RE-NEET 2026 Chemistry Solubility Product MCQ Question

The correct order of solubility of the given salts in water at 298 K is based on their solubility product constants (Ksp). Zinc hydroxide ($\text{Zn(OH)}_2$) is only slightly soluble, while silver bromide ($\text{AgBr}$) is less soluble than zinc hydroxide, and mercurous chloride ($\text{Hg}_2\text{Cl}_2$) is the least soluble among them. Therefore, the order is $\text{Zn(OH)}_2 > \text{AgBr} > \text{Hg}_2\text{Cl}_2$.

The other options fail because they incorrectly rank the solubility of these compounds, either placing $\text{Hg}_2\text{Cl}_2$ or $\text{AgBr}$ higher than they should be based on their Ksp values.