Copper oxide forms salt and water with acid. What type of oxide is it?
Answer and explanation
Correct answer: Basic oxide
The governing concept is neutralisation between a basic metal oxide and an acid. Copper oxide reacts with hydrochloric acid as CuO + 2HCl → CuCl₂ + H₂O. Formation of salt and water from an oxide and an acid is characteristic of a basic oxide. Therefore option B is correct. Copper oxide is not an acidic oxide, it is a solid compound rather than a neutral gas, and it is not itself common salt.
Frequently asked questions
What is the correct answer to this question?
Basic oxide
Why is this the correct answer?
The governing concept is neutralisation between a basic metal oxide and an acid. Copper oxide reacts with hydrochloric acid as CuO + 2HCl → CuCl₂ + H₂O. Formation of salt and water from an oxide and an acid is characteristic of a basic oxide. Therefore option B is correct. Copper oxide is not an acidic oxide, it is a solid compound rather than a neutral gas, and it is not itself common salt.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
