Statement - I :Cu⁺²(aq) is more stable than Cu+(aq)
Statement - II :Heat of hydration of Cu⁺² is more than IP₂ of Cu

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Both statements I and II are correct

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

Statement-I is correct and statement-II is incorrect

answer is A.

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Detailed Solution

Half filled and completely filled subshells are more stable.
However Cu²⁺ with 3d⁹ electronic configuration is more stable than Cu⁺ with 3d¹⁰ electronic configuration.
This is because electrode potential is more significant in determining stable oxidation state than electronic configuration.
The standard electrode potential for Cu²⁺/Cu is lower than the standard electrode potential for Cu⁺/Cu