Chapter : 18) Environmental chemistry Question ID: 1817 Q 1. Correct Option: Hint : Explanation : Marks:1 Question ID: 1818 Q 2.

Transcription

1 Chapter : 18) Environmental chemistry Question ID: 1817 Q 1.The green house effect is caused by A. CO B. NO C. NO 2 D. CO 2 Correct Option: D Question ID: 1818 Q 2.drained sewage has B.O.D. A. more than that of water B. less than that of water C. equal to that of water D. none of the above Drained sewage has BOD higher than that of water. Question ID: 1819 Q 3.Biodegradable pollutants is A. Plastic B. Asbestos

2 C. Sewage D. DDT Sewage is a biodegradable pollutant out of these. Question ID: 1820 Q 4.Increasing skin cancer and high mutation rate are the results of A. acid rain B. ozone depletion C. CO pollution D. global warming Correct Option: B Increasing skin cancer and high mutation rate are the result of ozone depletion which causes more U.V. rays to reach the earth. Question ID: 1821 Q 5.A secondary pollutant is A. CO B. CO 2 C. PAN D. Aerosol

3 PAN is a secondary pollutant. Question ID: 1822 Q 6.Ozone layer of stratosphere requires protection from indiscriminate use of A. fungicides, insecticides, bactericides and medicines B. Aerosols and high flying jets C. Atomic explosions and industrial wastes D. Baloons and aeroplanes Correct Option: B Question ID: 1823 Q 7.Water pollution is less if BOD is A. less than 5 ppm B. less than 15 ppm C. les than 50 ppm D. les than 100 ppm

4 Question ID: 1824 Q 8.The pollutant released in Bhopal gas tragedy was A. Ammonia B. Methyl isocyanate C. Mustard gas D. Nitrous oxide Correct Option: B Question ID: 1825 Q 9.Acid rain is due to A. formation of oxides of sulphur B. formation of oxides of nitrogen C. formation of H 2 SO 4 and HNO 3 D. All of these Question ID: 1826 Q 10.Which statement is not correct? A. Positive soil pollution refers to the reduction in soil productivity due to use of fertilizers and pesticides. B. Negative soil pollution refers to the reduction in soil productivity due to erosion and over use. C. Nuclear chemistry is not a part of green chemistry. D. Loam soil contains unequal amounts of sand, silt and clay

5 Correct Option: D Loam soil contains equal amount of sand, slit and clay along with humus and air (34% air and 66% water). Question ID: 1827 Q 11.The smog is essential caused by presence of A. O 2 and O 3 B. O 3 and N 2 C. Oxides of sulphur and nitrogen D. O 2 and N 2 Oxides of sulphur and nitrogen along with dust and smoke combine with condensed water vapours to form smog. Question ID: 1828 Q 12.Pick up the correct statement A. CO which is major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog B. Classical smog has an oxidizing character while the photochemical smog is reducing in character C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours D. During formation of smog the level of ozone in the atmosphere goes down

6 Question ID: 1829 Q 13.Which of the following is not an air pollutant? A. N 2 B. N 2 O C. NO D. CO is not an air pollutant. Question ID: 1830 Q 14.Major Global environmental problems is/are A. Green house effect B. Acid rain C. Ozone hole D. All Correct Option: D

7 Question ID: 1831 Q 15.The primary pollutant out of these is A. PAN B. H 2 SO 4 C. HCHO D. CO Correct Option: D Only CO is a primary pollutant of these. Question ID: 1832 Q 16.Many people died in London in 1952 as a result of air pollution producing A. Mist B. Fog C. Smog D. CO Question ID: 1833 Q 17.Which of the particulates is the most toxic? A. Smog B. Soot C. Inorganic compound D. Fly ash

8 Correct Option: B Question ID: 1834 Q 18.Decomposition of organic material (leaves, roots etc.) in the soil by micro-organisms is known as A. Incineration B. BOD C. Humification D. None of these Question ID: 1835 Q 19.BOD is a measure of A. Organic pollutant in water B. Oxides of S, P and N in air C. Inorganic pollutant in water D. Particle matter in water

9 Question ID: 1836 Q 20.Which of the following period is suitable for "London smog"? A. Early morning of summer B. Early morning of winter C. Day time of summer D. Day time of winter Correct Option: B Question ID: 1837 Q 21.Which of the following is true for London smog? A. It occurs during warm weather B. It is reducing in nature C. It is a common feature over deserts D. it contain oxides of nitrogen Correct Option: B

10 Question ID: 1838 Q 22.White lung cancer is most abundant in the workers of which industry? A. Asbestos B. Textile C. Coal mines D. Paper Correct Option: B Question ID: 1839 Q 23.The major source of CO pollution is A. Forest fire B. Deforestation C. Automobile exhausts D. All the above Question ID: 1840 Q 24.Cyclone collector is used for reducing : A. Water pollution B. Air pollution C. Soil pollution D. All the above

11 Correct Option: B Cyclone collectors remove particulate from industrial flue gases. Question ID: 1841 Q 25.The biggest ozone hole is over? A. Antarctica B. America C. Europe D. Asia Question ID: 1842 Q 26.Which of the following is/are viable particulates? A. Bacteria B. Moulds C. Fungi D. All the three Correct Option: D

12 Question ID: 1843 Q 27.A considerable part of the harmful U.V. radiation of the sun does not reach the surface of earth because above the earth's atmosphere, there is a layer of A. CO 2 B. O 3 C. N 2 D. O 2 Correct Option: B In photosynthesis is consumed Question ID: 1844 Q 28.Which of the following process does not increase the amount of CO 2 in atmosphere? A. Decay of animals B. Breathing C. Photosynthesis D. Burning of petrol

13 Question ID: 1845 Q 29.Chief culprits of ozone layer depletion is/are A. Sulphur dioxide B. Carbon dioxide C. Carbon monoxide D. Nitrogen oxides and chloro fluorocarbons Correct Option: D Question ID: 1846 Q 30.Ultra-violet rays of sun can cause A. bronchitis B. haemophilia C. photodynamic action D. destruction of hydrogen bonds between complementary DNA strands Correct Option: D Question ID: 1847 Q 31.Atmospheric content of CO 2 is A % B % C. 0.34% D. 3.4%

14 Correct Option: B Atmosphere content of is 0.034% by volume. Question ID: 1848 Q 32.Ozone depletion in stratosphere shall result in A. forest fires B. increased incidence of skin cancer C. global warming D. none of the above Correct Option: B Ozone depletion in stratosphere shall result in increased incidence of skin cancer because of U.V. rays. Question ID: 1849 Q 33.Classical smog occurs in places of A. Excess SO 2 B. Low temperature C. High temperature D. Excess CO 2 Correct Option: B

15 Classical smog occurs in places of low temperature. Question ID: 1850 Q 34.The main cause of acid rain is increase in concentration of in air. A. Ozone and dust B. CO 2 and CO C. SO 3 and CO D. SO 2 and NO 2 Correct Option: D Acid rain is due to increase in atmospheric concentration of and. Question ID: 1851 Q 35.Disease caused by eating fish found in water contaminated with industrial waste having mercury is A. Minamata disease B. Bright's disease C. Methemoglobinemia D. Fibrosis

16 Question ID: 1852 Q 36.Marble acts as a sink for A. Metallic pollutants B. NH 3 pollutants C. acidic pollutants D. None Question ID: 1853 Q 37.The temperature of troposphere decreases with altitude and is minimum at about 10 km. This point of temperature inversion is known as A. Tropopause B. Stratopause C. Tempopause D. Tropoinversion This point of inversion is known as tropopause. Question ID: 1854 Q 38.Global warming may result in A. flood B. cyclone C. decrease in forest productivity

17 D. all of the above Correct Option: D Question ID: 1855 Q 39.The following question contains two statements. Choose one of the options below: Statement 1 : Living in the atmosphere of CO is dangerous. Statement 2 : CO combines with oxygen present inside the room to form CO 2. A. Statement-1 is True, Statement -2 is true, Statement - 2 is a correct explanation for Statement -1 B. Statement -1 is True, Statement -2 is true, Statement-2 is not a correct explanation for Statement-1 C. Statement-1 is True, Statement-2 is False D. Statement-1 is False, Statement-2 is True Statement-1 is true. The correct explanation is that CO combines with the hemoglobin of blood to form carboxyhemoglobin which reduces the oxygen carrying capacity of blood. Thus, it may prove fatal. Question ID: 1856 Q 40.Most abundant water pollutant is A. Detergents B. Pesticides C. Industrial wastes D. Ammonia Marks:4 Question ID: 5827 Q 41.Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

18 A. Fullereness B. Freons C. Polyhalogens D. Ferrocene Correct Option: B Freons and are ozone depleting agents in the stratosphere region. Question ID: 5828 Q 42.Fish die in water bodies polluted by sewage due to A. pathogens B. bad odour of sewage C. reduction in oxygen D. release of poisonous substances Fish die in water bodies polluted by sewage because dissolved content of water is reduced. Question ID: 5829 Q 43.Eutrophication can lead to A. Plastic B. Asbestos C. Sewage D. DDT Correct Option: B

19 Eutrophication can lead to reduction of dissolved oxygen due to growth of algae. Question ID: 5830 Q 44.Measurement of rate of oxygen consumed by a unit volume of water over a period of time is to measure A. Fermentation B. Biogas generation C. biosynthetic pathway D. Biological oxygen demand Correct Option: D Question ID: 5831 Q 45.Mottling of teeth is due to presence of an element in drinking water A. Mercury B. Fluorine C. Boron D. Chlorine Correct Option: B Mottling of teeth is due to the presence of excess of fluorine in drinking water.

20 Question ID: 5832 Q 46.As it passes into food chain, the concentration of DDT A. remains same B. decreases C. increases D. unpredictable As DDT passes into food chain, its concentration increases on each trophic level (biomagnification). Question ID: 5833 Q 47.The gas which reacts with haemoglobin strongly in blood is A. CO B. SO 2 C. CO 2 D. NO Question ID: 5834 Q 48.Ozone is present in A. Thermosphere B. Mesosphere C. Stratosphere

21 D. Troposphere Question ID: 5835 Q 49.Besides CO 2, the other green house gas is A. CH 4 B. N 2 C. Ar D. O 2 Question ID: 5836 Q 50.Ozone in stratosphere is depleted by A. CF 2 Cl 2 B. C 7 F 16 C. C 6 H 6 Cl 6 D. C 6 F 6

22 Freons and are ozone depleting agents in the stratosphere region. Question ID: 5837 Q 51.Tolerable limits of lead and fluorides in drinking water according to international standard are respectively A. 50 ppm and 1 ppm B. 50 ppb and 1 ppm C. 50 ppb and 5 ppm D. 1 ppm and 50 ppm Correct Option: B Question ID: 5838 Q 52.The region of atmosphere upto 11 km from earth surface is known as A. Troposphere B. Stratosphere C. Mesosphere D. Thermosphere

23 Question ID: 5839 Q 53.Flue gases are generally made free from NO x and SO x by A. Scrubbing them with H 2 SO 4 and citrate ions (H 2 Cit - ) respectively B. Scrubbing them with citrate ions (H 2 Cit - ) and H 2 SO 4 respectively C. Passing them through water and oxygen respectively D. Electro reduction and electro oxidation respectively Question ID: 5840 Q 54.When rain is accompanied by a thunderstorm, the collected rain water will have a ph value A. uninfluenced by occurrence of thunderstorm B. which depends on the amount of dust in air C. slightly lower than that of rain water without thunderstorm D. slightly higher than that when the thunderstorm is not there During thunderstorm, and combines to form oxides of nitrogen. These oxides of nitrogen dissolve in rain water to form nitric acid which lowers the ph of rain water. Question ID: 5841 Q 55.Identify the wrong statement in the following A. Acid rain is mostly because of oxides of nitrogen and sulphur B. Chlorofluorocarbons are responsible for ozone layer depletion C. Greenhouse effect is responsible for global warming

24 D. Ozone layer does not permit infrared radiation from the sun to reach the earth Correct Option: D Ozone layer does not permit u.v rays of sun to reach the earth. Question ID: 5842 Q 56.In Antarctica ozone depletion is due to the formation of following compound A. acrolein B. peroxy acetyl nitrate C. SO 2 and SO 3 D. chlorine nitrate Correct Option: D In Antarctica, chlorine nitrate chlorine). These HOCl and is hydrolysed (to give HOCl) and also reacts with HCl ( to give so formed are decomposed to give chlorine atoms which deplete ozone layer. Question ID: 5843 Q 57.Depletion of ozone layer over Antarctica occurs during A. Summer B. Winter C. Spring D. After spring

25 Question ID: 5844 Q 58.Poisonous gas present in the exhausts of car is A. CO B. CO 2 C. CH 4 D. C 2 H 2 Question ID: 5845 Q 59.Methane gas producing field is A. Wheat field B. Paddy field C. Cotton field D. Groundnut field Correct Option: B Methane gas is produced in paddy fields.

26 Question ID: 5846 Q 60.Photochemical smog is caused by A. CO B. CO 2 C. O 3 D. NO 2 Correct Option: D Photochemical smog is caused by oxides of nitrogen. Question ID: 5847 Q 61.Bio-degradable pollutant is A. Domestic waste B. Aluminium foil C. DDT D. Mercury salt Question ID: 5848 Q 62.The coldest region of atmosphere is A. Stratosphere B. Mesosphere C. Troposphere D. Thermosphere

27 Correct Option: B Question ID: 5849 Q 63.The most abundant hydrocarbon pollutant is A. Benzene B. Methane C. Gasoline D. Kerosene Correct Option: B Question ID: 5850 Q 64.The tolerable BOD limit of potable water is A. 5 ppm B. 10 ppm C. 1 ppm D. 15 ppm

28 Question ID: 5851 Q 65.'Los Angeles' smog is : A. Photochemical smog B. Sulphurous smog C. Industrial smog D. All the above Question ID: 5852 Q 66.Which of the following periods is most suitable for 'Los angeles" smog? A. Early morning of summer B. Early morning of winter C. Day time of summer D. Day time of winter

29 Question ID: 5853 Q 67.Addition of phosphate and nitrate fertilizers into water leads to : A. Improving the water quality B. Reduced algae growth C. Increased algae growth D. Increase in the ph of water Phosphates and nitrates fertilizers act as nutrients for water plants and cause eutrophication. Question ID: 5854 Q 68.Drinking water is treated with bleaching powder/chlorine to : A. remove hardness of water B. Coagulate suspended impurities C. Kill germs D. Increase the chlorine content of water These act as disinfectants. Question ID: 5855 Q 69.The ph of pure rain water is : A. equal to 7 B. less than 7 C. greater than 7 D. slightly above or below 7

30 Correct Option: B Question ID: 5856 Q 70.Air of metropolitan cities is polluted largely by A. automobile exhausts B. pesticide residue C. domestic waste D. nuclear fall out Question ID: 5857 Q 71.Most abundant water pollutant is A. Detergents B. Pesticides C. Industrial wastes D. Ammonia

31 Question ID: 5858 Q 72.DDT is A. a weedicide B. degradable pollutant C. non-degradable pollutant D. not a pollutant DDT is a non-biodegradable pollutant. Question ID: 5859 Q 73.Which causes water pollution? A. Smoke B. Automobile exhausts C. Jet planes D. 2, 4-D and pesticides Correct Option: D 2, 4-D (a herbicide) and pesticides cause water pollution. Question ID: 5860 Q 74.The following question contains two statements. Choose one of the options below:

32 Statement 1: Excess of in drinking water causes Minamata disease. Statement 2 : In the gastro intestinal tract, nitrate reducing bacteria reduces to which interferes with the oxygen transport capacity of blood. A. Statement-1 is True, Statement -2 is true, Statement - 2 is a correct explanation for Statement -1 B. Statement -1 is True, Statement -2 is true, Statement-2 is not a correct explanation for Statement-1 C. Statement-1 is True, Statement-2 is False D. Statement-1 is False, Statement-2 is True Correct Option: D Statement-1 is false since this will cause the disease known as methemoglobinemia (blue baby sundrome). Statement-2 is correct. Question ID: 5861 Q 75.The following question contains two statements. Choose one of the options below: Statement 1 : Photochemical smog (Los Angeles smog) is produced by oxides by nitrogen. Statement 2 : Vehicular pollution is a main source of oxides of nitrogen. A. Statement-1 is True, Statement -2 is true, Statement - 2 is a correct explanation for Statement -1 B. Statement -1 is True, Statement -2 is true, Statement-2 is not a correct explanation for Statement-1 C. Statement-1 is True, Statement-2 is False D. Statement-1 is False, Statement-2 is True Correct Option: B Both the statement-1 and -2 are correct but the statement-2 is not the correct explanation for statement-1. The correct explanation is: The oxygen atom released from decomposition of responsible for photochemical smog. combines with hydrocarbon to form harmful compounds Question ID: 5862 Q 76.The following question contains two statements. Choose one of the options below: Statement 1: Particular pollution can be prevented by passing the flue gases through electrostatic precipitator. Statement 2 : Electrostatic precipitator remove the negatively charged dust particles by coagulation. A. Statement-1 is True, Statement -2 is true, Statement - 2 is a correct explanation for Statement -1 B. Statement -1 is True, Statement -2 is true, Statement-2 is not a correct explanation for Statement-1

33 C. Statement-1 is True, Statement-2 is False D. Statement-1 is False, Statement-2 is True Both the statements-1 and -2 are true and the statement-2 is a correct explanation for statement-1. Question ID: 5863 Q 77.The following question contains two statements. Choose one of the options below: Statement 1: A polluted water sample has higher BOD than clean water. Statement 2 : Polluted water requires greater among of dissolved oxygen for decomposing the organic water. A. Statement-1 is True, Statement -2 is true, Statement - 2 is a correct explanation for Statement -1 B. Statement -1 is True, Statement -2 is true, Statement-2 is not a correct explanation for Statement-1 C. Statement-1 is True, Statement-2 is False D. Statement-1 is False, Statement-2 is True Both the statements-1 and -2 are true and the statement-2 is a correct explanation for statement-1.