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  9. Q38

CGPSC 2020 · Question 38 of 100

What will be the decreasing order of the following which contribute to the ‘Greenhouse effect’?

General Knowledge

  1. ACO 2> CH 4> CFCs > N 2O
  2. BCH 4> CO 2> CFSs > N 2O
  3. CCO 2> CFCs > CH 4> N 2O
  4. DCO 2> CH 4> N 2O > CFCsCorrect

Answer: D. CO 2> CH 4> N 2O > CFCs

Explanation

This sequence highlights that while CFCs are very potent, their decreasing presence in the atmosphere means that nitrous oxide, with its ongoing emissions and high potency, now contributes more to the current overall greenhouse effect than CFCs. Therefore, the correct answer is CO 2 > CH 4 > N 2 O > CFCs.

Source: CGPSC 2020 official paper

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