Assertion (A): A is very dilute acidic solution of `Cd^(2+)` and `Ni^(2+)` gives yellow precipitate of `CdS` on passing hydrogen sulphide.
Reason (R) : Solubility product of `CdS` is more than that of `NiS`.

Options

A. If both (A) and (R) are correc, and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If (A) is incorrect, but (R) is correct.

Answer

C

Explanation

(A) is true. (R) is false: Correct reason: `K_(sp)` of `CdS lt K_(sp) NiS`. Since compound with lower `K_(sp)` is precipitated first.