Ethylene glycol and terephthalic acid are monomers of which of the following polymer?

The number average molecular mass of a polymer that contains $15$ molecules with each of mass $8,000$ and $15$ molecules with each of mass $80,000$ is: (in $,000$)

Match the polymers given in Column-$I$ with their repeating units given in Column-$II$.

Column-$I$	Column-$II$
$A$. Acrilan	$i$. $-[CH_2-CH(CN)]_n-$
$B$. Polystyrene	$ii$. $-[CH_2-CH(C_6H_5)]_n-$
$C$. Neoprene	$iii$. $-[CH_2-C(Cl)=CH-CH_2]_n-$
$D$. Novolac	$iv$. $-[CH_2-CH=CH-CH_2-CH_2-CH(CN)]_n-$
$E$. Buna-$N$	$v$. Linear phenol-formaldehyde polymer

Identify the use of polystyrene for household purposes.

Which of the following polymers contains nitrogen?

In which of the following pairs is the polymer correctly matched with the intermolecular forces present in them?

$A$. Neoprene --- Weak intermolecular forces	$B$. Terylene --- Hydrogen bonding
$C$. Polystyrene --- Very weak intermolecular forces	$D$. Polythene --- Hydrogen bonding