Which product is not formed when baking soda is heated?
Answer and explanation
Correct answer: Sodium hydroxide
Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it undergoes thermal decomposition: 2NaHCO₃ → Na₂CO₃ + CO₂ + H₂O. Thus sodium carbonate, carbon dioxide, and water are the three products formed. Sodium hydroxide does not appear in this balanced equation and is therefore the product that is not formed. This is a decomposition reaction, not a neutralisation reaction.
Frequently asked questions
What is the correct answer to this question?
Sodium hydroxide
Why is this the correct answer?
Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it undergoes thermal decomposition: 2NaHCO₃ → Na₂CO₃ + CO₂ + H₂O. Thus sodium carbonate, carbon dioxide, and water are the three products formed. Sodium hydroxide does not appear in this balanced equation and is therefore the product that is not formed. This is a decomposition reaction, not a neutralisation reaction.
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.
