Why are bubbles formed when baking soda is added to lemon juice?
Answer and explanation
Correct answer: Carbon dioxide forms from reaction between lemon acid and baking soda
Lemon juice contains citric acid, while baking soda is sodium hydrogen carbonate, NaHCO₃. An acid reacting with a hydrogen carbonate produces a salt, water, and carbon dioxide: acid + hydrogen carbonate → salt + H₂O + CO₂. The carbon dioxide escapes as visible bubbles or fizz. No metal is formed, and the observation itself proves that a reaction occurs, so option A is correct.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide forms from reaction between lemon acid and baking soda
Why is this the correct answer?
Lemon juice contains citric acid, while baking soda is sodium hydrogen carbonate, NaHCO₃. An acid reacting with a hydrogen carbonate produces a salt, water, and carbon dioxide: acid + hydrogen carbonate → salt + H₂O + CO₂. The carbon dioxide escapes as visible bubbles or fizz. No metal is formed, and the observation itself proves that a reaction occurs, so option A is correct.
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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