Examples of synthetic polymer $(X)$ and semi-synthetic polymer $(Y)$ are:

Which of the following sets contains only addition homopolymers?

$A$ polymer contains $50$ molecules with molecular mass $5,000$, $100$ molecules with molecular mass $10,000$ and $50$ molecules with molecular mass $15,000$. Calculate the number average molecular mass. (in $,000$)

Which of the following is an example of a copolymer?

Which of the following is not an example of an addition polymer?

Write the monomers used for getting the following polymers:
$(i)$ Polyvinyl chloride
$(ii)$ Teflon
$(iii)$ Bakelite