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BVP Medical BVP Medical Solved Paper-2004

  • question_answer
    \[{{P}_{4}}+3NaOH+3{{H}_{2}}O\xrightarrow{{}}A+3Na{{H}_{2}}P{{O}_{2}}\]here, A is:

    A)  \[N{{H}_{3}}\]                                 

    B)  \[P{{H}_{3}}\]

    C)  \[{{H}_{3}}P{{O}_{4}}\]                                

    D)  \[{{H}_{3}}P{{O}_{3}}\]

    Correct Answer: B

    Solution :

                    This is the laboratory method of preparing phosphine gas. \[\underset{white}{\mathop{{{P}_{4}}}}\,+3NaOH+3{{H}_{2}}O\]                                 \[P{{H}_{3}}+3Na{{H}_{2}}P{{O}_{2}}\] In    this    reaction,    phosphorus disproportionate into phosphine and sodium hydrogen phosphite.


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