Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cu 2+ in water is more stable than Cu +. Reason (R): Enthalpy of hydration for Cu 2+ is much less than that of Cu +. In the light of the above statements, choose the correct answer from the options given below :

Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cu 2+ in water is more stable than Cu +. Reason (R): Enthalpy of hydration for Cu 2+ is much less than that of Cu +. In the light of the above statements, choose the correct answer from the options given below : (A) Both (A) and (R) are correct and (R) is the correct explanation of (A) (B) (A) is correct but (R) is not correct (C) Both (A) and (R) are correct but (R) is not the correct explanation of ( A ) (D) (A) is not correct but (R) is correct

Tardigrade Admin · Accepted Answer

2 Cu + arrow Cu 2++ Cu The stability of Cu 2+( aq ) rather than Cu +( aq ), is due to the much more negative Δ text hyd H of Cu 2+ (aq) than Cu +( aq ), which more than compensates for the second ionisation enthalpy of Cu.

Both (A) and (R) are correct and (R) is the correct explanation of (A)

(A) is correct but (R) is not correct

Both (A) and (R) are correct but (R) is not the correct explanation of $(A)$

(A) is not correct but (R) is correct

$2 C u^{+} \to C u^{2 +} + C u$
The stability of $C u^{2 +} (a q)$ rather than $C u^{+} (a q)$ , is due to the much more negative $Δ_{hyd} H$ of $C u^{2 +}$ (aq) than $C u^{+} (a q)$ , which more than compensates for the second ionisation enthalpy of $C u$ .

Both (A) and (R) are correct and (R) is the correct explanation of (A)

(A) is correct but (R) is not correct

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is not correct but (R) is correct

2Cu+→Cu2++Cu The stability of Cu2+(aq) rather than Cu+(aq), is due to the much more negative Δhyd ​H of Cu2+ (aq) than Cu+(aq), which more than compensates for the second ionisation enthalpy of Cu.

Both (A) and (R) are correct but (R) is not the correct explanation of $(A)$

$2 C u^{+} \to C u^{2 +} + C u$
The stability of $C u^{2 +} (a q)$ rather than $C u^{+} (a q)$ , is due to the much more negative $Δ_{hyd} H$ of $C u^{2 +}$ (aq) than $C u^{+} (a q)$ , which more than compensates for the second ionisation enthalpy of $C u$ .