Which product is formed when calcium oxide reacts with water?
Answer and explanation
Correct answer: Calcium hydroxide
Calcium oxide (CaO ) reacts with water (H₂O ) to form calcium hydroxide (Ca(OH)₂ ): \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\) . This is a combination reaction, and the product is called slaked lime. In contrast, calcium carbonate is formed when a calcium compound reacts with carbon dioxide, not simply with water.
Frequently asked questions
What is the correct answer to this question?
Calcium hydroxide
Why is this the correct answer?
Calcium oxide (CaO ) reacts with water (H₂O ) to form calcium hydroxide (Ca(OH)₂ ): \(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\) . This is a combination reaction, and the product is called slaked lime. In contrast, calcium carbonate is formed when a calcium compound reacts with carbon dioxide, not simply with water.
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.
