Which of the following statements are correct ?

(I) Benzene hexachloride (BHC) is a non-biodegradable pollutant.
(ii) Anthropogenic air pollutants are natural in origin.
(iii) Carbon monoxide is a primary air pollutant.
(iv) Sulphur dioxide causes brown air effect during traffic congestion in cities.

Q. Which of the following is/are true?
I. Benzene hexachloride is a non-biodegradable pollutant.
II. Anthropogenic air pollutants are natural in origin.
III. Carbon monoxide is a primary air pollutant.
IV. Sulphur dioxide causes brown air effect during traffic congestion in cities.

Q.

Match the following air pollutants with their major source.

(i) Carbon monoxide (ii) Carbon- dioxide (iii) Sulphur dioxide

(a) Coal burn (b) Fossil fuels (c) Automobiles

Q. Give two effects of each of the following air pollutants. [5 MARKS]

i. Carbon monoxide
ii. Sulphur dioxide
iii. Nitrogen oxides
iv. Ground level ozone
v. particulate matter

Q. Read the following statements carefully.
(i) An electrostatic precipitator removes particulate matter by imposing negative charge on them.
(ii) Catalytic converters convert unburnt hydrocarbons into carbon dioxide and water.
(iii) Peroxyacyl nitrates (PAN) is a secondary air pollutant.
(iv) DDT is a non-biodegradable pollutant.
Which of the above statements are incorrect?

Q.

Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent?

(a) carbon dioxide

(b) nitrogen monoxide

(c) carbon monoxide

(d) sulphur dioxide