set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Statement I :
Coal-based thermal power stations contribute to acid-rain.
Statement II :
Oxides of carbon are emitted when coal burns.

a) Statement I is true but Statement II is false

b) Both Statement I and Statement II are individually true but Statement II is not the correct explanation of Statement I

c) Both Statement I and Statement II are individually true and Statement II is the correct explanation of Statement I

d) Statement I is false but Statement II is true

Question : 2

Frequent occurrence of water blooms in a lake indicates

a) oxygen deficiency

b) excessive nutrient availability

c) nutrient deficiency

d) absence of herbivores in the lake

Question : 3

Consider the following statements:

1. Use of fertilizers has role on water pollution
2. Excessive use of pesticides help to decrease water pollution.

a) 2 only

b) 1 only

c) 1 and 2

d) None

Question : 4

The greenhouse effect is because of the

a) presence of CO₂ only in the atmosphere

b) pressure of O₃ and CH₄ in the atmosphere

c) presence of gases, which in general are strong infrared absorbers, in the atmosphere

d) N₂O and chlorofluorohydrocarbons in the atmosphere

Question : 5

DDT is a –

a) antibiotics

b) biodegradable pollutant

c) non-biodegradable pollutant

d) none of the above

Question : 6

Which one of the following is another name of RDX?

a) Cyclohexane

b) Dextran

c) Cyanohydrin

d) Cyclonite