Which gas is formed when an acid reacts with a carbonate?
Answer and explanation
Correct answer: Carbon dioxide
When an acid reacts with a carbonate, the products are a salt, water, and carbon dioxide. The overall pattern is acid + carbonate → salt + H₂O + 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, while chlorine and ammonia are not normal products of this reaction.
Frequently asked questions
What is the correct answer to this question?
Carbon dioxide
Why is this the correct answer?
When an acid reacts with a carbonate, the products are a salt, water, and carbon dioxide. The overall pattern is acid + carbonate → salt + H₂O + 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, while chlorine and ammonia are not normal 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.
