Question

With this type of polymerization in fibers the monomers add or join end to end and liberate by-product/s.

• A. Addition Polymerization
• B. Condensation Polymerization
• C. Subtraction Polymerization
• D. Reduction Polymerization

Hint:

Condensation polymerization = Polymer + By-product. Always link this with Nylon and Polyester fibers.

Answer 1

The Correct Option is B

Step 1: Recall the main types of polymerization.
There are mainly two recognized types of polymerization: Addition and Condensation.
In addition polymerization, monomers add one after another without eliminating by-products.
In condensation polymerization, monomers join and eliminate small molecules like water, HCl, or alcohol.
Step 2: Focus on fiber formation.
Most synthetic fibers such as Nylon-6,6 and Polyester (Terylene) are prepared by condensation polymerization.
For example: Nylon-6,6 is formed when hexamethylene diamine reacts with adipic acid, and water is liberated as a by-product.
Similarly, Terylene (a polyester) is produced from terephthalic acid and ethylene glycol with the elimination of water.
Step 3: Analyze each option.
- (A) Addition Polymerization: In this, no by-products are formed, so it does not match the question.
- (B) Condensation Polymerization: Correct. This process liberates by-products like water or HCl during polymer formation.
- (C) Subtraction Polymerization: Not a recognized type of polymerization.
- (D) Reduction Polymerization: Incorrect, not related to polymer formation in this context.
Step 4: Conclusion.
Hence, the polymerization in which fibers are formed by joining monomers with the elimination of by-products is Condensation Polymerization.