DUMET Medical DUMET Medical Solved Paper-2008

  • question_answer
    Which of the following substances acts as an oxidising as well as reducing agent?

    A)  \[N{{a}_{2}}O\]

    B)  \[SnC{{l}_{2}}\]

    C)  \[N{{a}_{2}}{{O}_{2}}\]

    D)  \[NaN{{O}_{2}}\]

    Correct Answer: D

    Solution :

    \[NaN{{O}_{2}}\] (sodium nitrite) act both as oxidising as well as reducing agent because in it N atom is in +3 oxidation state (intermediate oxidation state) Oxidising property \[2NaN{{O}_{2}}+2KI+2{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}N{{a}_{2}}S{{O}_{2}}\] \[+{{K}_{2}}S{{O}_{4}}+2NO+2{{H}_{2}}O+{{I}_{2}}\] Reducing property \[{{H}_{2}}{{O}_{2}}+NaN{{O}_{2}}\xrightarrow{{}}NaN{{O}_{3}}+{{H}_{2}}O\]


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