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  9. Q63

MPSC State Service 2020 · GS · Question 63 of 97

The EMF of a chemical cell is positive, when the free energy change of the reaction is ________.

Chemistry

  1. A> 0
  2. B< 0Correct
  3. C= 0
  4. DNo relationship between the free energy change and EMF

Answer: B. < 0

Explanation

EMF is positive when the Gibbs free energy change is negative (spontaneous reaction): delta-G < 0.

Source: MPSC Rajyaseva Prelims 2020 – GS Paper I (Set D), official paper

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