SSC Ecology And Environment Sample Paper NCERT Sample Paper-3

  • question_answer
    Consider the following statements
    1. As a greenhouse gas (GHG) methane is even more harmful than carbon dioxide
    2. Methane has been included in the list of six GHGs in Kyoto Protocol. Which of the statements given above is/are correct?

    A)  1 only 

    B)  2 only

    C)  Both 1 and 2    

    D)  neither 1 nor 2

    Correct Answer: C

    Solution :

    [c] The six main greenhouse gases are - ? Carbon dioxide \[(C{{O}_{2}});\] ? Methane \[(C{{H}_{4}});\] ? Nitrous oxide \[({{N}_{2}}O);\] ? Hydrofluorocarbons (HFCs); ? Perfluorocarbons (PFCs); and ? Sulphur hexafluoride \[(SF6).\] Methane \[(C{{H}_{4}})\] is the second most important greenhouse gas. \[C{{H}_{4}}\]is more potent than \[C{{O}_{2}}\] because the radiative forcing produced per molecule is greater. In addition, the infrared window is less saturated in the range of wavelengths of radiation absorbed by \[C{{H}_{4}},\] so more molecules may fill in the region,

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