The synthetic rubber that resembles natural rubber is .....

Which of the following is a biodegradable polymer?

Observe the following polymers.
$I$. $PHBV$
$II$. Nylon-$2$-nylon-$6$
$III$. Glyptal
$IV$. Bakelite
Which of the above is/are biodegradable polymer$(s)$?

Discuss the main purpose of vulcanisation of rubber.

Which of the following is an example of a fibre?

Match the following items in List-$I$ with their corresponding monomer units in List-$II$.

List-$I$	List-$II$
$A$. Natural rubber	$i$. $\beta$-glucose
$B$. Cellulose	$ii$. Isoprene
$C$. Nylon-$6$	$iii$. Tetrafluoroethylene
$D$. Teflon	$iv$. Caprolactam