Copper oxide forms salt and water with acid. What type of oxide is it?
Answer and explanation
Correct answer: Basic oxide
Copper oxide, CuO, is a metal oxide. Its reaction with hydrochloric acid is CuO + 2HCl → CuCl₂ + H₂O. A substance that reacts with an acid to form salt and water is showing basic oxide behaviour through neutralisation. Hence option B, basic oxide, is correct. It is not an acidic oxide, a gas or a common salt; those options do not describe the stated reaction or the substance’s composition.
Frequently asked questions
What is the correct answer to this question?
Basic oxide
Why is this the correct answer?
Copper oxide, CuO, is a metal oxide. Its reaction with hydrochloric acid is CuO + 2HCl → CuCl₂ + H₂O. A substance that reacts with an acid to form salt and water is showing basic oxide behaviour through neutralisation. Hence option B, basic oxide, is correct. It is not an acidic oxide, a gas or a common salt; those options do not describe the stated reaction or the substance’s composition.
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.
