JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry Question Bank Atomic Molecular and Equivalent masses

  • question_answer What should be the equivalent weight of phosphorous acid, if P=31; O=16; H=1

    A)                 82          

    B)                 41

    C)                 20.5       

    D)                 None of these

    Correct Answer: B

    Solution :

               The acid is dibasic.                    Molecular weight of \[{{H}_{3}}P{{O}_{3}}\]\[=3+31+48=82\]                                 \[\therefore \]  Equivalent weight \[=\frac{\text{Molecular weight}}{\text{Basicity}}=\frac{82}{2}\]= 41.

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