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Electrochemistry question

2006 · Q99
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Electrochemistry question

2006 · Q99

NEETChemistryElectrochemistryMCQ+4 / −1
A hypothetical electrochemical cell is shown below.

A∣A+(xM)∣∣B+(yM)∣BA\left| {{A^ + }\left( {xM} \right)} \right|\left| {{B^ + }\left( {yM} \right)} \right|BA​A+(xM)​​B+(yM)​B

The emf measured is + 0.20 V. The cell reaction is
  1. A
    A + B+ →\to→ A+ + B
  2. B
    A+ + B →\to→ A + B+
  3. C
    A+ + e−-− →\to→ A;  B+ + e−-− →\to→ B
  4. D
    the cell reaction cannot be predicted.
View written solutionFree

Correct answer: A

From the given expression:

At anode : A →\to→ A+

  • e–

    At cathode : B+
  • e– →\to→ B

    Overall reaction is : A + B+ →\to→ A+
  • B
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