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

💡 Solution & Explanation

Micelles are associated colloids that form only when the concentration of the surfactant exceeds the Critical Micelle Concentration (CMC). Above this point, individual ions aggregate into large clusters (micelles). Since many free charge-carrying ions combine into fewer large units, the molar conductivity of the solution drops sharply. Both statements are factually correct, but the decrease in conductivity is an observed consequence of micelle formation, not its fundamental cause. Therefore, correct answer is B.