An aqueous solution of a salt A gives a white crystalline precipitate B with NaCl solutions. The filtrate gave a black ppt. C when H_2 S gas is passed in it. Compound B dissolves in hot water and the solution gives a yellow precipitate D on treatment with Nal and cooling. The compound A does not give any gas with dilute HCI but liberates a reddish brown gas on heating. Identify the compounds A.

An aqueous solution of a salt A gives a white crystalline precipitate

1.	An aqueous solution of a salt A gives a white crystalline precipitate B with NaCl solutions. The filtrate gave a black ppt. C when H_2 S gas is passed in it. Compound B dissolves in hot water and the solution gives a yellow precipitate D on treatment with Nal and cooling. The compound A does not give any gas with dilute HCI but liberates a reddish brown gas on heating. Identify the compounds A.
Answer» PB S `Pb (NO_(3))_(2)` `AgNO_(3)` `AGS` Solution :`A : Pb (NO_(3))_(2) , B : PbCl_(2) , C : PbS , D : PbI_2`