Question

Which of the following polymers is prepared by condensation polymerization: Nylon-6,6 or Polythene?

• A. Polythene
• B. Nylon-6,6
• C. Both
• D. None of these

Hint:

If polymer formation releases small molecules like \(H_2O\) or \(HCl\), the reaction is condensation polymerization.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks to identify which polymer is formed via a condensation reaction (which involves the loss of small molecules like water) rather than an addition reaction.
Step 2: Key Formula or Approach:
1. Addition Polymerization: Monomers with double bonds link without loss of atoms (e.g., Alkenes).
2. Condensation Polymerization: Monomers with bifunctional groups react, eliminating small molecules (e.g., Polyesters, Polyamides).
Step 3: Detailed Explanation:
Polythene is made by the addition polymerization of ethene (\( CH_2=CH_2 \)). No molecules are eliminated.
Nylon-6,6 is made from two monomers: Hexamethylenediamine and Adipic acid.
During the reaction, the amine group (\( -NH_2 \)) and the carboxylic acid group (\( -COOH \)) react to form an amide linkage (\( -NH-CO- \)), releasing a water molecule (\( H_2O \)) for every bond formed.
Therefore, Nylon-6,6 is a condensation polymer.
Step 4: Final Answer:
The polymer prepared by condensation is Nylon-6,6.