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Standard XII
Chemistry
Question

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.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  3. Assertion is correct but Reason is incorrect
  4. Assertion is incorrect but Reason is correct

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Assertion is incorrect but Reason is correct
C
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
D
Assertion is correct but Reason is incorrect
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Solution
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Electrochemical cell can only be setup when the redox reaction is spontaneous, and the spontaneity is explained by ECell of the reaction, if ECell of reaction is +ve, then the value of free energy change is negative
as, ΔG = -nFECell and the reaction is spontaneous;
hence, both assertion and reason are correct.

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