Question:

Which one of the following monomers form biodegradable polymer?

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PHBV is the most common example of biodegradable polymer in exams.
Updated On: May 8, 2026
  • Urea and formaldehyde
  • Ethylene glycol and terephthalic acid
  • 3-hydroxybutanoic acid and 3-hydroxypentanoic acid
  • Phenol and caproic acid
  • Adipic acid and hexamethylenediamine
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The Correct Option is C

Solution and Explanation

Concept: Biodegradable polymers are polymers that can be broken down by microorganisms into simpler substances like \(CO_2\), water, etc.

Step 1: Identify biodegradable polymer type.
A well-known biodegradable polymer is: \[ \text{PHBV (Poly-}\beta\text{-hydroxybutyrate-co-}\beta\text{-hydroxyvalerate)} \]

Step 2: Monomers of PHBV.

• 3-hydroxybutanoic acid
• 3-hydroxypentanoic acid

Step 3: Check options.

• (A) Urea-formaldehyde → thermosetting → non-biodegradable
• (B) Ethylene glycol + terephthalic acid → PET → non-biodegradable
• (C) Given monomers → form PHBV → biodegradable ✓
• (D) Phenol-based → not biodegradable
• (E) Nylon-6,6 → non-biodegradable Final Conclusion: \[ \boxed{\text{Option (C) forms biodegradable polymer}} \]
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