PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Fish die in water bodies polluted by sewage due to. Pathogens Clogging of gills by silt Reduction in dissolved oxygen Foul smell
2 Maximum desirable concentration of fluorides according to international standard is. 10-100 ppm 1 ppm 100-200 ppm 10-20 ppm
3 Disease caused by eating fish found in water contaminated with industrial waste having mercury is. Minamata disease Bright's disease Hashimoto's disease Osteoaclerosis
4 carbon monoxide is harmful to human beings as it. Is carcinogenic Is antagonistic to CO2 Has higher affinity for haemoglobin as compared to oxygen Is destructive to O3
5 Air pollution is not caused by Pollen grains Hydroelectric power Industries automobiles
6 Which of the following cause water pollution. Smoke Automobile exhausts Aeroplanes Silt and posticides
7 Eutrophication is process which involves Depletion of ozone layer Increase in the concentration of ozone in water Decrease in the concentration of dissolved oxygen in water by algae Decrease in the level of SO2 in air
8 Chief source of water and soil pollution in Mining of ores Thermal power plant Agro industry All the above
9 Which of the following is biodegradable pollutant. Domestic waste DDT Mercury salta Aluminum foil
10 Result of ozone hole is. Acid rain Global warming Increased amount of CO2 Greater exposure of earth to U.V. rays.
11 Photochemical smog consist of excessive amount of X in addition to aldehydes ketones, PAN etc. X is. Methane Carbon monoxide Ozone Carbondioxide
12 Photochemical smog is caused primarily by CO CO2 NO2 O3
13 The agricultural field that produces maximum methane gas into atmosphere is Wheat field Paddy field Cotton field Groundnut field
14 As it passes into food chain, the concentration of DDT Remains same Decreases Increases Unpredictable
15 Environmental pollution refers to. Peeling of top soil Dissipation of energy Release of toxic materials in environment None of the above
16 Acid rain is caused due to increase in the concentration of _______ in the atmosphere Ozone and dust CO2 and CO SO3 and CO SO2 and NO2
17 Which is not a pollutant from the exhaust of motor. Hydrocarbons Carbon monoxide NOx Fly ash
18 Classical smog occurs in place of. Excess concentration of SO2 Low temperature High temperature Excess concentration of ammonia
19 Which of the following pose threat to historical monument Taj. Floods in Yamuna river Temperature mediated spoilage of marble Air pollutants from Mathura refinery Weathering of marble
20 For an average exposure of 8 hours per day, the maximum permissible concentration limit of CO in the atmosphere is. 50 ppm 500 ppm 10<sup>3</sup> ppm 20 ppm
21 UV radiation from the sun causes a reaction in the atmosphere that leads to production Fluorides Carbon monoxide Sulphur dioxide Ozone
22 Which of the following is major sink for carbo monoxide. Water Soil Animal respiration Salts dissolved in ocean water
23 Which of the following reacts with hemoglobin of blood and produce toxic effect. Carbon dioxide Carbon monoxide Oxygen Carbon suboxide
24 Photochemical among is generally formed In early hours of winters Around mid day in summer months When intensity of solar radiation sis very low When concentration of particulate matter is very low.
25 The presence of which of the following in drinking water is responsible for mottling of teach. Mercury Iodine Chlorine Flourine
26 Water is often treated with chlorine to Increases oxygen content Kill germs Cause sedimentation Remove insoluble impurities.
27 Water pollution is due to Agricultural discharges Swages and other wastes Industrial effects All the above
28 Environmental pollution effects. Biotic component Plants only Humans only Both biotic and abiotic components of environment
29 Ozone layer of stratosphere requires protection from indiscriminate use of. Fungicides, insecticides, bactericides and medicines Aerosols and high flying jets Atomic explosions and industrial wastes Weather ballons
30 Peeling of ozone umbrella is due to. CFCa PAN CO2 Coal burning
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