\( 1 \) litre of \( 1 \mathrm{M} \mathrm{CuSO}_{4} \) solution is electrolyzed. After passing \(...

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\( 1 \) litre of \( 1 \mathrm{M} \mathrm{CuSO}_{4} \) solution is electrolyzed. After passing \( 2 \mathrm{~F} \) charge, the molarity of \( \mathrm{CuSO}_{4} \) will be:
(A) \( \mathrm{M} / 2 \)
(B) \( \mathrm{M} / 4 \)
(C) \( \mathrm{M} \)
(D) Zero
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