Which of the following reagents is used to detect the presence of $Fe^{3+}$ ions in a solution?

In the wet tests for identification of various cations by precipitation,which transition element cation does not belong to group $IV$ in qualitative inorganic analysis?

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

When $H_2S$ is passed through a mixture containing $Cu^{2+}$,$Ni^{2+}$,and $Zn^{2+}$ in an acidic solution,which ion will precipitate?

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

During the qualitative analysis of a salt with cation $y^{2+}$,the addition of a reagent $(X)$ to an alkaline solution of the salt gives a bright red precipitate. The reagent $(X)$ and the cation $(y^{2+})$ present are respectively .... .