UPSC General Studies Sample Paper General Studies Sample Paper-5

  • question_answer
    According to the newly amended Kyoto Protocol, which among the followings are considered as Greenhouse Gases?                                                                    
    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 \[(S{{O}_{2}})\]
    Select the correct answer using the codes given below.                                    

    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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