Question

(30)
d) Some examples of physical and chemical change
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Answer 1

Answer:

Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical reaction.

Explanation:

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Answer 2

Answer:

Examples of Chemical Change

1. Burning of paper and log of wood.
2. Digestion of food.
3. Boiling an egg.
4. Chemical battery usage.
5. Electroplating a metal.
6. Baking a cake.
7. Milk going sour.

Examples of Physical Changes

1. Crushing a can.
2. Melting an ice cube.
3. Boiling water.
4. Mixing sand and water.
5. Breaking a glass.
6. Dissolving sugar and water.
7. Shredding papers

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