Which among the following polymers is obtained by ring opening polymerization process?

Bakelite is obtained from phenol by reacting with

The two monomers for the synthesis of Nylon $6, 6$ are

Which among the following is an example of a cyclic amide?

Which of the following polymers is obtained from $C_2F_4$?

The correct statement regarding $X$ and $Y$ in the following set of reactions is:
$nCH_2=CH_2 \xrightarrow[(C_2H_5)_3Al, TiCl_4]{333-343 \ K, 6-7 \ atm} Y$
$nCH_2=CH_2 \xrightarrow[(C_6H_5COO)_2]{350-570 \ K, 1000-2000 \ atm} X$