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

💡 Solution & Explanation

When KI is in excess, the formed AgI preferentially adsorbs the common I⁻ ions to become a negatively charged sol ([AgI]I⁻). When AgNO₃ is in excess, AgI adsorbs common Ag⁺ ions, forming a positively charged sol ([AgI]Ag⁺). Statement II correctly explains the preferential adsorption of common ions determining the charge. Therefore, correct answer is A.