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MHT CET Medical202625 April 2026Morning ShiftChemistryElectrochemistryActual

Which of the following acts as a cathode in a dry cell?

Options

  1. AZn + NH ₄ Cl
  2. BZn
  3. CGraphite rod
  4. DNH ₄ Cl + ZnCl ₂

Correct answer

C. Graphite rod

Step-by-step solution

In a dry cell (Leclanché cell), the anode is a zinc container. The cathode is a graphite (carbon) rod surrounded by powdered manganese dioxide ( MnO ₂ ) and carbon. The space between the electrodes is filled with a moist paste of ammonium chloride ( NH ₄ Cl ) and zinc chloride ( ZnCl ₂ ). Therefore, the graphite rod acts as the cathode. Answer: Graphite rod

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