MCQs on Environmental Issues- 4

1. Halon – 1301 is a

(A) Fire extinguisher
(B) Solvent
(C) Refrigerant
(D) Aerosol propellant

2. Which of the following is a primary pollutant in atmospheric air?

(A) Cl2
(B) SO3
(C) Nitrates
(D) Sulphates

3. The most toxic among the chlorinated hydrocarbons is

(A) Aldrin
(C) Endrin
(D) Heptachlor

4. Agent orange is a

(A) Weedicide
(B) Fungicide
(C) Nematicide
(D) Rodenticide

5. Major source of SO2 is

(A) Cement Industry
(B) Forest fires
(C) Thermal Power Stations
(D) Volcanic activity

6. Blue baby syndrome is caused by

(A) Carbon monoxide
(B) Nitrate
(C) Fluoride
(D) Mercury

7. Assertion (A): The ecosystem surrounding a river gets damaged due to construction of a dam.
Reason (R): The area gets inundated with large volume of water.

Identify the correct answer:

(A) Both (A) and (R) are true, with (R) being the correct explanation.
(B) Both (A) and (R) are true, but (R) is not the correct explanation.
(C) (A) is true, but (R) is wrong.
(D) Both (A) and (R) are wrong.

8. Acid drainage is more in mining of

(A) Granite
(B) Bauxite
(C) Lime stone
(D) Base metal sulphide

9. Coal mining areas are affected by

(i) Land subsidence
(ii) Fire hazard
(iii) Radioactive waste
(iv) Air pollution


(A) (i) and (ii)
(B) (i), (ii) and (iii)
(C) (i), (ii) and (iv)
(D) (i), (ii), (iii) and (iv)

10. Maximum carbon in the world is found in

(A) Oceans
(B) Coal mines
(C) Antarctica
(D) Forests



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