Correct Answer: Option C

Explanation

From faraday's law of electrolysis

M = I t Z
0.990 = I x (40 x 60) x 3.3 x 10^-4

\( \implies \frac{0.990}{2400 \times 3.3 \times 10^{-4}} = 1.25A \\
\text{Thus the correction to be made } = 1.25 - 1.20 = 0.05A \)

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