Write a note on the halogen compounds containing $sp^{3} C - X$ bonds with examples.

(N/A) Halogen compounds containing $sp^{3} C - X$ bonds are those in which the halogen atom is bonded to an $sp^{3}$-hybridised carbon atom. These include:
$1$. Alkyl halides $(R-X)$: The halogen atom is bonded to an alkyl group. Examples include $CH_3-CH_2-X$ (Ethyl halide).
$2$. Allylic halides: The halogen atom is bonded to an $sp^{3}$-hybridised carbon atom next to a carbon-carbon double bond $(C=C)$. Example: $CH_2=CH-CH_2-X$.
$3$. Benzylic halides: The halogen atom is bonded to an $sp^{3}$-hybridised carbon atom attached to an aromatic ring. Example: $C_6H_5-CH_2-X$.