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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
    The passivity of iron in concentrated nitric acid is due to [MP PMT 1994]

    A) Ferric nitrate coating on the metal

    B) Ammonium nitrate coating on the metal

    C) A thin oxide layer coating on the metal

    D) A hydride coating on the metal

    Correct Answer: C

    Solution :

    A thin layer of \[F{{e}_{3}}{{O}_{4}}\] is formed on the Fe metal


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