How do kidnappers use chloroform in movies?

In the following sequence of reactions, the gaseous species $\mathrm{A}\text{,} \mathrm{B}\text{,} \mathrm{D}\text{,} \mathrm{E}$, respectively, are

Identify the compound $\mathrm{X}$ in the following reaction.

 ${\mathrm{CH}}_3{\mathrm{NO}}_2\underset{ \mathrm{Excess}}{\overset{{\mathrm{Cl}}_2/\mathrm{NaOH}}{\to }}\mathrm{X}$

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 $100\}$

Write a note on following-

Haloform Reaction.