Chemistry-Transition Elements
NEET Chemistry Transition Elements Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): Cu+ ions are unstable in aqueous solution and undergo disproportionation. | Reason (R): The standard electrode potential for Cu2+/Cu is more positive than for Cu+/Cu.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
The NCERT context states that Cu+ ions are unstable in aqueous solution, undergoing disproportionation, and this is due to the more negative ΔhydH⁰ of Cu2+ compared to Cu+, which relates directly to the standard electrode potential.
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