set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The pollutants which came directly in the air from sources are called primary pollutants. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants?

a) Hydrocarbon

b) Peroxyacetyl nitrate

c) CO

d) NO

Question : 2

Which of the following is not involved in the formation of photochemical smog?

a) NO

b) SO₂

c) Hydrocarbon

d) O₃

Question : 3

Identify the wrong statement in the following.

a) Greenhouse effect is responsible for global warming.

b) Ozone layer does not permit infrared radiation from the sun to reach the earth.

c) Chlorofluorocarbons are responsible for ozone layer depletion.

d) Acid rain is mostly because of oxides of nitrogen and sulphur.

Question : 4

The greatest affinity for haemoglobin is shown by which of the following :

a) CO

b) O₂

c) NO

d) CO₂

Question : 5

Living in the atmosphere of CO is dangerous because it

a) Dries up the blood

b) Reduces organic matter of tissues

c) Combined with O₂ present inside to form CO₂

d) Combines with haemoglobin and makes it incapable of absorbing oxygen

Question : 6

Which among the following statements is false?

a) The main reason for river water pollution is industrial and domestic sewage discharge

b) Surface water contains a lot of organic matter mineral nutrients and radioactive materials

c) Oil slick in sea water increases D.O. value

d) Oil spill in sea water causes heavy damage to fishery