The polymer,which can be stretched and retains its original status on releasing the force is ....

Match the following:

Column-$A$	Column-$B$
$a.$ Nylon-$6$	$I.$ Natural Rubber
$b.$ Vulcanized Rubber	$II.$ Cross Linked
$c.$ cis-$1,4$-polyisoprene	$III.$ Caprolactam
$d.$ Polychloroprene	$IV.$ Neoprene

Choose the correct answer from the options given below:

Given below are two statements $:$
Statement $I :$ Wet cotton clothes made of cellulose$-based$ carbohydrate take a comparatively longer time to dry than wet nylon polymer$-based$ clothes.
Statement $II :$ Intermolecular hydrogen bonding with water molecules is more in nylon$-based$ clothes than in the case of cotton clothes.
In the light of the above statements,choose the correct answer from the options given below $:$

The polydispersity index of a polymer containing $10$ molecules with molecular mass $1.0 \times 10^4$ and $10$ molecules with molecular mass $1.0 \times 10^5$ is approximately.

Name the polymer used in laminating sheets and give the name of monomeric units involved in its formation.

Match the polymers in column $- A$ with their main uses in column $- B$ and choose the correct answer.

Column $- A$	Column $- B$
$(A)$ Polystyrene	$(i)$ Paints and lacquers
$(B)$ Glyptal	$(ii)$ Rain coats
$(C)$ Polyvinyl chloride	$(iii)$ Manufacture of toys
$(D)$ Bakelite	$(iv)$ Computer discs