Q24 / 160 · AP EAMCET 2023 (17 May Shift 2) · Chemistry

The electrolyte used in mercury cell is

  • A
    Moist paste of $\mathrm{NH}_4 \mathrm{Cl}$ and $\mathrm{ZnCl}_2$
  • B
    $38 \%$ solution of $\mathrm{H}_2 \mathrm{SO}_4$
  • Correct answer
    C
    Paste of $\mathrm{KOH}$ and $\mathrm{ZnO}$
  • D
    Paste of $\mathrm{MgCl}_2$ and $\mathrm{HgO}$

Solution

Mercury cell uses a paste of $\mathrm{KOH}$ and $\mathrm{ZnO}$. Anode $=\mathrm{Zn}-\mathrm{Hg}$ amalgam Cathode $=\mathrm{HgO}+\mathrm{C}$ paste.

Hence, the correct answer is option: 'C'.

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