Q68 / 180 · AIIMS 2013 · Chemistry

Assertion : $\mathrm{Cu}$ is stronger reducing agent than $\mathrm{H}_2$. Reason : $E^{\circ}$ of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ is negative.

  • 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.
  • Correct answer
    D
    If both assertion and reason are false.

Solution

$E^{\circ}$ of $\mathrm{Cu}^{2+} / \mathrm{Cu}$ is $+0.34 \mathrm{~V}$ and positive $E^{\circ}$ means that the redox couple is a weaker reducing agent than the $\mathrm{H}^{+} / \mathrm{H}_2$ couple.

Hence, the correct answer is option: 'D'.

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