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NEET Sample Paper NEET Sample Test Paper-54

  • question_answer
    In the electrolysis of a \[CuS{{O}_{4}}\] solution, how many grams of \[Cu\] are plated out on the cathode in the time that is takes to liberate 5.6 litre of \[{{O}_{2}}\](g), measured at STP, at the anode?

    A) 31.75

    B)               14.2

    C) 4.32                             

    D) None of these

    Correct Answer: A

    Solution :

    \[Moles\,\,of\,\,{{O}_{2}}\,\,=\,\,\frac{5.6}{22.4}\,\,=\,\,\frac{1}{4}\,\] \[\therefore \,\,\,\,\,Eq\,\,of\,\,{{O}_{2}}=\frac{1}{4}\,\,\times \,\,4\,\,=\,\,1\] \[\therefore \,\,\text{ }Eq\text{ }of\,\,Cu\,\,=\,\,1\] \[\frac{w}{E}\,\,=\,\,1\] \[w\,\,=\,\,31.75\,g\]


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