Benzene hexachloride $(BHC)$ is used as

Some halogen-containing compounds are useful in daily life. Some compounds of this class are responsible for the exposure of flora and fauna to increasing amounts of $UV$ light,which causes significant destruction. Name the class of these halocompounds. In your opinion,what should be done to minimize the harmful effects of these compounds?

Write about the use of triiodomethane (iodoform) $CHI_3$.

Which of the following is used in photography?

Which silver halide is used in medicine?

Benzene hexachloride is used as a......