Which gas is released when an acid reacts with a carbonate?
Answer and explanation
Correct answer: Carbon dioxide
An acid reacts with a carbonate to produce a salt, water, and carbon dioxide gas. The general equation is acid + carbonate → salt + water + CO₂. For example, hydrochloric acid reacts with calcium carbonate to form calcium chloride, water, and carbon dioxide. Thus option B is correct. Hydrogen is normally released with active metals, not carbonates, while chlorine and ammonia are not products of this reaction.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
An acid reacts with a carbonate to produce a salt, water, and carbon dioxide gas. The general equation is acid + carbonate → salt + water + CO₂. For example, hydrochloric acid reacts with calcium carbonate to form calcium chloride, water, and carbon dioxide. Thus option B is correct. Hydrogen is normally released with active metals, not carbonates, while chlorine and ammonia are not products of 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.
