the feather of birds and animal fur? | 11 |
| 632 | 104. Which of the following is false? (a) Photochemical smog has high concentration of reducing agents and is, therefore, called as reducing smog. (b) Non-viable particulates consist of smoke, dust, mist, Is brfumes etc. (c) Classical smog occurs in cool humid climate and it is mixture of smoke, fog and sulphur dioxide. (d) Ozone reacts with unburnt hydrocarbons in polluted air to produce peroxyacetyl nitrate (PAN). |
11 |
| 633 | The major air pollutant is: A. ( C O ) B. oxides of nitrogen ( c . ) soot D. oxides of sulphur |
11 |
| 634 | The increase in temperature on the earth disturbs the water cycle and reduces rainfall. The situation may lead to: A. floods B. droughts c. increased level of ( C O_{2} ) D. all of the above |
11 |
| 635 | Biomass is used instead of extensive use of petroleum. This is an application of : A. Green revolution B. waste management c. Green chemistry D. revolution resource recover |
11 |
| 636 | What is the cause of Green house effect? A. Infrared rays B. Ultraviolet rays c. x-rays D. Radio waves |
11 |
| 637 | Green chemistry means such reactions which – A. are related to the depletion of ozone layer B. study the reactions in plants c. produce colour during reactions D. reduce the use and production of hazardous chemicals |
11 |
| 638 | Corrosion of statues and monuments occurs due to A. Photochemical smog B. Carbon monoxide c. Acid rain D. Methane |
11 |
| 639 | Among the following compounds, which one is not responsible for the depletion of ozone layer? A ( cdot C H_{4} ) в. ( C F C l_{3} ) c. ( C H C l_{3} ) D. ( C l_{2} ) |
11 |
| 640 | 4. Which one of the following statements is not true? (a) Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant. (b) pH of drinking water should be between 5.5 and 9.5. (c) Concentration of DO below 6 ppm is good for the growth of fish. Clean water would have a BOD value of less than 5 ppm. (AIEEE 2011) |
11 |
| 641 | Q18. Give the examples of insecticides. | 11 |
| 642 | Q. 39 Assertion (A) Green house effect was observed in houses used to grow plants and these are made of green glass. Reason (R) Green house name has been given because glass houses are made of green glass. (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 |
11 |
| 643 | Assertion(A): The temperature in the stratosphere increases with altitude. Reason(R): Ozone present absorbs ultraviolet radiation which is converted into heat. Choose the correct option from the following: A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion B. Both Assertion and Reason are true but Reason is not correct explanation of Assertion C. Assertion is true and Reason is false D. Assertion is false and Reason is true |
11 |
| 644 | Which of the following layer of the soil contains more humus? A. Top soil B. Subsoil c. Bedrock D. None of the above |
11 |
| 645 | Which of the following layer of soil is called as zone of leaching? A. ( A_{0} ) B. ( A_{00} ) c. ( A_{2} ) D. ( A_{1} ) |
11 |
| 646 | The correct statements among the following is: A. fly ash is generated by steel industry B. green chemistry is concerned about minimum pollution C . green fuel is that obtained from plastic wastes D. All of the above |
11 |
| 647 | Discharge of industrial waste into the soil causes A. soil pollution B. air pollution c. water pollution D. all of above |
11 |
| 648 | Q.2 Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it. (a) NO2 (b) O (c) SO2 (d) Unsaturated hydrocarbon |
11 |
| 649 | 110. DDT is represented chemically as Н СІ (a) C12 (_C1 AĆI 09 (6) rica (c) C1- C1 СІ СІ (d) None of these |
11 |
| 650 | Which of the following statements about ozone is true? A. Ozone layer is benifical to us because ozone cuts the ultraviolet radiationof the sun B. The conversion of ozone to oxygen is an endothermic reaction C. Ozone is triatomic linear molecule D. Ozone layer is harmul as it cuts out radiation useful for photosynthesis |
11 |
| 651 | The current synthesis of poly-carbonate is an application of: A. green revolution B. green chemistry C. waste management D. none of above |
11 |
| 652 | 3. The aromatic compounds present as particulates are (a) Benzene (b) Toluene (c) Nitrobenzene (d) Polycyclic aromatic hydrocarbons |
11 |
| 653 | Ozone higher up in the atmosphere acts as a shield to prevent UV rays from reaching the Earth’s surface These UV rays are responsible for which of the following diseases? (i) Skin cancer (ii) Eye damage (iii) Lung cancer (iv) Damage to immune system Colour blindness A . (i), (ii) & (iii) B. (i), (ii), (iv) & (v) ( c cdot(i),(text { iii) },(v) ) D. (i), (ii), (iii), (iv) & (v) |
11 |
| 654 | Over a number of years the average pH of a stream changes from a pH of 6.9 to a pH of 5.9 due to acid rain. Which statement is true about the pH of the stream? A. The pH of the stream now is one times more acidic than it was years ago B. The stream now has 10 times more hydroxide ions than it did years ago c. The pH of the stream is now 10 times more acidic than it was years ago D. The stream is more basic now than it was years ago E. The concentration of hydronium ion in the stream has decreased over the years |
11 |
| 655 | Methods used for the management of waste is/are: A. recycling B. incineration c. digesting D. all of the above |
11 |
| 656 | Argon is a greenhouse gas. A. True B. False |
11 |
| 657 | In the soil profile, which layer is harder and more compact? A. Bedrock B. Subsoil c. Surface soil D. Parent rock |
11 |
| 658 | Among the following, the one which is not a “greenhouse gas”, is: A ( cdot N_{2} O ) в. ( C O_{2} ) ( mathrm{c} cdot mathrm{CH}_{4} ) D. ( O_{2} ) |
11 |
| 659 | “The final Agent Orange raid in Vietnam took place in 1970 areas have begun to bloom in 1970. But 19 years after the war’s end, it seem plain that Agent Orange is killing and maiming human beings, something it never intended to do. The apparent toxic fallout from those clouds ( _{—} ) is a crop of human miseries including cancers, miscarriages and birth defects – that may persist for decades.” The offensive substance referred to in this quotation is A. A complex minute of DDT and other insecticides used as aerial sprays for protection against malaria and other tropical diseases B. A complex mixture of herbicides and weedicides used to increase agricultural output in the South Vietnam under the U.S. aid programme c. Dot used as an insecticide D. Dioxin used as defoliants |
11 |
| 660 | The study of the vertical section of the layers of the soil is known as A. Soil study B. Soil profile c. Soil layering D. Soil weathering |
11 |
| 661 | Most harmful pesticide is ( A cdot 2,4-D ) в. ( 2,4,5- ) – c. DDT D. PAN |
11 |
| 662 | The greenhouse effect is useful because: A. it reduces water pollution B. it increases normal temperature of earth c. keeps the temperatures on our planet mild and suitable for living things D. reduces greenhouse gases |
11 |
| 663 | The full form of LDPE is low-density polyester, which is monomer of first grade unit. A. ester B. alcohol c. ether D. phenol |
11 |
| 664 | We need fresh air for breathing. Some sources that cause pollution of air are mentioned here. Can you pick the false one? A. Coal fires B. Heavy rain c. volcanoes D. Forest fires |
11 |
| 665 | Which of the following practices will not come under green chemistry? A. If possible, making use of soap made of vegetable oils instead of using synthetic detergents. B. Using ( H_{2} O_{2} ) for bleaching purpose instead of using chlorine based bleaching agents. C. Using bicycle for travelling small distances instead of using petrol/diesel based vehicles. D. Using plastic cans for neatly storing substances. |
11 |
| 666 | Q. 44 Assertion (A) Excessive use of chlorinated synthetic pesticides causes soil and water pollution. Reason (R) Such pesticides are non-biodegradable. (a) Both A and Rare 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 Rare not correct (d) A is not correct but R is correct |
11 |
| 667 | It is a gyre of marine debris particles found by Charles Moore in the Central North Pacific Ocean. It is characterised by exceptionally high relative concentrations of pelagic plastics, chemical sludge and other debris. What is it called? A. Pacific trash vortex B. The grand junk of Pacific c. Great Pacific garbage patch D. Both (A) and (C) |
11 |
| 668 | What would have happened if the green house gases were totally missing in the earth’s atmosphere? Discuss. | 11 |
| 669 | Which of the following is a pollutant? A. Sooty particle B. Sulpur-dioxide c. carbon-monoxide D. All of above |
11 |
| 670 | Q. 45 Assertion (A) If BOD level of water in a reservoir is less than 5 ppm it is highly polluted. Reason (R) High biological oxygen demand means low activity of bacteria in water. (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 |
11 |
| 671 | Which one is more effective greenhouse ( operatorname{gas}, C O ) or ( H_{2} O ? ) If the answer is ( H_{2} O ) then enter 1 , else enter 0 |
11 |
| 672 | Which of the following is an example of photochemical smog? A. Ketones B. Aldehydes c. Ester D. None of the above |
11 |
| 673 | Among the following industrial waste can be managed by : A. recycling B. burning of combustible waste material c. dumping D. all of the above |
11 |
| 674 | Photochemical smog is formed in: A. summer during day time B. summer during morning time c. winter during morning time D. winter during day time |
11 |
| 675 | Which of the following is one of the gases responsible for green house effect? A ( cdot C O_{2} ) в. ( H_{2} S ) c. ( N_{2} ) D. None of the above |
11 |
| 676 | Which of the following reaction is not correct during the formation of acid rain? A. ( S+O_{2} rightarrow S O_{2} ) в. ( H_{2} O+S O_{2} rightarrow H_{2} S O_{3} ) c. ( H_{2} O+S O_{2} rightarrow H_{2} S O_{4} ) ( mathrm{D} cdot 2 mathrm{SO}_{2}+mathrm{O}_{2} rightarrow 2 mathrm{SO}_{3} ) |
11 |
| 677 | Which of the following represents type(s) of environmental pollution A. Air pollution B. water pollution c. soil pollution D. All of the above |
11 |
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