Differentiate between homogenous and heterogeneous mixtures with examples.

How are sol, solution and suspension different from each other?

Classify the following as chemical or physical changes:

1. Cutting of trees
2. Melting of butter in a pan
3. Rusting of almirah
4. Boiling of water to form steam
5. Passing of electric current through water and the water breaking down into hydrogen and oxygen gases.
6. Dissolving common salt in water
7. Making a fruit salad with raw fruits, and
8. Burning of paper and wood

Try segregating the things around you as pure substances and mixtures.