Question

Match List - I with List - II.

List - I (Microscopic Appearance)	List - II (Fiber)
A. Convolutions	I. Wool
B. Smooth	II. Silk
C. Scales and crimp	III. Cotton
D. Smooth and crimped	IV. Rayon

Choose the correct answer from the options given below :

• A. \( \text{A-III, B-II, C-I, D-IV} \)
• B. \( \text{A-IV, B-II, C-I, D-III} \)
• C. \( \text{A-III, B-IV, C-I, D-II} \)
• D. \( \text{A-I, B-IV, C-II, D-III} \)

Hint:

If you see "Scales," it is always Wool. If you see "Convolutions" or "Twisted Ribbon," it is always Cotton. These two are the most common diagnostic features in fiber science.

Answer 1

The Correct Option is A

Concept: Microscopic analysis is a primary method for fiber identification. Each textile fiber possesses unique longitudinal and cross-sectional characteristics under a microscope.

Step 1: Match characteristics to the respective fibers.

• Cotton (A): Under a microscope, cotton looks like a twisted ribbon. These twists are technically called convolutions (A-III).
• Silk (B): Silk is a natural filament. Cultivated silk is characterized by a very smooth, transparent, rod-like appearance (B-II).
• Wool (C): Wool fibers have a very distinct surface made of overlapping scales (cuticle) and a natural wave-like "bend" called crimp (C-I).
• Rayon (D): Regenerated fibers like viscose rayon are manufactured filaments that are smooth but often have lengthwise striations. When processed, they can be given a "crimped" effect to mimic wool (D-IV).