Assertion (A) Detergents with low CMC are more economical to use.
Reason (R) Cleansing action of detergents involves the formation of micelles. These are formed when the cocentration of detergents becomes equal to CMC.

Options

A. Assertion and reason both are correct and the reason is correct explanation of assertion.
B. Assertion and reason both are correct but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect.
D. Assertion is incorrect, but reason is correct.

Answer

A

Explanation

Detergents with low CMC are more economic to use as cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergent becomes equal to CMC. If CMC has lower value then it will form CMC easily and readily.