Which of the following compounds is formed when chloroform $(CHCl_3)$ is exposed to air and light?

Which of the following compounds is obtained when $t$-butyl bromide is treated with alcoholic ammonia?

Describe the chemical reactions of haloalkanes.

$A$ $(C_{4}H_{8}Cl_{2})$ $\xrightarrow{\text{Hydrolysis at } 373 \text{ K}}$ $B$ $(C_{4}H_{8}O)$
$B$ reacts with hydroxylamine but does not give Tollen's test. Identify $A$ and $B$.

Which of the following is most reactive towards $S_N2$ reaction?

Dehydrohalogenation in the presence of $OH^{-}$ is correctly represented by: