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

  • question_answer
    A mixture when heated with conc. \[{{H}_{2}}S{{O}_{4}}\] with \[Mn{{O}_{2}}\] brown fumes are formed due to

    A) \[B{{r}^{-}}\]

    B) \[NO_{3}^{-}\]

    C) \[C{{l}^{-}}\]

    D) \[{{I}^{-}}\]

    Correct Answer: A

    Solution :

    It is a lab method for the preparation of \[B{{r}_{2}}\] e.g. \[2\ KBr\ +\ Mn{{O}_{2}}\ +\ {{H}_{2}}S{{O}_{4}}\ \to \]\[\underset{\text{Brown}\ \text{gas}}{\mathop{B{{r}_{2}}}}\,\ +\ 2\ KHS{{O}_{4}}\ +\ MnS{{O}_{4}}\]


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