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JEE Main levelSingle correct optionDifficulty 2 of 3ec033

The spontaneous reaction is to be run in a galvanic cell. The correct cell notation is

  1. A
  2. B
  3. C
  4. D

Answer: A

Zn is oxidised, so is the anode and is written on the left. The cathode half reaction has both species in solution, so an inert Pt electrode is needed and the two ions are separated by a comma, not a vertical line. Option B has no electrode, option C is reversed (would have negative EMF), option D reduces to Fe, which is a different reaction.
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