Thank you for reporting, we will resolve it shortly
Q.
Assertion : Copper$(II)$ iodide is not known. Reason : $Cu^{2+}$ oxidises $I^-$ to $I_2$.
The d-and f-Block Elements
Solution:
$Cu ^{+2}$ is more stable than $Cu ^{+}$(due to high hydration enthalpy), in case of iodine, $Cu ^{+2}$ oxidizes $I ^{-}$to $I _{2}$.Hence Copper(II) iodide is not known.