Formation of which complex,among the following,is not a confirmatory test of $Pb^{2+}$ ions?

The incorrect statement out of the following is:

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 dilute $NaCl$ solution,and one formed a black precipitate with $H_2S$. The salt could be:

What is the full form of $DMG$?

Which of the following is soluble in yellow ammonium sulphide?

Which of the following ions gives a white precipitate when $HCl$ is added to its aqueous solution?