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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Topic Test - Some Basic Concepts of Chemistry (8-5-21)

  • question_answer
    \[Ca{{(OH)}_{2}}+{{H}_{3}}P{{O}_{4}}\to CaHP{{O}_{4}}+2{{H}_{2}}O\] the equivalent weight of \[{{H}_{3}}P{{O}_{4}}\] in the above reaction is

    A) 21

    B) 27

    C) 38

    D) 49

    Correct Answer: D

    Solution :

    The equivalent weight of
    \[{{H}_{3}}P{{O}_{4}}=\frac{\text{molecular weight}}{2}\]
                \[\because \] mole wt of \[{{H}_{3}}P{{O}_{4}}\]= 3 + 31 + 64 = 98
                            \ \[\frac{98}{2}=49\]


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