Formaldehyde is not present as a monomer in:

Which of the following features is not true about low density polythene?

Which of the following fibres are made of polyamides?

Match the following List-$I$ (Monomer/s) with List-$II$ (Name of the polymer) and select the correct answer:
| List-$I$ (Monomer/s) | List-$II$ (Name of the polymer) |
| :--- | :--- |
| $A$. $CF_2=CF_2$ | $I$. Neoprene |
| $B$. $NH_2(CH_2)_6NH_2, HO_2C(CH_2)_4CO_2H$ | $II$. Bakelite |
| $C$. $C_6H_5OH, HCHO$ | $III$. Teflon |
| $D$. $CH_2=CH(Cl)-CH=CH_2$ | $IV$. Nylon $6, 6$ |

Match the List-$I$ with List-$II$ in the following.

List-$I$	List-$II$
$1$. Caprolactam	$a$. $(-CH_2-CH(CH_3)-)_n$
$2$. Vinyl chloride	$b$. $(-CH_2-CH(C_6H_5)-)_n$
$3$. Styrene	$c$. $(-CH_2-CH(Cl)-)_n$
$4$. Propene	$d$. $(-CO-(CH_2)_5-NH-)_n$

Which of the following structures represents the Neoprene polymer?