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NEET Chemistry Electrochemistry / विद्युत् रसायन Question Bank Self Evaluation Test - Electrochemistry

  • question_answer
    In electrolytic reduction of a nitroarene with 50% current efficiency 20.50 g of the compound is reduced by \[2\times 96500\text{ }C\] of electric charge. The molar mass of the compound is

    A) 123.0 g             

    B) 61.5 g

    C) 10.2 g                          

    D) 20.5 g

    Correct Answer: A

    Solution :

    [a] \[ArN{{O}_{2}}+6{{H}^{+}}+6{{e}^{-}}\xrightarrow{{}}ArN{{H}_{2}}+2{{H}_{2}}O\] \[W=\frac{E.wt\times Q}{96500};20.50=\frac{M}{6}\times \frac{2\times 96500}{96500}\times \frac{50}{100}\] \[\therefore \text{ }M=123.0\text{ }g\]


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