UPSC General Studies Sample Paper General Studies Sample Paper-5

  • question_answer
    Which of the following free radicals or ions are capable of destroying ozone layer?       
    1. Chlorine ion              
    2. Hydroxyl radical                       
    3. Bromine ion              
    4. Nitric Oxide radical                     
    Select the correct answer using the codes given below.

    A)  1, 3 said 4                   

    B)  2 and 3            

    C)  1 and 4           

    D)  All of these   

    Correct Answer: D

    Solution :

    [d] Many free radicals and ions are capable of destroying ozone. The important varieties are Chlorine ion (Cl), Hydroxyl radical (OH), Bromine ion (Br) and Nitric Oxide radical (NO). All of these have both natural and man-made sources; at the present time, most of the OH and NO in the stratosphere is of natural origin, but human activity has dramatically increased the levels of chlorine and bromine.

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