Assertion (A): Micelles are formed by surfactant molecules above the critical micellization concentration `(CMC)` .
Reason(R): The conductivity of a solution having surfactant molecules decreases sharply at the `CMC` .

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

B

Explanation

The formation micellies takes place above `CMC`. Hence assertion is true. Each nicelle contains at least 100 molecules. Hence, conductivity of the solution decreases sharply at the `CMC`. Hence reason is also true but it is not the correct explanation of assertion.