Which gas is formed when an acid reacts with a carbonate?
Answer and explanation
Correct answer: Carbon dioxide
Acids react with carbonates to produce a salt, water, and carbon dioxide gas. The general reaction is acid + carbonate → salt + H₂O + CO₂; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Thus option B is correct. Hydrogen is released in many acid–metal reactions, whereas chlorine and ammonia require different reactants and are not general products here.
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 a salt, water, and carbon dioxide gas. The general reaction is acid + carbonate → salt + H₂O + CO₂; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Thus option B is correct. Hydrogen is released in many acid–metal reactions, whereas chlorine and ammonia require different reactants and are not general products here.
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.
