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In dry cell, what acts as a negative electrode?A. ZincB. GraphiteC. Ammonium chlorideD. Manganese dioxide |
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Answer» Correct Answer - A In a dry cell, zinc acts as a negative electrode. In this cell, the outer zinc container is the negatively charged terminal. At anode (negative terminal) `Zn (s)to Zn^(2+) (aq)+ 2e^-` At cathode (positive terminal) `2MnO_2+2e^-+2NH_4Cl(aq)toMn_2O_3(s)+2NH_3(aq)+H_2O(l)+2Cl^-` |
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