\( \mathrm{Zn}- \) Cu couple used as reducing agent is: (A) mixture of \( \mathrm{Zn} \) and \( ...
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0\( \mathrm{Zn}- \) Cu couple used as reducing agent is:
(A) mixture of \( \mathrm{Zn} \) and \( \mathrm{Cu} \) powder
(B) copper deposited on granulated zinc
(C) Zn deposited on copper fillings
(D) a rod half made of copper and half made of zinc
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