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 In Antarctica ozone depletion is due to the formation of following compound Acrolein Peroxy acetyl nitrate SO<sub>2</sub>and SO<sub>3</sub> Chlorine nitrate
2 Pick up the correct statement CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog Classical smog has an oxidizing character while the phtochemical smog is reducing in character Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours During formation of smog the level of ozone in the atmosphere goes down
3 Which of the following is not an air N<sub>2</sub> N<sub>2</sub>O NO CO
4 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere? Fullerences Freons Polyhalogens Ferrocene
5 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value Uninfluenced by occurrence of thuderstorm Which depends on the amount of dust in air Slightly lower than that of rain water without thunderstorm Slighlty higher than that when the thunderstom is not there
6 Result of ozone hole is Green house effect Global warming Acid rain UV rays reach the earth
7 Photochemical smog is caused by CO CO<sub>2</sub> O<sub>3</sub> NO<sub>2</sub>
8 As it passes into food chain, the concentration of DDT Remains same Decreases Increases Unpredictable
9 Mottling of teeth is due to presence of an element in drinking water Mercury Fluorine Boron Chlorine
10 Water is often treated with chlorine to Increase oxygen content Kill germs Remove hardness Remove suspended particles
11 Environmental pollution affects Biotic components Plants only Man only Biotic and abiotic components of environment
12 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 Baloons and turbo-prop aeroplanes
13 DDT is Biodegradable pollutant Nondegradable pollutant Not a pollutant An antibiotic
14 Depletion of ozone layer is due to Oxides of nitrogen Oxides of carbon Oxides of sulphur None of the above
15 Most hazardous metal pollutant of automobile exhaust is Mercury Lead Cadmium Copper
16 Ozone hole refers to Hole in ozone layers Reduction in thickness of ozone layer in stratosphere Reduction of thickness of ozone in troposphere Increase concentration of ozone
17 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due Combining with oxygen to form carbon dioxide Destruction of hemoglobin Preventing reaction between oxygen and hemoglobin Forming stable compound with hemoglobin
18 Swage water is purified by Microorganisms Light Fishes Aquatic plants
19 Phosphate pollution is caused by Weathering of phosphate rocks only Agricultural fertilizers Phosphate rocks and sewage Sewage and agricultural fertilizers
20 Ozone hole is maximum over Europe Antarctica Asia Africa
21 Water pollution is mainly due to Sulphure dioxide Carbon dioxide Oxygen Industrial discharges
22 Eutrophication causes reduction in Dissolved hydrogen Dissolved oxygen Dissolved salts All the above
23 Chloroflurocarbon releases a chemical harmful to ozone Fluorine Chlorine Nitrogen peroxide Sulphure dioxdie
24 Increasing skin cancer and high mutation rate are due to Acid rain Ozone depletion CO pollution CO<sub>2</sub>Pollution
25 Biodegradable pollutant is Plastic Asbestos Sewage Mercury
26 Soil salinity can be measured by Calorimeter Potometer Porometer Conducitvity meter
27 Which one is the major reason for pollution in high cities? Fossil fuel Acid rain Heat dispersion None of the above
28 BOD is Biological oxygen deficit Biosphere oxygen demand Biological oxygen demand None of the above
29 Which one is the most toxic? Carbon CO CO<sub>2</sub> SO<sub>2</sub>
30 UV radiations bring about Skin cancer Mouth cancer Lung cancer Liver cancer
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