Question

Assertion (A): Wool has a unique property to produce felt fabrics directly from wool fibres.
Reason (R): Wool is hygroscopic in nature and has a standard moisture regain of 13.6-16 percent. Choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

To distinguish between Assertion-Reason links: Ask "Does X happen *because* of Y?" Wool felts because of its Scales, not just because it absorbs water.

Answer 1

The Correct Option is B

Concept: Wool fibers possess a unique physical structure characterized by overlapping surface scales and a natural crimp. These properties, combined with its moisture-related characteristics, define its performance in textile manufacturing.

Step 1: Evaluating the Assertion (A): Wool is indeed the only natural fiber capable of true felting. This occurs because the microscopic scales on the fiber surface interlock when subjected to heat, moisture, and mechanical agitation (friction). Assertion (A) is correct.

Step 2: Evaluating the Reason (R): Wool is highly hygroscopic, meaning it readily absorbs moisture from the air. Its standard moisture regain is internationally recognized in the range of 13.6% to 16%. Reason (R) is correct.

Step 3: Determining the relationship: While both statements are factually true, the reason for wool's ability to felt is its surface scales and crimp, not primarily its moisture regain percentage. Moisture regain helps the process, but it is not the fundamental *cause* of felting.

Step 4: Conclusion: Both statements are correct, but the reason does not explain the assertion. Thus, option (2) is correct.