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 ${Cu}^{+}$ .

Question

In the light of the above statements, choose the correct answer from the options given below :

TestHub · Accepted Answer

2 Cu + → Cu 2 + + Cu The stability of Cu 2 + ( aq ) rather than Cu + ( aq ) , is due to the much more negative ∆ hyd H of Cu 2 + ( aq ) than Cu + ( aq ) , which more than compensates for the second ionisation enthalpy of Cu . Hence, both (A) and (R) are correct and (R) is the correct explanation of (A).

Chemistry - Complete d-block Question with Solution | TestHub

Options:

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