Why is a mild edible acid mixed with baking soda in baking powder?
Answer and explanation
Correct answer: To produce carbon dioxide from baking soda
Baking powder contains baking soda, sodium hydrogen carbonate, together with a mild edible acid such as tartaric acid. When moistened and heated, the acid reacts with NaHCO₃ and produces carbon dioxide. The gas bubbles expand through the mixture and make cakes or bread light and spongy. Therefore option A is correct. The acid is not added to form a metal, darken food, or prevent gas formation; B, C, and D contradict the purpose of baking powder.
Frequently asked questions
What is the correct answer to this question?
To produce carbon dioxide from baking soda
Why is this the correct answer?
Baking powder contains baking soda, sodium hydrogen carbonate, together with a mild edible acid such as tartaric acid. When moistened and heated, the acid reacts with NaHCO₃ and produces carbon dioxide. The gas bubbles expand through the mixture and make cakes or bread light and spongy. Therefore option A is correct. The acid is not added to form a metal, darken food, or prevent gas formation; B, C, and D contradict the purpose of baking powder.
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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