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JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank Self Evaluation Test - The p-Block Elements (Group 15, 16, 17 & 18)

  • question_answer
    In nitroprusside ion, the iron and NO exist as \[F{{e}^{2+}}\] and \[N{{O}^{+}}\] rather than \[F{{e}^{3+}}\] and NO. These forms can be differentiated by

    A) estimating the concentration of iron.

    B) measuring the concentration of \[C{{N}^{-}}\]

    C) measuring the solid state magnetic moment.

    D) thermally decomposing the compound.

    Correct Answer: C

    Solution :

    [c] The nitroprusside ion is \[{{[Fe{{(CN)}_{6}}N{{O}^{+}}]}^{2-}}\] The magnetic moment measurements reveal the presence of 4 unpaired electrons in Fe which must be then in \[F{{e}^{2+}}\left( 3{{d}^{6}} \right)\] and not \[F{{e}^{3+}}\left( 3{{d}^{5}} \right)\]


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