JEE Main & Advanced Sample Paper JEE Main - Mock Test - 23

  • question_answer
    In the following reaction \[4P+3KOH+3{{H}_{2}}O\to 3K{{H}_{2}}P{{O}_{2}}+P{{H}_{3}}\]

    A) phosphorus is both oxidised and reduced.

    B) only phosphorus is reduced.

    C) phosphorus is not oxidized

    D) none of these

    Correct Answer: A

    Solution :

    \[4P\,+3KOH\,+3{{H}_{2}}O\,\,\to K{{H}_{2}}P{{O}_{2}}+P{{H}_{3}}\] \[\operatorname{O}.N\,\,of\,\,P=0\] in \[K{{H}_{2}}P{{O}_{2}}\] it is +1, in \[P{{H}_{3}}\] it is -3. Hence P is oxidised and reduced.

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