Question

Classify the following as physical or chemical change - boiling of water , digestion of food , rusting of iron , dissolving salt in water

Answer 1

Answer:

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Explanation:

Physical Change

1. boiling of water
2. dissolving salt in water.

Chemical change

1. digestion of food.
2. rusting of iron

Answer 2

1. Cutting of trees: Physical change.

2. Melting of butter in a pan: Physical change.

3. Rusting of almirah: chemical change.

4. Boiling of water to form steam: physical change.

5. Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases: chemical change.

6. Dissolving common salt in water: physical change.

7. Making a fruit salad with raw fruits: physical change.

8. Burning of paper and wood: chemical change.