Which is the correct pair of solid and gaseous products formed when calcium carbonate is heated?
Answer and explanation
Correct answer: Calcium oxide and carbon dioxide
Calcium carbonate undergoes thermal decomposition: \(\mathrm{CaCO_3(s) \xrightarrow{\Delta} CaO(s) + CO_2(g)}\). Therefore, calcium oxide is the solid product and carbon dioxide is the gaseous product. Forming calcium hydroxide and hydrogen would require a source of water or hydrogen, which is not present in this reaction.
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: \(\mathrm{CaCO_3(s) \xrightarrow{\Delta} CaO(s) + CO_2(g)}\). Therefore, calcium oxide is the solid product and carbon dioxide is the gaseous product. Forming calcium hydroxide and hydrogen would require a source of water or hydrogen, which is not present in this reaction.
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.
