Which gas is formed when an acid reacts with a carbonate?
Answer and explanation
Correct answer: Carbon dioxide
Acids react with carbonates in a characteristic reaction that produces a salt, water, and carbon dioxide. In general, acid + carbonate → salt + water + CO₂; for example, 2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂. Therefore option B is correct. Hydrogen is associated with many acid-metal reactions, whereas oxygen and chlorine 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?
Acids react with carbonates in a characteristic reaction that produces a salt, water, and carbon dioxide. In general, acid + carbonate → salt + water + CO₂; for example, 2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂. Therefore option B is correct. Hydrogen is associated with many acid-metal reactions, whereas oxygen and chlorine 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.
