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Incorrect statement about PHBV is

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It is co-polymer of 3- hydroxybutanoic acid and 3 - hydroxypentanoic acid

It has ester linkage

Excess of hydroxy pentanoic acid makes the polymer more tougher

It undergoes degradation by bacteria

answer is C.

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Detailed Solution

PHBV is Poly (3-hydroxybutyrate-co-3hydroxyvalerate) which is used in orthopaedic devices and in controlled release of drugs.Its monomers are 3-hydroxybutanoic acid and 3-hydroxypentanoic acid.

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From the above structure it is clear that it has ester linkage (-RCOOR-) too.

PHBV is also a biodegradable polymer so it undergoes degradation by bacteria.

Hence, option (C) is the correct option.

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