Read the Assertion and Reason below and choose the correct option. — Chemical Equilibrium Chemistry Question

💡 Solution & Explanation

Passing HCl gas through a saturated NaCl solution increases the concentration of chloride ions (Cl⁻) due to the complete dissociation of HCl. This common ion effect causes the ionic product $[Na^+][Cl^-]$ to exceed the solubility product ($K_{sp}$) of NaCl, forcing the equilibrium $NaCl(s) \rightleftharpoons Na^+(aq) + Cl^-(aq)$ to shift backward, precipitating pure NaCl. Therefore, Statement II is the correct explanation of Statement I. Therefore, correct answer is A.