Chemistry - Redox Reactions Question with Solution | TestHub

${\mathrm{Cu}}^{+}$has ${\mathrm{d}}^{10}$ configuration

${\mathrm{Cu}}^{2+}$ has ${\mathrm{d}}^{10}$ configuration

hydration energy of ${\mathrm{Cu}}^{+2}$ is higher than that of ${\mathrm{Cu}}^{+}$which compensates second ionisation energy of Cu.

Size of ${\mathrm{Cu}}^{+}<{\mathrm{Cu}}^{+2}$