MPSC Rajyaseva 2020 GS Paper 1 — Question 67
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रासायनिक घटाचे विद्युतगामक बल धन असते, जेव्हा अभिक्रियेचा मुक्त ऊर्जा बदल हा असतो. The EMF of a chemical cell is positive, when the free energy change of the reaction is .
1)> 0
2)< 0✓ Correct
3)= 0
4)मुक्त ऊर्जा बदल आणि विद्युतगामक बलाचा संबंध नाही / No relationship between the free energy change and EMF
The relationship between cell emf (E) and Gibbs free energy change (delta G) is given by delta G = -nFE. For the EMF to be positive (>0), the free energy change must be negative (<0) for a spontaneous process.