(B) The stability of $Cu^{2+}(aq)$ ions is primarily due to their very high hydration enthalpy,which more than compensates for the energy required to

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The high hydration enthalpy of $Cu^{2+}(aq)$ compensates for the second ionization enthalpy of Copper.

(B) The stability of $Cu^{2+}(aq)$ ions is primarily due to their very high hydration enthalpy,which more than compensates for the energy required to remove the second electron from the $Cu^+(g)$ ion. Therefore,$Cu^{2+}$ is more stable than $Cu^+$ in aqueous solutions. The correct option is $B$.

Class 12 Chemistry The d- and f-Block Elements General Characteristics

Easy

Copper exhibits only $+2$ oxidation state in its stable compounds. Why?

GUJCET 2011 All GUJCET

A
Copper is a transition metal in the $+2$ state.
B
The high hydration enthalpy of $Cu^{2+}(aq)$ compensates for the second ionization enthalpy of Copper.
C
The electron configuration of Copper in the $+2$ state is $[Ar] 3d^9 4s^0$.
D
Copper forms coloured compounds in the $+2$ state.