Which pair of products is formed when calcium carbonate is heated?
Answer and explanation
Correct answer: Calcium oxide and carbon dioxide
Calcium carbonate undergoes thermal decomposition on heating:
\(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\).
Therefore, the products are calcium oxide and carbon dioxide. Calcium hydroxide is formed when calcium oxide reacts with water; it is not formed by directly heating calcium carbonate.
Frequently asked questions
What is the correct answer to this question?
Calcium oxide and carbon dioxide
Why is this the correct answer?
Calcium carbonate undergoes thermal decomposition on heating:
\(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\).
Therefore, the products are calcium oxide and carbon dioxide. Calcium hydroxide is formed when calcium oxide reacts with water; it is not formed by directly heating calcium carbonate.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
