Chemistry Industrial Chemistry PMDC Conceptual Practice
PMDC Verified Question 33 of 41
Which of the following polymers is produced via step-growth condensation polymerization?
A
Polyvinyl chloride
B
Polyamide (Nylon-6,6)
C
Polystyrene
D
Polyethene
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Polyamide (Nylon-6,6)
Concept:

Condensation polymers form step-wise between functional groups (e.g., amine, carboxyl, hydroxyl) with the release of small by-product molecules like water.

Formula / Reaction:

$$\text{Diamine} + \text{Diacid} \longrightarrow \text{Polyamide} + \text{H}_2\text{O}$$

Solution:

  • Polyamides (such as Nylon-6,6 and Nylon-6,10) grow through condensation reactions between amine and carboxylic acid functional groups.


Why other options are incorrect:

  • Polyvinyl chloride (PVC): Chain-growth addition polymer of vinyl chloride.


  • Polystyrene: Chain-growth addition polymer of styrene.


  • Polyethene (PE): Chain-growth addition polymer of ethene.

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