Why is zinc oxide called amphoteric?
Answer and explanation
Correct answer: Because it can react with both acids and bases
An amphoteric substance can react with both an acid and a base. Zinc oxide reacts with hydrochloric acid to form zinc chloride and water: ZnO + 2HCl → ZnCl2 + H2O. It also reacts with a strong alkali such as sodium hydroxide to form a soluble zincate. Therefore, option A correctly explains its name; the other choices do not define amphoterism.
Frequently asked questions
What is the correct answer to this question?
Because it can react with both acids and bases
Why is this the correct answer?
An amphoteric substance can react with both an acid and a base. Zinc oxide reacts with hydrochloric acid to form zinc chloride and water: ZnO + 2HCl → ZnCl2 + H2O. It also reacts with a strong alkali such as sodium hydroxide to form a soluble zincate. Therefore, option A correctly explains its name; the other choices do not define amphoterism.
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.
