RAJASTHAN PMT Rajasthan - PMT Solved Paper-2008

  • question_answer
    When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

    A)  slightly lower than that of rain water without thunderstorm

    B)         slightly higher than that when the thunderstorm is not there

    C)         uninfluenced by occurrence of thunderstorm

    D)         which depends on the amount of dust in air

    Correct Answer: A

    Solution :

    During thunderstorm, there is formation of \[NO\] which changes to \[N{{O}_{3}}\] and ultimately to \[HN{{O}_{3}}\] (acid-rain).                 \[{{N}_{2}}+{{O}_{2}}\xrightarrow{{}}NO\xrightarrow{{{O}_{2}}}N{{O}_{2}}\]                 \[\xrightarrow{{}}{{N}_{2}}{{O}_{5}}\xrightarrow{{{H}_{2}}O}HN{{O}_{3}}(pH<7)\]


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