AIIMS AIIMS Solved Paper-2004

  • question_answer
    Nitrogen oxides produced from the emission of automobiles and power plants are the source of fine air borne particles which lead to:

    A)  photochemical smog

    B)  dry acid deposition

    C)  industrial smog

    D)  wet acid deposition

    Correct Answer: B

    Solution :

    Depending on climatic conditions, tiny particles of these substances may be airborne for a while and then fall to earth as dry acid deposition. Most sulphur and nitrogen dioxides dissolve in atmospheric water to form weak solutions of \[{{H}_{2}}S{{O}_{4}}\] and \[HN{{O}_{3}}\]. Winds can distribute them over great distances before they fall to earth in rain and now, this is called wet acid deposition.


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