Environmental Science and Ecology - Mock Test 6

Question 51

Which gas contributes most to green house effect

A) CFC B) Freon C) COâ‚‚ D) CHâ‚„

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Question 52

Atmosphere of big/metropolitan cities is polluted most by

A) automobile exhausts B) pesticide residues C) household wastes D) radioactive fall-out

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Question 53

Most hazardous metal pollutant of automobile exhausts is

A) mercury B) cadmium C) lead D) copper

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Question 54

Gas released during Bhopal tragedy was

A) methyl isocyanate B) potassium isothiocyanate C) sodium isothiocyanate D) ethyl isothiocyanate

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Question 55

Green house effect is warming due to

A) infra-red rays reaching earth B) moisture layer in atmosphere C) increase in temperature due to increase in carbon dioxide concentration of atmosphere D) ozone layer of atmosphere

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Question 56

Acid rains are produced by

A) excess emissions of NO₂ and SO₂ from burning fossil fuels B) excess production of NH₃ by industry and coal gas C) excess release of carbon monoxide by incomplete combustion D) excess formation of CO₂ by combustion and animal respiration

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Question 57

DDT is

A) a non-degradable pollutant B) a bio-degradable pollutant C) not a pollutant D) an antibiotic

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Question 58

The COâ‚‚ content in the atmospheric air is about

A) 0.03% B) 0.34% C) 3.34% D) 6.50%

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Question 59

Ultraviolet radiations from sunlight causes a reaction that produces

A) fluorides B) carbon monoxide C) sulphur dioxide D) ozone

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Question 60

Major aerosol pollutant in jet plane emission is

A) sulphur dioxide B) carbon monoxide C) methane D) fluorocarbon

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