If a steady current of $4 \, A$ is maintained for $40 \, min$,depositing $4.5 \, g$ of zinc at the cathode,then the electrochemical equivalent $(Z)$ will be:
- A$51 \times 10^{-7} \, g/C$
- B$28 \times 10^{-6} \, g/C$
- C$32 \times 10^{-5} \, g/C$
- D$47 \times 10^{-5} \, g/C$
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