As the molecular weight increases,the tensile strength of polymers:

Match List-$I$ with List-$II$ :

List-$I$ (Polymer)	List-$II$ (Used for items)
$A$. $Nylon\,6,6$	$I$. $Bristles\,of\,brushes$
$B$. $Low\,density\,polythene$	$II$. $Toys$
$C$. $High\,density\,polythene$	$III$. $Buckets$
$D$. $Teflon$	$IV$. $Non-stick\,utensils$

Choose the correct answer from the options given below.

If a polythene sample contains two monodisperse fractions in the ratio $2:3$ with degree of polymerization $100$ and $200$,respectively,then its weight average molecular weight will be

Which of the following is Teflon?

Which of the following is a biodegradable polymer?

Terylene is