Question

When chloroform is treated with oxygen, it forms:
(A) $COC{l_2} + HCl$
(B) $COC{l_2} + C{l_2} + {H_2}$
(C) $COC{l_2} + C{l_2} + {H_2}O$
(D) no product will be formed

Answer 1

Chloroform is halogen derivatives of alkane. Its formula is $CHC{l_3}$.
Chloroform is formed by replacing 3 H-atoms of methane by chlorine in presence of sunlight.
Its IUPAC name is Trichloromethane.

Complete answer:
Chloroform is colorless, volatile liquid and generally stored in dark colour bottles filled up to brim.
If it reacts with oxygen in presence of light it gives carbonyl chloride.
$CHC{l_3} + \dfrac{1}{2}{O_2}\xrightarrow{{sunlight}}COC{l_2} + HCl$
Carbonyl chloride is also known as phosgene gas.
To prevent formation of phosgene gas, chloroform should be stored in dark bottles with a small percentage of ethanol added.

Therefore, from the above explanation the correct option is (A) $COC{l_2} + HCl.$

Additional Information: Chloroform is colorless, volatile liquid and has ether like odor. Formally it is used as an inhaled anesthetic surgery.
Today it is used as solvent in industry, where used in production of refrigerant from.
Chloroform is denser than water and slightly soluble in water. Hence, sink in water.
It may cause illness by inhalation, skin absorption or ingestion. Chloroform adopts tetrahedral geometry.

Note: Oxidation of chloroform is a dangerous reaction. It releases poisonous gas.
In the past chloroform was used as an inhaled anesthetic drug during surgery but it is not used that day. Today it is used to make other chemicals.