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

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

Which of the following compounds is not soluble in hot dilute $HNO_3$?

$Al^{3+}$,$Fe^{3+}$,$Zn^{2+}$,and $Ni^{2+}$ ions are present in an acidic solution. Excess of ammonium chloride $(NH_4Cl)$ solution is added followed by the addition of ammonium hydroxide $(NH_4OH)$ solution. The resulting precipitate will contain:

Which reagent is used to distinguish between silver and lead salts?

What precipitate is formed when $SnCl_2$ is added to $HgCl_2$?