Exercise-2.4 Page: 24 ( Is Matter Around Us Pure )
1. Classify the following as physical or chemical changes:
- Cutting of trees
- Melting of butter in a pan
- Rusting of almirah
- Boiling of water to form steam
- Passing of electric current through water and water breaking into hydrogen and oxygen gases.
- Dissolving common salt in water
- Making a fruit salad with raw fruits, and
- Burning of paper and wood
Solution:
The following is the classification into physical and chemical change
2. Try segregating the things around you as pure substances and mixtures.
Solution:
Listed below are the classifications based on pure substances and mixtures:
Category: CBSE Class 9th Science, Class 9th
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