UPSC 2022 › Environment & Ecology › Pollution & Waste Management

2 questions · 2022 · answers as per the UPSC key

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UPSC 2022 · Q44 · Environment & Ecology › Pollution & Waste Management · Save

In the context of WHO Air Quality Guidelines, consider the following statements :

  1. The 24-hour mean of PM2.5 should not exceed 15 μg/m3 and annual mean of PM2.5 should not exceed 5 μg/m3.
  2. In a year, the highest levels of ozone pollution occur during the periods of inclement weather.
  3. PM10 can penetrate the lung barrier and enter the bloodstream.
  4. Excessive ozone in the air can trigger asthma.

Which of the statements given above are correct ?

(a) 1, 3 and 4
(b) 1 and 4 only
(c) 2, 3 and 4
(d) 1 and 2 only
Show answer
Answer: (b) 1 and 4 only
UPSC 2022 · Q100 · Environment & Ecology › Pollution & Waste Management · Save

Consider the following :

  1. Carbon monoxide
  2. Nitrogen oxide
  3. Ozone
  4. Sulphur dioxide Excess of which of the above in the environment is/are cause(s) of acid rain ?
(a) 1, 2 and 3
(b) 2 and 4 only
(c) 4 only
(d) 1, 3 and 4
Show answer
Answer: (b) 2 and 4 only