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Which of the following changes is a chemical change? 1) Melting ice 2) Burning of paper 3) Dissolving sugar in water 4) Boiling water

medium MCQ 3 marks Class 7 · Science · Physical and Chemical Changes
  1. Melting ice
  2. Burning of paper
  3. Dissolving sugar in water
  4. Boiling water
Answer
Burning of paper

The correct answer is Burning of paper — Boiling water is a physical change – liquid to gas of same substance.

Step-by-step solution

  1. A chemical change involves the formation of a new substance.
  2. Melting ice is a physical change – solid to liquid of same substance.
  3. Burning of paper produces ash and gases – new substances, so it’s chemical.
  4. Dissolving sugar in water is physical – sugar molecules remain intact.
  5. Boiling water is a physical change – liquid to gas of same substance.
Common mistake: Selecting boiling water as chemical change

Concept tested: Recognising chemical changes among common processes

Published · How this solution was prepared and checked

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