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  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2005

  • question_answer
    The chemical equivalent of silver is 108. If the current in silver voltameter is 2 A; then the during time in collecting of 27 g silver will be

    A)  8.75 h            

    B)  6.70 h

    C)  3.35 h           

    D)  12.50 h

    Correct Answer: C

    Solution :

     From Faraday's 1st law of electrolysis \[m=ZIt=\frac{E}{F}It\] Or \[m=\frac{A}{FV}It\] Or \[t=\frac{mFV}{IA}\] \[(\because V=1)\] \[=\frac{27\times 96500\times 1}{2\times 108}\] \[=12062.5s\] \[=3.35h\]


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