We can separate AgCl and PbCl₂ by adding hot water.
Explanation:
In order to separate group one salts/ions is important to consider their solubility.
PbCl₂ is more soluble in water then AgCl and, when we increase water's temperature, PbCl₂ solubility icireases significantly. However, AgCl solubility does not change considerably.
Therefore, when we add hot water to the solution, the PbCl₂ will be dissolved and AgCl will remain as a precipitate.
