MCQ
$HgCl_2$ is a covalent compound, sparingly soluble in water, the solubility increases by the addition of chloride ions due to
- Acommon ion effect
- ✓formation of complex $[HgCl_4]^{2-}$
- Cweakening of $Hg-Cl$ bonds
- Dstrong ion-dipole forces
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