Which products are formed when calcium carbonate is heated?
Answer and explanation
Correct answer: Calcium oxide and carbon dioxide
On heating, calcium carbonate undergoes thermal decomposition:
\(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\)
Therefore, calcium oxide and carbon dioxide are formed. Option A is incorrect because calcium hydroxide and water are associated with the reaction of calcium oxide with water, not with heating calcium carbonate alone.
Frequently asked questions
What is the correct answer to this question?
Calcium oxide and carbon dioxide
Why is this the correct answer?
On heating, calcium carbonate undergoes thermal decomposition:
\(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\)
Therefore, calcium oxide and carbon dioxide are formed. Option A is incorrect because calcium hydroxide and water are associated with the reaction of calcium oxide with water, not with heating calcium carbonate alone.
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.
