A current of \( 0.1 \mathrm{~A} \) was passed for \( 2 \mathrm{hr} \) through a solution of cupr...

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A current of \( 0.1 \mathrm{~A} \) was passed for \( 2 \mathrm{hr} \) through a solution of cuprocyanide and \( 0.3745 \mathrm{~g} \) of copper was deposited on the cathode. Calculate the current efficiency for the copper deposition. (Atomic mass of \( \mathrm{Cu}=63.5 \) )
(a) \( 79 \% \)
(b) \( 39.5 \% \)
(c) \( 63.25 \% \)
(d) \( 63.5 \% \)
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