JEE Main & Advanced Sample Paper JEE Main Sample Paper-4

  • question_answer
    In which of the following reaction \[{{H}_{2}}{{O}_{2}}\] is a reducing agent?

    A) \[2FeC{{l}_{2}}+2HCl+{{H}_{2}}{{O}_{2}}\to 2FeC{{l}_{3}}+2{{H}_{2}}O\]

    B) \[C{{l}_{2}}+{{H}_{2}}{{O}_{2}}\to 2HCl+{{O}_{2}}\]

    C) \[2Hl+{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+{{l}_{2}}\]

    D) \[{{H}_{2}}S{{O}_{3}}+{{H}_{2}}{{O}_{2}}\to {{H}_{2}}S{{O}_{4}}+{{H}_{2}}O\]

    Correct Answer: B

    Solution :

    \[C{{l}_{2}}+{{H}_{2}}{{\overset{-1}{\mathop{O}}\,}_{2}}\to 2HCl+{{\overset{0}{\mathop{O}}\,}_{2}}\]Oxidation state of oxygen changes from -1 \[({{H}_{2}}{{O}_{2}})\] to zero \[({{O}_{2}})\] i.e., \[{{H}_{2}}{{O}_{2}}\] getting oxidised and acting as reducing agent.

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