For depositing $1 \ g$ of $Cu$ in a copper voltameter by passing $2 \ A$ of current,the time required will be (For copper $Z = 0.00033 \ g/C$)
- AApprox. $20 \ minutes$
- BApprox. $25 \ minutes$
- CApprox. $30 \ minutes$
- DApprox. $35 \ minutes$
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