AP EAMCET · Chemistry · Electrochemistry

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

A Both (A) and (R) are correct and (R) is the correct explanation of \((A)\)
B Both (A) and (R) are correct but (R) is not correct explanation of \((A)\)
C (A) is correct but (R) is not correct
D (A) is not correct but (R) is correct

Verified Solution

Answer & Solution

Correct Answer

(B) Both (A) and (R) are correct but (R) is not correct explanation of \((A)\)

Step-by-step Solution

Detailed explanation

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…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From AP EAMCET

Explore more questions on app

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 colourThe correct answer is

Step-by-step Solution

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