Question

Assertion (A): Cu cannot liberate \( H_2 \) on reaction with dilute mineral acids. Reason (R): Cu has positive electrode potential.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

Metals like copper, with a positive electrode potential, are less reactive and do not readily release hydrogen when reacting with dilute acids.

Answer 1

The Correct Option is D

Copper does not release hydrogen gas with dilute mineral acids due to its lower reactivity, preventing it from displacing hydrogen. While copper's positive electrode potential indicates a reduced tendency to lose electrons, this property does not directly account for its inability to liberate hydrogen.
Step 2: Therefore, Assertion (A) is false, and Reason (R) is true; however, they lack a logical connection.