Consider the following sequence of reaction

$$ 2 \mathrm{CH}_3 \mathrm{Cl}+\mathrm{Si} \xrightarrow[573 \mathrm{~K}]{\mathrm{Cu}} X \xrightarrow{\mathrm{H}_2 \mathrm{O}} Y \xrightarrow{\text { Polymerisation }} Z $$

The repeating structural unit in Z is

Polymer $X$ is an example of polyester and $Y$ is an example of polyamide $X$ and $Y$ are respectively

$$ \text { Match the following. } $$

The correct answer is

Neoprene is the polymer of a monomer $X$. IUPAC name of $X$ is