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CMC Medical CMC-Medical VELLORE Solved Paper-2010

  • question_answer
    The chemical equivalents of copper and silver are 32 and 108 respectively. When copper and silver voltameters are connected in series and electric current is passed through for sometime, 1.6 g of copper is deposited. Then, the mass of silver deposited will be

    A)  3.5 g                                     

    B)  2.8 g

    C)  5.4 g                                     

    D)  6.2 g

    E)  None of these

    Correct Answer: C

    Solution :

                    From Faradays law, \[\frac{m}{E}=\]constant where m = mass of substance deposited E = chemical equivalent \[\frac{{{m}_{2}}}{{{m}_{1}}}=\frac{{{E}_{2}}}{{{E}_{1}}}\] \[{{m}_{2}}=\frac{108}{32}\times 1.6\]      \[=5.4\,g\]


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