Question

Which of the following monomers form biodegradable polymers ?

• A. Ethylene glycol and pthalic acid
• B. Caprolactum and 1,3- Butadiene
• C. Phenol and formaldehyde
• D. 3-hydroxybutanoic acid and 3-hydroxypentanoic acid

Answer 1

The Correct Option is D

• Option A: Phenol and formaldehyde

Forms phenolic resins, which are not biodegradable. These are synthetic materials that do not degrade easily in nature.

• Option B: 3-hydroxybutanoic acid and 3-hydroxypentanoic acid

Correct. These monomers form polyhydroxyalkanoates (PHAs), which are biodegradable polymers. PHAs are produced by bacteria and can decompose naturally in the environment.

• Option C: Ethylene glycol and phthalic acid

Forms polyethylene terephthalate (PET), which is not biodegradable. PET is commonly used for bottles and fibers but is resistant to biodegradation.

• Option D: Caprolactam and 1,3-Butadiene

Forms nylon 6 and synthetic rubber, which are both not biodegradable. These materials do not easily break down in the environment.

Conclusion:

The correct answer is Option B: 3-hydroxybutanoic acid and 3-hydroxypentanoic acid, as they form biodegradable polymers such as polyhydroxyalkanoates (PHAs).