`C Cl_(4)` is a well known fire extinguisher. However after using it to extinguish fire the room should be well ventilated. This is because:

Options

A. It is flammable at higher temperatures
B. It is toxic
C. It produces phosgene by reaction with water vapour at higher temperatures
D. It is corrosive

Answer

C

Explanation

Carbon tetrachloride vapours react with steam above `500^@`C to form phosgene, a poisonous gas
`CCl_4+H_2O overset(500^@C)(rarr)underset("Phosgene")(COCl_2)+2HCl`
The dense vapour forms a protective layer on the burning objects and prevents the oxygen or air to come in contact with the burning object.