Chemistry-(general)
NEET Chemistry (general) Assertion Reason Question
Type: Assertion Reason-assertion-Medium-Class 12
Assertion (A): Copper has a positive standard electrode potential (E°) which accounts for its inability to liberate hydrogen from acids. | Reason (R): The high energy needed to transform copper from solid to Cu²⁺ in solution is not balanced by its hydration enthalpy.
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 copper's positive E° value prevents it from liberating H₂ from acids, and this is due to the high energy required to transform Cu(s) to Cu²⁺(aq) not being balanced by its hydration enthalpy.
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