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A candle is lit and the wax melts, but the chemical composition of the wax remains unchanged. This is an example of: 1. Physical change 2. Chemical change 3. Both 4. None

easy MCQ 4 marks Class 7 · Science · Physical and Chemical Changes
  1. Physical change
  2. Chemical change
  3. Both
  4. None
Answer
Physical change

The correct answer is Physical change — Conclude that the process is a physical change because only the state of matter changes.

Step-by-step solution

  1. Identify that melting does not alter the composition of the wax.
  2. Recognise that the chemical formula of the wax remains the same after melting.
  3. Conclude that the process is a physical change because only the state of matter changes.
Common mistake: Thinking that melting implies a chemical change

Concept tested: Physical change identification

Published · How this solution was prepared and checked

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