Why can sodium hydrogen carbonate be used in fire extinguishers?
Answer and explanation
Correct answer: It can release carbon dioxide on heating
Sodium hydrogen carbonate, NaHCO₃, decomposes on heating according to the reaction 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂. The released carbon dioxide does not support combustion and forms a layer that reduces the contact between the fire and atmospheric oxygen. Therefore it can help extinguish flames. It does not burn hydrogen, increase fire, or form only water, so option A is correct.
Frequently asked questions
What is the correct answer to this question?
It can release carbon dioxide on heating
Why is this the correct answer?
Sodium hydrogen carbonate, NaHCO₃, decomposes on heating according to the reaction 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂. The released carbon dioxide does not support combustion and forms a layer that reduces the contact between the fire and atmospheric oxygen. Therefore it can help extinguish flames. It does not burn hydrogen, increase fire, or form only water, so option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
