Paper 1 · People, Development and Environment
UGC NET December 2021 June 2022 (12.07.2022) Shift-II
Arrange the following gases in increasing order of their contribution towards global warming.
- 1. Methane
- 2. Chlorofluorocarbons
- 3. Nitrous oxide
- 4. Carbon dioxide
A1, 2, 3, 4
B3, 2, 1, 4 ✓ Correct
C3, 1, 2, 4
D1, 3, 2, 4
Correct answer: (B) 3, 2, 1, 4 — The answer is the order 3, 2, 1, 4.
Explanation
★The answer is the order 3, 2, 1, 4.
★Nitrous oxide contributes the least of these to warming, which is item 3.
★Chlorofluorocarbons come next, which is item 2.
★Methane contributes still more, which is item 1.
★Carbon dioxide contributes the most, which is item 4.
★So the increasing order is nitrous oxide, chlorofluorocarbons, methane and carbon dioxide.
★So the answer is 3, 2, 1, 4.
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