Pollution MCQ

Question 1

Consider the following statements:
1. Ground-level ozone is emitted directly into the air by cars and power plants.
2. Ozone is a gas composed of three atoms of oxygen.
3. Stratospheric ozone protects living things from ultraviolet radiation from the Sun.
Which of the statements given above are correct?

Accepted Answer

Statement 1 is incorrect: ground-level ozone is not emitted directly; it forms through reactions between NOx and VOC in sunlight. Statement 2 is correct: ozone has three oxygen atoms. Statement 3 is correct: stratospheric ozone protects living things from ultraviolet radiation.

Question 2

Consider the following statements:
1. The Plastic Waste Management Rules, 2016 increased the minimum thickness of plastic carry bags from 40 microns to 50 microns.
2. The Rules aimed to expand applicability from municipal areas to rural areas.
3. The Rules introduced producer and brand-owner collect-back responsibility under extended producer responsibility.
4. The Rules imposed a blanket ban on the use of plastic all over India because a complete substitute had been found.
Which of the statements given above are correct?

Accepted Answer

Statement 1 is correct: the minimum thickness was increased from 40 to 50 microns. Statement 2 is correct: the Rules aimed to extend applicability to rural areas. Statement 3 is correct: collect-back based on extended producer responsibility is stated. Statement 4 is incorrect: the PIB note explicitly says a complete substitute had not been found and a blanket ban was impractical and undesirable.

Question 3

Consider the following statements:
1. Carbon monoxide is a colorless and odorless gas.
2. The greatest outdoor sources of carbon monoxide are vehicles or machinery that burn fossil fuels.
3. Carbon monoxide increases oxygen transport in the bloodstream.
Which of the statements given above are correct?

Accepted Answer

Statement 1 is correct: carbon monoxide is colorless and odorless. Statement 2 is correct: EPA identifies fossil-fuel-burning vehicles or machinery as the greatest outdoor sources. Statement 3 is incorrect: carbon monoxide reduces, rather than increases, oxygen transport in blood.

Question 4

Consider the following statements:
1. The Central Pollution Control Board was constituted under the Water (Prevention and Control of Pollution) Act, 1974.
2. The CPCB was entrusted with powers and functions under the Air (Prevention and Control of Pollution) Act, 1981.
3. The principal functions of CPCB are limited to wildlife conservation and do not include water or air pollution control.
Which of the statements given above are correct?

Accepted Answer

Statement 1 is correct: CPCB was constituted under the Water Act, 1974. Statement 2 is correct: it was later entrusted with powers and functions under the Air Act, 1981. Statement 3 is incorrect: CPCB's principal functions include prevention, control and abatement of water pollution and improvement of air quality.

Question 5

Consider the following statements about Pollution:
1. Noise-rule implementation requires States to categorize areas into industrial, commercial, residential or silence zones.
2. An area of not less than 100 metres around hospitals, educational institutions and courts may be declared a silence zone.
3. Noise levels in a zone may exceed the Schedule standards if the source is vehicular movement.
4. The authority is responsible for enforcement of noise-pollution control measures and compliance with noise standards.
Which of the statements given above are correct?

Accepted Answer

Statements 1, 2 and 4 are correct under the Noise Pollution Rules as reproduced by CPCB. Statement 3 is false because the State must take measures including for vehicular noise and ensure existing noise levels do not exceed the prescribed standards.

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