Assertion (A) $\mathrm{CuI}_2$ cannot be prepared by the reaction of $\mathrm{Cu}^{2+}(a q)$ with…
Assertion (A) $\mathrm{CuI}_2$ cannot be prepared by the reaction of $\mathrm{Cu}^{2+}(a q)$ with $\mathrm{I}^{-}(a q)$
Reason (R) Aqueous $\mathrm{Cu}^{2+}$ solution is blue in colour
The correct answer is
Both (A) and (R) are correct and (R) is the correct explanation of $(A)$
Both (A) and (R) are correct but (R) is not correct explanation of $(A)$
(A) is correct but (R) is not correct
(A) is not correct but (R) is correct
Solution
The reaction of $\mathrm{Cu}^{2+}$ with $\mathrm{I}^{-}$has negative cell potential thus it is not possible.
Reduction $2 \mathrm{Cu}^{2+}(a q)+2 e^{-} \longrightarrow 2 \mathrm{Cu}^{+}(a q)$;
$E=+0.159$
Oxidation $2 \mathrm{I}^{-} \longrightarrow \mathrm{I}_2+2 e^{-} ; E=-0.535$