Question

Assertion (A) – Copper is unique in 3d series having a stable +1 oxidation state.

Reason (R) – Copper is prone to disproportionate to the +2 and 0 oxidation states. 

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A). 

(b) Both (A) and (R) are correct and (R) explains (A). 

(c) (A) is correct but (R) is wrong. 

(d) (A) is wrong but (R) is correct.

Answer 1

(b) Both (A) and (R) are correct and (R) explains (A).