Which gas can be released when baking soda is heated?
Answer and explanation
Correct answer: Carbon dioxide
Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it decomposes according to 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂, so carbon dioxide gas is released and option A is correct. The carbon dioxide forms bubbles and can help cakes or bread rise when the gas is trapped in the mixture. Hydrogen, oxygen, and nitrogen are not products of this decomposition.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it decomposes according to 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂, so carbon dioxide gas is released and option A is correct. The carbon dioxide forms bubbles and can help cakes or bread rise when the gas is trapped in the mixture. Hydrogen, oxygen, and nitrogen are not products of this decomposition.
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.
