NEETChemistryElectrochemistry
Assertion (A) CuI ₂ cannot be prepared by the reaction of Cu ²⁺(a q) with I ⁻(a q) Reason (R) Aqueous Cu ²⁺ solution is blue in colour The correct answer is
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (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
Correct answer
B. Both (A) and (R) are correct but (R) is not correct explanation of (A)
Step-by-step solution
The reaction of Cu ²⁺ with I ⁻ has negative cell potential thus it is not possible. Reduction 2 Cu ²⁺(a q)+2 e⁻ 2 Cu ⁺(a q) ; E=+0.159 Oxidation 2 I ⁻ I ₂+2 e⁻ ; E=-0.535