The Sulphide which is insoluble in dilute hydrochloric acid is?

A. FeS
B. CuS
C. ZnS
D. Na2S

Correct Answer:

Option B – CuS

Explanation

Sulphides like PbS (lead (II) sulphide) and CuS (copper (II) sulphide) are insoluble in acidified solutions.