Environmental Science and Ecology - Mock Test 7

Question 61

Which one is not a pollutant normally

A) Hydrocarbons B) Carbon dioxide C) Carbon monoxide D) Sulphur dioxide

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Question 62

A renewable exhaustible natural resource is

A) coal B) petroleum C) minerals D) forest

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Question 63

The most common indicator organism that represents polluted water is

A) E. coli B) Pseudomonas. typhi C) Chlorella D) Entamoeba

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Question 64

Air pollution effects are usually found on

A) leaves B) flowers C) stems D) roots

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Question 65

Domestic waste contains

A) non-biodegradable pollutants B) biodegradable pollutants C) hydrocarbons D) none of the above

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Question 66

Most harmful environmental pollutants are

A) biodegradable compounds B) corrosive agents C) non biodegradable chemicals D) all of the above

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Question 67

The expanded form of DDT is

A) dichloro diphenyl trichloroethane B) dichloro diethyl trichloroethane C) dichloro dipyrydyl trichloroethane D) dichloro diphenyl tetrachloroacetate

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Question 68

Full form of BOD is

A) Biological organism death B) Biotic oxygen demand C) Biochemical oxygen demand D) Biological organization day

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Question 69

Lichens are important in the studies on atmospheric pollution because they

A) can grow in polluted atmosphere B) can readily multiply in polluted atmosphere C) efficiently purify the atmosphere D) are very sensitive to pollutants like sulphur dioxide

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Question 70

Which gas of the atmosphere holds up ultraviolet rays

A) O₂ B) O₃ C) N₂ D) CH₄

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