JEE Main · 2024 · Shift-IeasyEC-024

One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode…

Electrochemistry · Class 12 · JEE Main Previous Year Question

Question

One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode comes?

Options
  1. a

    Oxidation-Reduction electrodes

  2. b

    Metal ion-Metal electrodes

  3. c

    Gas-Ion electrodes

  4. d

    Metal-Insoluble Salt-Anion electrodes

Correct Answerd

Metal-Insoluble Salt-Anion electrodes

Detailed Solution

Strategy: Classify the calomel electrode based on its physical components: a metal, its sparingly soluble salt, and a solution containing the same anion.

Structure of Calomel Electrode: The calomel electrode is represented as \ceHg(l)Hg2Cl2(s)Cl(aq)\ce{Hg(l) | Hg2Cl2(s) | Cl^-(aq)}.

  • Metal: \ceHg\ce{Hg}
  • Insoluble Salt: \ceHg2Cl2\ce{Hg2Cl2} (Calomel)
  • Anion: \ceCl\ce{Cl^-}

This configuration belongs to the Metal-Insoluble Salt-Anion Electrode category, similar to the silver-silver chloride electrode.

Answer: (d) Metal-Insoluble Salt-Anion electrodes\boxed{\text{Answer: (d) Metal-Insoluble Salt-Anion electrodes}}

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