Question

An aqueous solution of a salt Compound C is:
A) gives a white precipitate
B) with sodium chloride solution The filtrate gives a black precipitate
C) when H₂S is passed into it Compound (B) dissolves in hot water and the solution gives a yellow precipitate
D) on treatment with sodium iodide The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating Identify the compounds (A) to (D)

1.    
2. PbCl₂    
3. PbS    
4. PbI₂