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The reactions that occurs at the cathode of a common dry cell is

Options

  1. A2 Z n O 2 + M n 2 + + 2 e - → M n Z n 2 O 4
  2. BM n → M n 2 + + 2 e -
  3. C2 M n O 2 + Z n 2 + + 2 e - → Z n M n 2 O 4
  4. DZ n → Z n 2 + + 2 e -

Correct answer

C. 2 M n O 2 + Z n 2 + + 2 e - → Z n M n 2 O 4

Step-by-step solution

In common dry cell. Anode: Z n → Z n + + + 2 e - Cathode: 2 M n O 2 + Z n + + + 2 e - → Z n M n 2 O 4 .

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