Question

State four properties of chemical change,​

Answer 1

1.Change in Temperature.
2.Change in Color.
3.Formation of bubbles
4.Formation of precipitate

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Answer 2

Four properties of a chemical change are :

1. Change in colour : In some reaction a chemical change is indicated by a change in colour.

2. Formation of a precipitate : Sometimes, when two clear solutions combine an insoluble solid is formed that settles down is precipitate.

3. Evolution of a gas : Sometimes, a gas is released during a chemical reaction.

4. Generation of light and sound : Explosion of a firecracker is a chemical change that produces light, sound and heat.

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