Metal gives two chlorides, a and b. Compound a gives a black precipitate with NHâ‚„OH, while compound b gives a white precipitate. Upon reaction with KI, compound b yields a red precipitate soluble in excess of KI. The compounds a and b are respectively:
a) AgCl and ZnClâ‚‚
b) PbClâ‚‚ and AgCl
c) ZnClâ‚‚ and PbClâ‚‚
d) AgCl and PbClâ‚‚
