| 1. Carbon dioxide \[(C{{O}_{2}})\] | 2. Methane\[(C{{H}_{4}})\] |
| 3. Nitrous oxide\[({{N}_{2}}O)\] | 4. Hydrofluoro carbons(HFCs) |
| 5. Perfluoro carbons(PFCs) | 6. Sulphur hexafluoride\[(S{{F}_{6}})\] |
| 7. Nitrogen trifluoride\[(N{{F}_{3}})\] | 8. Sulphur dioxide \[(S{{O}_{2}})\] |
A) 1, 2, 3 and 8
B) 4, 5, 6 and 8
C) 1, 2, 3, 4, 5, 6 and 7
D) All of these
Correct Answer: C
Solution :
[c] Greenhouse Gases or GHG in Annex A to the protocol now include 7 GHGs in the list. They are \[(C{{O}_{2}})\]\[(C{{H}_{4}})\]\[({{N}_{2}}O)\]HFCs, PFCs,\[(S{{F}_{6}})\]and \[(N{{F}_{3}})\] Nitrogen trifluoride is the last one to be included in the list. It is mostly used in electronics industry during various processes including plasma etching is a process that is used to fabricates ICs, cleaning silicon, chips, manufacture of LCD panel. It is highly effective in trapping atmospheric heat second only to Sulphur hexafluoride \[(S{{F}_{6}})\].
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