Which substance is used with acid in a soda-acid fire extinguisher to produce carbon dioxide?
Answer and explanation
Correct answer: Sodium hydrogen carbonate
A soda-acid fire extinguisher uses sodium hydrogen carbonate, NaHCO₃, together with an acid. Their reaction produces carbon dioxide, for example NaHCO₃ + HCl → NaCl + H₂O + CO₂. The released CO₂ does not support combustion and forms a layer that helps cut off oxygen from the fire. Therefore option A is correct. Sodium hydroxide and calcium oxide are bases, while sodium chloride does not release CO₂ with acid.
Frequently asked questions
What is the correct answer to this question?
Sodium hydrogen carbonate
Why is this the correct answer?
A soda-acid fire extinguisher uses sodium hydrogen carbonate, NaHCO₃, together with an acid. Their reaction produces carbon dioxide, for example NaHCO₃ + HCl → NaCl + H₂O + CO₂. The released CO₂ does not support combustion and forms a layer that helps cut off oxygen from the fire. Therefore option A is correct. Sodium hydroxide and calcium oxide are bases, while sodium chloride does not release CO₂ with acid.
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.
