Chloroethene is an allylic halide.

Match the following:

The given compound

is an example of 

Classify the following compound as a primary, secondary, or tertiary halide, $1-$Bromobut$-2-$ene.

Name the following halide according to IUPAC system and classify it as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halide:

$\mathrm{m}-\mathrm{C}\mathrm{l}\mathrm{C}{\mathrm{H}}_2{\mathrm{C}}_6{\mathrm{H}}_4\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\left(\mathrm{C}{\mathrm{H}}_3\right)}_3$

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$