Which gas does baking soda give on reacting with an acid?
Answer and explanation
Correct answer: Carbon dioxide
Baking soda is sodium hydrogen carbonate, NaHCO₃. Carbonates and hydrogen carbonates react with acids to form a salt, water, and carbon dioxide; for example, NaHCO₃ + HCl → NaCl + H₂O + CO₂. Effervescence is caused by the released carbon dioxide gas, so option B is correct. Hydrogen, chlorine, and oxygen are not products of this ordinary acid–bicarbonate reaction.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
Baking soda is sodium hydrogen carbonate, NaHCO₃. Carbonates and hydrogen carbonates react with acids to form a salt, water, and carbon dioxide; for example, NaHCO₃ + HCl → NaCl + H₂O + CO₂. Effervescence is caused by the released carbon dioxide gas, so option B is correct. Hydrogen, chlorine, and oxygen are not products of this ordinary acid–bicarbonate 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.
