Assertion: A reaction is spontaneous if Ecell = +ve. Reason: For Ecell = +ve, ΔG is always -ve.

Question

Assertion: A reaction is spontaneous if Ecell = +ve. Reason: For Ecell = +ve, ΔG is always -ve. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

For a redox reaction to be spontaneous, the EMF of the cell must be positive. As, -Δ G=n F E text cell Therefore, for E text cell = +ve, Δ G is always negative.

Q. Assertion: A reaction is spontaneous if $E_{ce ll}$ = +ve.
Reason: For $E_{ce ll}$ = +ve, $Δ$ G is always -ve.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

For a redox reaction to be spontaneous, the EMF of the cell must be positive.

As, $- Δ G = n F E_{cell}$

Therefore, for $E_{cell} =$ +ve, $Δ G$ is always negative.

Q. Assertion: A reaction is spontaneous if Ecell​ = +ve. Reason: For Ecell​ = +ve, ΔG is always -ve.