Which of the following reagents is commonly used to detect the presence of sulfide ions?

Nessler's reagent is used to detect

$A$ mixture of two salts is not water-soluble but dissolves completely in dilute hydrochloric acid to form a colourless solution. The mixture could be

Among $Fe^{3+}$,$Pb^{2+}$,$Cu^{2+}$,and $Mn^{2+}$,identify the one that gets precipitated out while passing $H_2S$ gas in the presence of $NH_4OH$ as a group reagent. The highest possible oxidation state of the corresponding metal is:

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 of the following can be used instead of $NH_4Cl$ in the analysis of group $III$ radicals?