The polymer used for making contact lenses for eyes is

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.

In polymer Buna-$S$,'$S$' stands for :-

Identify the monomers in the following polymeric structures:
$(i)$ $-[CO-(CH_2)_8-CO-NH-(CH_2)_6-NH]-_n$
$(ii)$ Melamine-formaldehyde polymer

The monomer of Teflon is :-

Match List-$I$ with List-$II$.

List-$I$ (Name of polymer)	List-$II$ (Uses)
$A$. Glyptal	$I$. Flexible pipes
$B$. Neoprene	$II$. Synthetic wool
$C$. Acrilan	$III$. Paints and Lacquers
$D$. $LDP$	$IV$. Gaskets

Choose the correct answer from the options given below: