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In the following question, A statement o...

In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
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 concentration of detergents becomes equal to CMC.

A

Both A and Rare true and R is the correct explanation of A

B

Both A and R are true but explanation of A

C

A is true but R is false

D

A is false and R is True

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the Assertion (A) and Reason (R), we need to analyze both statements carefully. ### Step 1: Understand the Assertion (A) - **Assertion (A)** states that "Detergents with low CMC are more economical to use." - **Explanation**: CMC stands for Critical Micelle Concentration. It is the concentration of detergent at which micelles start to form. A detergent with a low CMC means that it requires a smaller amount of detergent to reach the concentration needed for micelle formation. This makes it more economical because less detergent is needed for effective cleaning. ### Step 2: Understand the Reason (R) - **Reason (R)** states that "Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC." - **Explanation**: This statement is true. The cleansing action of detergents indeed relies on the formation of micelles, which occurs when the concentration of the detergent reaches the CMC. Micelles trap dirt and grease, allowing them to be washed away. ### Step 3: Analyze the Relationship Between A and R - Both the assertion and reason are true statements. - The reason correctly explains why detergents with low CMC are more economical: because they form micelles at lower concentrations, thus requiring less detergent for effective cleaning. ### Conclusion Since both the assertion and reason are true, and the reason provides a correct explanation for the assertion, the correct choice is: **Both A and R are true, and R is the correct explanation of A.**
To solve the question regarding the Assertion (A) and Reason (R), we need to analyze both statements carefully. ### Step 1: Understand the Assertion (A) - **Assertion (A)** states that "Detergents with low CMC are more economical to use." - **Explanation**: CMC stands for Critical Micelle Concentration. It is the concentration of detergent at which micelles start to form. A detergent with a low CMC means that it requires a smaller amount of detergent to reach the concentration needed for micelle formation. This makes it more economical because less detergent is needed for effective cleaning. ### Step 2: Understand the Reason (R) - **Reason (R)** states that "Cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC." ...
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