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JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Wet Test for Basic Radical

  • question_answer
    Conc. \[HN{{O}_{3}}\] is added before proceeding to test for group III members. This is to [NCERT 1974]

    A) Oxidise any remaining \[{{H}_{2}}S\]

    B) Convert ferrous ion into ferric ion

    C) Form nitrates which give granular ppts

    D) Increase ionisation of ammonium hydroxide

    Correct Answer: B

    Solution :

    HNO3 oxidises \[F{{e}^{2+}}\] to \[F{{e}^{3+}}\] otherwise \[F{{e}^{2+}}\] is not completely precipitated as hydroxide


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