BVP Medical BVP Medical Solved Paper-2002

  • question_answer Time required to deposit 100 g of \[Al\] from an electrolyte cell containing \[A{{l}_{2}}{{O}_{3}}\] by using a current of 125 amperes is:

    A)  4820 sec             

    B)  8240.24 sec

    C)  8577.78 sec       

    D)  6420.44 sec

    Correct Answer: C

    Solution :

                     \[A{{l}^{+3}}+3{{e}^{-}}\xrightarrow{{}}Al\] \[\therefore \]  \[E=\frac{atomic\,weight}{3}=\frac{27}{3}=9\] \[W=\frac{E.i.t.}{96500}\] \[100=\frac{9\times 125\times t}{96500},t=\frac{96500\times 100}{9\times 125}\] \[t=8577.78\] second

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