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A 250 mL sample of 0.20MCr^(3+) is elect...

A 250 mL sample of `0.20MCr^(3+)` is electrolysed with a current of 96.5 A. If the remaining concentration of `Cr^(3+)` ions is 0.1 M, the duration of electrolysis is (Atomic mass of Cr=52)

A

25sec

B

150sec

C

225sec

D

75sec

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