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

💡 Solution & Explanation

When an insufficient amount of AgNO₃ is added to an excess of KI, the resulting AgI particles preferentially adsorb the excess I⁻ ions from the solution, acquiring a negative charge. During electrophoresis, these negatively charged particles migrate towards the positively charged anode. Statement II correctly outlines the principle of preferential adsorption that gives them this charge. Therefore, correct answer is A.