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JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    What is the oxidation number of iron in the compound \[[Fe{{({{H}_{2}}O)}_{5}}(NO)]S{{O}_{4}}\] [Pb. CET 2001]

    A) \[+2\]

    B) \[+3\]

    C) \[\pm 1\]

    D) \[\pm 4\]

    Correct Answer: A

    Solution :

    Applying the oxidation number rule in \[[Fe{{({{H}_{2}}O)}_{5}}(NO)]S{{O}_{4}}\] (\[\because \] \[{{H}_{2}}O\] and NO are neutral) \[[x+(0)\times 5+0]+(-2)=0\] \[x+0+0-2=0\] Þ  \[x=+2\] Hence, oxidation number of Fe is +2.


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