What is the correct difference between melting of ice and burning of a candle?
Answer and explanation
Correct answer: बर्फ का पिघलना भौतिक परिवर्तन है, जबकि मोमबत्ती का जलना रासायनिक परिवर्तन है।
When ice melts, only its state changes from solid to liquid; no new substance is formed, so it is a physical change. Near the wick, wax vapour burns to form new substances such as carbon dioxide and water vapour, so burning is a chemical change. Melting of wax is physical, but burning of wax is chemical.
Frequently asked questions
What is the correct answer to this question?
बर्फ का पिघलना भौतिक परिवर्तन है, जबकि मोमबत्ती का जलना रासायनिक परिवर्तन है।
Why is this the correct answer?
When ice melts, only its state changes from solid to liquid; no new substance is formed, so it is a physical change. Near the wick, wax vapour burns to form new substances such as carbon dioxide and water vapour, so burning is a chemical change. Melting of wax is physical, but burning of wax is chemical.
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.
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