Which of the following sulfides is completely precipitated upon dilution of its acidic solution?

Passing $H_2S$ gas into a mixture of $Mn^{2+}$,$Ni^{2+}$,$Cu^{2+}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates

If $Pb^{2+}, Cu^{2+}, Al^{3+}, Cd^{2+}, Zn^{2+}$ radicals are present in an aqueous solution,and it reacts with $H^{+}/H_2S$,a precipitate is produced. The solution $(X)$ obtained after the removal of the precipitate is treated with excess $NaOH$. What is the result?

When $H_2S$ gas is passed through a solution,it reacts to form a white precipitate. Which ion is present in the solution?

The reagents $NH_4Cl$ and aqueous $NH_3$ will precipitate which of the following ions?

Which ion will not be precipitated by aqueous $(NH_4)_2S$?