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NEETChemistryElectrochemistry

Any redox reaction would occur spontaneously, if : (a) the free energy change (( G) ) is negative. (b) the ( G ^ ) is positive. (c) the cell EMF is negative. (d) the cell EMF is positive.

Options

  1. Aa, b are correct.
  2. Bb, c, d are correct.
  3. Ca, d are correct.
  4. D( a , b ) & c are correct.

Correct answer

C. a, d are correct.

Step-by-step solution

For a spontaneous redox reaction: (a) The free energy change ( ( G )) must be negative. This indicates that the reaction is thermodynamically favorable. ( G 0 (spontaneous) The other options are incorrect: (b) ( G ^ ) (standard free energy change) being positive indicates a non-spontaneous reaction. (c) A negative cell EMF indicates that the reaction is non-spontaneous. Note: ( G ^ =-n FE ^ ), where ( E ^ ) is the standard cell potential. A positive ( E ^ ) corresponds to a negative ( G^ ).

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