ECAT Chemistry Chapter 27 Environmental Chemistry Online Test With Answers

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ECAT Chemistry Chapter 27 Environmental Chemistry Online Test

Sr. # Questions Answers Choice
1 B.O.D is connected with Organic matter Microbes Mircrobes and organic matter None of the above
2 Drained sewage has B.O.D More than that of water Less than that of water Equal to that of water None of the above
3 Drawback DDT as presticide is I becomes ineffective after some time It is less effective than others It is not easily/rapidly degraded in nature Its high cost
4 Carbon monoxide is harmful to human beings as it Is carcinogenic Is antagonistic to CO<sub>2</sub> Has higher affinity for hemoglobin as compared to oxygen Is destructive to O<sub>3</sub>
5 Air pollution is not caused by Pollen grains Hydroelectric power Industries Automobiles
6 Which causes water pollution? Smoke/fly ash Automobile exhausts Aeroplnes 2,4-D and pesticides
7 Chief source of water and soil pollution is Mining Thermal power plant Agro-industry All the above
8 Pollution is Removal of top soill Release of toxic/undesirable materials in enevironment Conversation of energy All the above
9 Acid rain is due to increase in atmospheric concentration of Ozone and dust CO<sub>2</sub>and CO SO<sub>3</sub>and CO SO<sub>2</sub>and NO<sub>2</sub>
10 Classical smog occurs in palces of Excess SO<sub>2</sub> Low temperature High temperature Excess NH<sub>3</sub>
11 Shahi Qilla may be destroyed by Flood in Ravi Temperature mediated spoilage of marble Air pollutants from Lahore chemical industries All the above
12 Ultraviolet radiation from sun causes a reaction that produces Fluorides Carbon monoxide Sulphur dioxide Ozone
13 Which of the following forms a toxic substance in blood by combing with hemoglobin? Carbon dioxide Carbon monoxide Oxygen Methane
14 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen? Ozone Nitrous oxide Sulphure dioxide Carbon monoxide
15 Ozone depletion in stratosphere shall result in Forest fires Increased incidence of skin cancer Global warming None of the above
16 Increased asthmatic attacks in certain seasons are related to Inhalation of seasonal pollen Eating of seasonal vegetables Low temperature Wet and dry environment
17 Domestic waste mostly constitutes Non-biodegradable pollution Biodegradable pollution Effluents Air pollution
18 Burning of fossil fuels is the main source of pollution Nitrogen oxide Nitric oxide Nitrous oxide Sulphur dioxide
19 Atomospheric pollutant is CO<sub>2</sub> CO O<sub>2</sub> N<sub>2</sub>
20 Spraying of DDT produces pollution of Air Air and water Air and soil Air, water and soil
21 Acid rains are produced by Excess NO<sub>2</sub>and SO<sub>2 </sub>from burining fossil fuels Excess production of NH<sub>3</sub>by industry and coal gas Excess release of carbon monoxide by incomplete combustion Excess formation of CO<sub>2</sub>by combustion and animal respiration
22 Carbon monoxide is pollutant as it Inactivates nerves Inhibits glycolysis Combines with oxygen Combines with hemoglobin
23 SO2and NO2produce pollution by increasing Alkalinity Acidity Neutrality Buffer action
24 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is Mercury Lead Nitrogen oxide Sulphuric oxide
25 Sulphur dioxide affects Cell wall Plasmodesmata All membrane systems Nucleus
26 Cyclone collector is used for minimizing Radioactive pollution Air pollution Noise pollution Water pollution
27 Minamata disease is due to pollution of Organic waste into drinking water Oil spill in water Industrial waste containing mercury into fishing water Arsenic into the atmosphere
28 Which one is not a pollutant normally? Hydrocarbons Carbon dioxide Carbon monoxide Sulphur dioxide
29 Chief air pollutant which is likely to deplete ozone layer Sulphure dioxide Carbon dioxide Nitrogen oxides and chloro fluorocarbons
30 Atmosphere of big/metropolitan cities is polluted most by Automobile exhausts Pesticide residue Household waste Radio-active fall out
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