Q. Which one of the following sets forms the biodegradable polymer?
A) CH₂=CH–CN and CH₂=CH–CH=CH₂
B) H₂N–CH₂–COOH and H₂N–(CH₂)₅–COOH
C) HO–CH₂–CH₂–OH and HOOC–C₆H₄–COOH (terephthalic acid)
D) C₆H₅–CH=CH₂ and CH₂=CH–CH=CH₂
Explanation
[Solution from source] Glycine (H₂N–CH₂–COOH) and 6-aminohexanoic acid (H₂N–(CH₂)₅–COOH) condense to form nylon-2-nylon-6, a biodegradable polyamide. Ethylene glycol with terephthalic acid gives non-biodegradable polyester (Dacron/PET), and the other pairs give synthetic rubbers. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.