Environmental Science and Ecology - Mock Test 2

Question 11

Maximum bioconcentration of pesticide residues is usually found in birds that exclusively feed on

A) fish B) seeds C) worms D) meat

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Question 12

Which important green house gas other than methane is being produced from the agricultural fields

A) Sulphur dioxide B) Ammonia C) Nitrous oxide D) O3

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Question 13

Sound becomes hazardous noise pollution at level

A) above 30 dB B) above 80 dB C) above 100 dB D) above 120 dB

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Question 14

The main cause of water pollution is

A) soap B) industrial effluents C) smoke D) ammonia

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Question 15

CFC are not recommended to be used in refrigerators because they

A) increase temperature B) affect environment C) affect aquatic life D) affect human body

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Question 16

Sewage water can be purified for recycling with the action of

A) aquatic plants B) penicillin C) micro-organisms D) fishes

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Question 17

Smog is a common pollutant in places having

A) high temperature B) low temperature C) excessive SO2 in the air D) excessive ammonia in the air

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Question 18

Which of the following is not an air pollutant

A) water vapour B) carbon monoxide C) methane D) oxygen

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Question 19

Green house effect means

A) increase in the temperature of earth due to high concentration of Oâ‚‚ B) increase in the temperature of earth due to high concentration of NOâ‚‚ C) increase in the temperature of earth due to high concentration SOâ‚‚ D) increase in temperature of earth due to high concentration of COâ‚‚

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Question 20

The major source of noise pollution, world wide is due to

A) office equipments B) transport system C) sugar, textile and paper industries D) oil refineries and thermal power plants

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