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BHU PMT BHU PMT (Screening) Solved Paper-2009

  • question_answer
    Same current is being passed through a copper voltameter and a silver voltameter. The rate of increase in weights of the cathode of the two voltameters will be proportional to

    A)  atomic masses                

    B)  atomic number

    C)   relative densities          

    D)  None of these

    Correct Answer: A

    Solution :

                     If same quantity of electricity is passed through different electrolytes, masses of the substance deposited at the respective cathodes are directly proportional to  their chemical equivalents ie, \[M\propto E\] \[\Rightarrow \]               \[\frac{{{M}_{1}}}{{{M}_{2}}}=\frac{{{E}_{1}}}{{{E}_{2}}}\] Chemical equivalent E is also known as equivalent weight in gram Also        \[E=\frac{Atomic\text{ }mass\text{ }}{Valency\text{ }(V)}\]


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