Which gas is formed when an acid reacts with a carbonate?
Answer and explanation
Correct answer: Carbon dioxide
Acids react with carbonates to form three products: a salt, water, and carbon dioxide gas. The general equation is acid + carbonate → salt + water + CO₂; for example, 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂. Therefore option B is correct. Hydrogen is associated with acid-metal reactions, whereas chlorine and ammonia are not normal products of an acid-carbonate reaction.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
Acids react with carbonates to form three products: a salt, water, and carbon dioxide gas. The general equation is acid + carbonate → salt + water + CO₂; for example, 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂. Therefore option B is correct. Hydrogen is associated with acid-metal reactions, whereas chlorine and ammonia are not normal products of an acid-carbonate 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.
