Question

# $CC{{l}_{4}}$ is used as fire extinguisher because:a.) Its melting point is highb.) It forms covalent bondc.) Its boiling point is lowd.) It gives incombustible vapours

Hint: The chemical name of $CC{{l}_{4}}$is carbon tetrachloride. It is an organic chemical. The melting point of carbon tetrachloride is 22.4 $^{o}C$ and the boiling point is 76.72$^{o}C$. Means it has low melting point and has high boiling point.

$CC{{l}_{4}}$is used as fire extinguishers under the name of pyrene.
The dense vapours of carbon tetrachloride forms a protective layer on the burning objects and avoids the oxygen or air to come in contact with the fire from the burning objects and provides incombustible vapours.
So, the correct answer is “Option D”.

Note: We can use $CC{{l}_{4}}$ in the home as a spot remover of fire but it is better to avoid the usage of it because of its poisonous nature. The structure of the carbon tetrachloride is tetrahedral and it resembles the structure of methane.