$Chloral + Chlorobenzene \xrightarrow{conc. H_2SO_4} \text{product}$.
The product is :-

State the various uses of :
$(i)$ Dichloromethane (Methylene chloride)
$(ii)$ Trichloromethane (Chloroform)
$(iii)$ Tri-iodomethane (Iodoform)
$(iv)$ Tetrachloromethane (Carbon tetrachloride)
$(v)$ Freons

Which of the following is an anaesthetic?

Match List-$I$ with List-$II$.

List-$I$ Compound	List-$II$ Use
$A$. Carbon tetrachloride	$I$. Paint remover
$B$. Methylene chloride	$II$. Refrigerators and air conditioners
$C$. $DDT$	$III$. Fire extinguisher
$D$. Freons	$IV$. Non-biodegradable insecticide

Choose the correct answer from the options given below:

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

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?