Question

Assertion : Copper metal gets readily corroded in acidic aqueous solution. 

Reason : Free energy change for this process is negative.

(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 correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

The correct option is (d) A and R are false.

Explanation:

Non-oxidising acids (HCl and dil. H₂SO₄) do not have any effect on copper. However they dissolve the metal in presence of air. As it is a non-spontaneous process so, ΔG cannot be -ve.