Question

Assertion :${Cu}^{2+}$ is more stable than ${Cu}^{+}$ . Reason: Electrode potential is more important in determining stable oxidation state than electronic configuration.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Half filled and completely filled subshells are more stable.
However $C{u}^{2+}$ with $3d^9$ electronic configuration is more stable than $C{u}^{+}$ with $3d^{10}$ electronic configuration.
This is because electrode potential is more significant in determining stable oxidation state than electronic configuration.
The standard electrode potential for $C{u}^{2+}/Cu$ is lower than the standard electrode potential for $C{u}^{+}/Cu$