Question

In fire extinguisher, pyrene is.

• A. $CO_{2}$
• B. $CCl_{4}$
• C. $CS_{2}$
• D. $CHCl_{3}$

Answer 1

Answer: (B)

$CCl_{4}$

Answer 2

$CCl_{4}$ is stable to red heat. Its vapours are highly non-inflammable i.e. do not catch fire. It is because of this property $CCl_{4}$ is used as a fire extinguisher. But now a days its use as a fire extinguisher is restricted because with water vaporous. It forms highly poisonous phosgene gas.$CCl_{4} + H_{2}O \rightarrow \underset{\text{Phosgene}}{COCl_{2}} + 2HCl$