Assertion :An electrochemical cell can be set-up only if the redox reaction is spontaneous. Reason: A reaction is spontaneous if free energy change is negative.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Electrochemical cell can only be setup when the redox reaction is spontaneous, and the spontaneity is explained by $E_{C e l l}$ of the reaction, if $E_{C e l l}$ of reaction is +ve, then the value of free energy change is negative
as, $Δ$ G = -nF $E_{C e l l}$ and the reaction is spontaneous;
hence, both assertion and reason are correct.

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