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

  • question_answer
    The chemical formula for certain pyrophosphate is \[C{{a}_{2}}{{P}_{2}}{{O}_{7}}\] , the formula of its ferric pyrophosphate will be

    A) \[F{{e}_{2}}{{({{P}_{2}}{{O}_{7}})}_{3}}\]

    B) \[F{{e}_{4}}({{P}_{4}}{{O}_{14}})\]

    C) \[F{{e}_{4}}{{({{P}_{2}}{{O}_{7}})}_{3}}\]

    D) \[F{{e}_{3}}P{{O}_{4}}\]

    Correct Answer: C

    Solution :

    \[C{{a}_{2}}{{P}_{2}}{{O}_{7}}\,\to \,2C{{a}^{++}}+{{({{P}_{2}}{{O}_{7}})}^{4-}}F{{e}^{+3}}+{{({{P}_{2}}{{O}_{7}})}^{4-}}\,\to F{{e}_{4}}{{({{P}_{2}}{{O}_{7}})}_{3}}\]


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