Which gas is released when an acid reacts with a carbonate?
Answer and explanation
Correct answer: Carbon dioxide
Acids react with carbonates to produce three products: a salt, water, and carbon dioxide. 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. Therefore option B is correct. Hydrogen is associated with acid-metal reactions, whereas nitrogen and oxygen are not the characteristic gases released by acid-carbonate reactions.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
Acids react with carbonates to produce three products: a salt, water, and carbon dioxide. 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. Therefore option B is correct. Hydrogen is associated with acid-metal reactions, whereas nitrogen and oxygen are not the characteristic gases released by acid-carbonate reactions.
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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