2. Solved Papers
  3. JEE Main & Advanced

JEE Main & Advanced JEE Main Paper (Held On 25 April 2013)

  • question_answer
                    A solution of copper sulphate\[({{\operatorname{CuSO}}_{4}})\]is electrolyzed for 10 minutes with a current of 1.5 ampers. The mass of copper deposited at the cathode (at. Mass of Cu=63u) is:     JEE Main Online Paper ( Held On 25  April 2013 )

    A)                 0.3892g                

    B)                                        0.2938 g

    C)                                        0.2398 g                               

    D)                                        0.3928 g

    Correct Answer: B

    Solution :

    W=Zit where Z = Electrochemical equivalent Eq. wt. of copper \[=\frac{63}{2}=31.5\] \[Z=\frac{31.5}{96500}\] W = Z it\[=\frac{31.5}{96500}\times 1.5\times 10\times 60=0.2938g\]


You need to login to perform this action.
You will be redirected in 3 sec spinner