Why is carbon dioxide considered both a non-metal oxide and an acidic oxide?
Answer and explanation
Correct answer: Because it is an oxide of carbon and can form an acidic solution in water
An oxide is classified partly by the element combined with oxygen and partly by its reaction with water or bases. Carbon is a non-metal, so CO₂ is a non-metal oxide. In water it forms carbonic acid: CO₂ + H₂O ⇌ H₂CO₃, and it reacts with bases to form salts and water. It therefore shows acidic oxide behaviour. The litmus and metal-based alternatives contradict these facts, so A is correct.
Frequently asked questions
What is the correct answer to this question?
Because it is an oxide of carbon and can form an acidic solution in water
Why is this the correct answer?
An oxide is classified partly by the element combined with oxygen and partly by its reaction with water or bases. Carbon is a non-metal, so CO₂ is a non-metal oxide. In water it forms carbonic acid: CO₂ + H₂O ⇌ H₂CO₃, and it reacts with bases to form salts and water. It therefore shows acidic oxide behaviour. The litmus and metal-based alternatives contradict these facts, so A is correct.
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.
