Salt Analysis

Concept:Solubility of metal chlorides varies based on the metal ion's size and charge.Group 1 and 2 chlorides are water soluble; AgCl and $\mathrm{Hg}_2\mathrm{Cl}_2$ are sparingly soluble; $\mathrm{PbCl}_2$ is soluble in hot water.Explanation:Identify a chloride that dissolves in water at room temperature (x).Examples: $\mathrm{MgCl}_2$, $\mathrm{AlCl}_3$, $\mathrm{CuCl}_2$ are all water soluble at $25^\circ$C.Identify a chloride that is sparingly soluble at room temperature (y).Examples: $\mathrm{AgCl}$ and $\mathrm{Hg}_2\mathrm{Cl}_2$ have low solubility in cold water.Identify a chloride that dissolves only in hot water (z).Example: $\mathrm{PbCl}_2$ is nearly insoluble in cold water but soluble in hot water.Match these to the given options.Option B has $\mathrm{CuCl}_2$ (x), $\mathrm{AgCl}$ (y), and $\mathrm{PbCl}_2$ (z) — all fit the description.Other options do not match all three conditions.Answer:Option B: $\mathrm{CuCl}_2, \mathrm{AgCl}, \mathrm{PbCl}_2$