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BCECE Engineering BCECE Engineering Solved Paper-2013

  • question_answer
    \[{{\text{H}}_{\text{2}}}\]gas is liberated at cathode and anode both by electrolysis of the following solution except in

    A) NaCI                     

    B)        NaH                      

    C) LiH                         

    D)        HCOONa

    Correct Answer: B

    Solution :

    In Nelsons cell, \[{{H}_{2}}\]gas is liberated at cathode wheres \[C{{l}_{2}}\]gas is liberated at anode, on electrolysis of solution of NaCI. \[NaClN{{a}^{+}}+C{{l}^{-}}\] \[{{H}_{2}}O{{H}^{+}}+O{{H}^{-}}\] at cathode \[{{H}^{+}}+{{e}^{-}}\xrightarrow{{}}H\] \[H+H\xrightarrow{{}}{{H}_{2}}\uparrow \] at anode \[C{{l}^{-}}\xrightarrow{{}}Cl+{{e}^{-}}\] \[Cl+Cl\xrightarrow{{}}C{{l}_{2}}\uparrow \]


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