What is the polymer of prop-$2$-enenitrile called?

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

$A$ polymer sample contains $3$ molecules of molar mass $10^3$, $3$ molecules of molar mass $500$, and $4$ molecules of molar mass $200$. What is its weight average molecular mass?

What is a polymer? What can we say about the molecular mass of a polymer? In which four industries are polymers mostly used?

Which of the following is a common use of $HDPE$ (High-Density Polyethylene)?

Which of the following is not a polyamide fibre?