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  9. Q27

TNPSC Group-I 2021 · Question 27 of 148

The pollutant which causes impairment in plant metabolism is

Environment - Pollution

  1. ANitrous oxide
  2. BCarbon dioxide
  3. CSulphur dioxideCorrect
  4. DCarbon monoxide

Answer: C. Sulphur dioxide

Explanation

Sulphur dioxide impairs plant metabolism, causing chlorosis and reduced photosynthesis.

Source: TNPSC Group-I Prelims (held 3 Jan 2021) - official paper via examrace.com

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