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

  • question_answer The equivalent weight of \[MnS{{O}_{4}}\]is half its molecular weight when it is converted to                                                [IIT 1988; CPMT 1994]

    A)                 \[M{{n}_{2}}{{O}_{3}}\] 

    B)                 \[Mn{{O}_{2}}\]

    C)                 \[Mn{{O}_{4}}\] 

    D)                 \[MnO_{4}^{2-}\]

    Correct Answer: B

    Solution :

               \[\overset{+2}{\mathop{Mn}}\,S{{O}_{4}}\to \overset{+4}{\mathop{Mn}}\,{{O}_{2}}\]                    Change of valency \[=4-2=2\]                                 \[\therefore \] Equivalent weight \[=\frac{M}{2}\].

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