Question

In foam type extinguisher _____ is present in the cylinder.

• A. $A{l}_2(S{O}_4{)}_3$
• B. $NaHC{O}_3$
• C. $N{a}_{2}S{O}_4$
• D. $Al(OH{)}_3$

Answer 1

The correct option is B $NaHC{O}_3$

Sodium bicarbonate $\left(NaHC{O}_3\right)$ is a dry chemical used in foam type fire extinguishers, and is meant for extinguishing class B and class C fires. It is a nontoxic, noncorrosive dry chemical which requires minimal cleanup. Dry chemical extinguishers work by smothering the fire , when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it and the fire goes out.