When excess of AgNO₃ is treated with KI solution, AgI forms — Surface Chemistry Chemistry Question

💡 Solution & Explanation

When KI solution is added to an excess of AgNO₃ solution, the precipitated AgI preferentially adsorbs the common Ag⁺ ions from the dispersion medium, forming a positively charged sol [AgI]Ag⁺. Therefore, correct answer is A.