Sodium nitroprusside when reacts with a solution of $Na_2S$,produces:

Which of the following is not precipitated as sulphide by passing $H_2S$ in the presence of concentrated $HCl$?

Among $PbS$,$CuS$,$HgS$,$MnS$,$Ag_2S$,$NiS$,$CoS$,$Bi_2S_3$,and $SnS_2$,the total number of black coloured sulphides is

Which of the following compounds can produce Rinmann's green with $Co(NO_3)_2$ solution?

When a salt is treated with sodium hydroxide solution,it gives gas $X$. On passing gas $X$ through reagent $Y$,a brown-coloured precipitate is formed. $X$ and $Y$ respectively,are

Aqueous solution of Mohr's salt gives the test of which ions?