MHT CET202016 Oct 2020Evening ShiftChemistryElectrochemistryActual

A solution of CuSO ₄ is electrolysed using a current of 1 5 amperes for 10 minutes. What mass of Cu is deposited at cathode ? (At. mass of Cu =63 7 )

Options

A0.395g
B0.150g
C0.637g
D0.297g

Correct answer

D. 0.297g

Step-by-step solution

(D) The half reaction at cathode is Cu _ (aq) ²⁺+2 e ⁻⁻ Cu _ ( s ) Mole ratio = 1 2 , t =10 ~min =600 ~s Mass of Cu deposited = I t 96500 mole ratio molar mass of Cu = 1.5 600 96500 1 2 63.7=0.297 ~g

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