Question

Three separate samples of a solution of a single salt gave these test results: one formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. NaCl solution and one formed a black precipitate with `H_(2)S` the salt salt could be
A. `AgNO_(3)` solution
B. `Pg(NO_(3))_(2)`
C. `Hg(NO_(3))_(2)`
D. `MnSO_(4)`

Answer 1

Correct Answer - B
`Pb(NO_(3))_(2)+2NH_(4)OH to underset("White ppt.")(Pb(OH)_(2))+2NH_(4)NO_(3)`
`Pb(NO_(3))_(2)+2NaCl to underset("White ppt.")(PbCl_(2))+2NaNO_(3)`
`Pb(NO_(3))_(2)+H_(2)S to underset("black ppt.")(PbS)+2HNO_(3)`