Question

What are the monomers used in preparation of PHBV?

• A. \(\mathrm{HOOC}-(\mathrm{CH}_{2})_{4}-\mathrm{COOH}\) and \(\mathrm{H}_{2}\text{ }\mathrm{N}-(\mathrm{CH}_{2})_{6}-\mathrm{NH}_{2}\)

• B.

  

• C.

  

• D. \(\mathrm{C}_{6}\mathrm{H}_{5}\mathrm{OH}\text{ and }\mathrm{CH}_{2}\mathrm{O}\)

Hint:

PHBV is a copolymer of two hydroxy acids; compare the structures in the options.

Answer 1

The Correct Option is C

Step 1: Identify the other polymers
Nylon 6,6, terylene and Bakelite come from the monomers in options (A), (B) and (D).

Step 2: Look for hydroxy acids
PHBV is a polyester made from hydroxy acids, so the monomers must contain both -OH and -COOH.

Step 3: Conclusion
Option (C) shows 3-hydroxybutanoic acid (methyl side chain) and 3-hydroxypentanoic acid (ethyl side chain).

Final Answer:
Option (C) gives the monomers of PHBV. \[ \boxed{\text{(C) }\text{3-hydroxybutanoic acid and 3-hydroxypentanoic acid}} \]