Cadmium amalgam is prepared by electrolysis of a sodium of `CdCl_2` using a mercury cathode. How long should a current of 4 A be passed in order to prepare 10% by mass Cd in Cd-Hg amalgam on cathode of 4.5 g Hg? (atomic mass of Cd=112)
A
400sec
B
215.40 sec
C
861.6 sec
D
4308.8 sec
Text Solution
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The correct Answer is:
D
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