Which among the following polymers is used for making handles of cooker?

What is copolymerization? Explain its preparation,properties and uses with an example.

If $\bar{M}_w$ is the weight average molecular weight and $\bar{M}_n$ is the number average molecular weight of a polymer, the poly dispersity index $(PDI)$ of the polymer is given by

Which of the following is an incorrect match for the pair of $\text{Polymer} - \text{Monomer}$?

Synthetic polymers do not degrade in the environment for a long time. How can biodegradable synthetic polymers be made? Differentiate between biopolymers and biodegradable polymers and give examples of each type.

The correct match between Item-$I$ and Item-$II$ :

Item-$I$	Item-$II$
$a$. Natural rubber	$I$. $1,3-$butadiene $+$ styrene
$b$. Neoprene	$II$. $1,3-$butadiene $+$ acrylonitrile
$c$. Buna$-N$	$III$. Chloroprene
$d$. Buna$-S$	$IV$. Isoprene