Chloroform is stored in closed, dark coloured bottles completely filled so that air is kept out, because in light it is slowly oxidised by air to
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Chloroform is slowly oxidised by air in the presence of light to the extremely poisonous gas carbonyl chloride, also known as phosgene. It is therefore stored in closed, dark coloured bottles completely filled so that air is kept out.
- B.
Carbon tetrachloride is a different polyhalogen compound, not an air-oxidation product of chloroform.
- C.
Methylene chloride (dichloromethane) is not formed by oxidation of chloroform.
- D.
Chloropicrin is formed from chloroform and nitric acid, not by air oxidation in light.
NCERT: Class 12 Chemistry, Unit 6 (Haloalkanes and Haloarenes), Polyhalogen Compounds: Trichloromethane (Chloroform)