Ncert Exercises & Solutions

Which of the following polymer is biodegradable?

1. $(C H_{2} - \underset{\underset{C l}{|}}{C} = C H - C H_{2})_{n}$

2. $(C H_{2} - C H = C H - C H_{2} - C H_{2} - \overset{\overset{C N}{|}}{C} H)_{n}$

3. $(O - C H - C H_{2} - C - O - C H - C H_{2} - C)_{n}$
$| | | | | |$
$C H_{3} O C H_{2} C H_{3} O$

4. $(\overset{\overset{N}{|}}{N} - {(C N_{2})}_{6} - \overset{\overset{H}{|}}{N} - \overset{\overset{O}{| |}}{C} - {(C H_{2})}_{4} - \overset{\overset{O}{| |}}{C})$ _n

Hint: Poly β-hydroxybutyrate – co-β-hydroxy valerate (PHBV) and Nylon 2–nylon 6 are biodegradable Polymers

The Poly β-hydroxybutyrate – co-β-hydroxy valerate (PHBV) and Nylon 2–nylon 6 are the two biodegradable Polymers. The structures are as follows:

$(O - C H - C H_{2} - C - O - C H - C H_{2} - C)_{n}$
$| | | | | |$
$C H_{3} O C H_{2} C H_{3} O$

Poly $β$ —hydroxybutyrate - co- $β$ -hydroxyvalerate is an example of a biodegradable polymer

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