What is the main reason for adding an acidic substance to baking powder?
Answer and explanation
Correct answer: To make baking soda produce carbon dioxide
The governing concept is an acid–carbonate reaction. Baking powder contains sodium hydrogen carbonate and a mild edible acid. When the mixture becomes moist and is heated, the acid reacts with NaHCO₃ and releases carbon dioxide, for example: acid + NaHCO₃ → salt + H₂O + CO₂. The gas bubbles expand in the batter and make it rise. Thus option A is correct; the other choices do not describe this reaction.
Frequently asked questions
What is the correct answer to this question?
To make baking soda produce carbon dioxide
Why is this the correct answer?
The governing concept is an acid–carbonate reaction. Baking powder contains sodium hydrogen carbonate and a mild edible acid. When the mixture becomes moist and is heated, the acid reacts with NaHCO₃ and releases carbon dioxide, for example: acid + NaHCO₃ → salt + H₂O + CO₂. The gas bubbles expand in the batter and make it rise. Thus option A is correct; the other choices do not describe this 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.
