Question

Which kind of material is extinguished by water on burning?

• A. Wood
• B. Paper
• C. Petrol
• D. Both a and b

Answer 1

The correct option is D Both a and b

The most common fire extinguisher is water, but water works only when things like wood and paper are on fire.

Water is not useful in extinguishing fire due to petrol. Petrol is inflammable material. In such cases, carbon dioxide is used instead of water because it is heavier than oxygen and can cover fire like a blanket and cut off the oxygen supply to the fire and hence fire can be controlled.

Hence, option $D$ is correct.