How does baking soda help food rise on heating?
Answer and explanation
Correct answer: By producing carbon dioxide gas
Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it undergoes thermal decomposition: 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂. The released carbon dioxide forms bubbles in the dough or batter, and these expanding bubbles make the food rise. Hence option A is correct. The process is not caused by stopping hydrogen, absorbing oxygen, or solidifying water, so B, C, and D are incorrect.
Frequently asked questions
What is the correct answer to this question?
By producing carbon dioxide gas
Why is this the correct answer?
Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it undergoes thermal decomposition: 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂. The released carbon dioxide forms bubbles in the dough or batter, and these expanding bubbles make the food rise. Hence option A is correct. The process is not caused by stopping hydrogen, absorbing oxygen, or solidifying water, so B, C, and D are incorrect.
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.
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