Which solid product is formed when calcium carbonate is strongly heated?
Answer and explanation
Correct answer: Calcium oxide
On thermal decomposition, calcium carbonate forms solid calcium oxide and carbon dioxide gas: \(\mathrm{CaCO_3(s) \xrightarrow{\Delta} CaO(s) + CO_2(g)}\). Therefore, the solid product is calcium oxide. Calcium hydroxide is formed when calcium oxide reacts with water, not by heating calcium carbonate alone.
Frequently asked questions
What is the correct answer to this question?
Calcium oxide
Why is this the correct answer?
On thermal decomposition, calcium carbonate forms solid calcium oxide and carbon dioxide gas: \(\mathrm{CaCO_3(s) \xrightarrow{\Delta} CaO(s) + CO_2(g)}\). Therefore, the solid product is calcium oxide. Calcium hydroxide is formed when calcium oxide reacts with water, not by 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.
