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A hypothetical electrochemical cell is show below stackrelΘ A | A^+(x M) B^+(y M) | stackreloplus B The emf measured is +0.20 ~V. The cell reaction…

NEET UG 2006 — Chemistry Physical Chemistry

2006mcqmedium

A hypothetical electrochemical cell is show below AΘ∣A+(xM)∥B+(yM)∣B⊕\stackrel{\Theta}{\mathrm{A}}\left|\mathrm{A}^{+}(x \mathrm{M}) \| \mathrm{B}^{+}(y \mathrm{M})\right| \stackrel{\oplus}{\mathrm{B}}AΘ​∣A+(xM)∥B+(yM)∣B⊕​ The emf measured is +0.20 V+0.20 \mathrm{~V}+0.20 V. The cell reaction is:

Official previous-year question

Held on 30 Apr 2006 · Verified 9 Jul 2026.

Options

  1. A

    A+B+→A++B\mathrm{A}+\mathrm{B}^{+} \rightarrow \mathrm{A}^{+}+\mathrm{B}A+B+→A++B

  2. B

    A++B→A+B+\mathrm{A}^{+}+\mathrm{B} \rightarrow \mathrm{A}+\mathrm{B}^{+}A++B→A+B+

  3. C

    A++e−→A\mathrm{A}^{+}+e^{-} \rightarrow \mathrm{A}A++e−→A; B++e−→B\mathrm{B}^{+}+e^{-} \rightarrow \mathrm{B}B++e−→B

  4. D

    the cell reaction cannot be predicted

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