21. What are the characteristics of Chemical change
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Answer:
The characteristics of chemical change are-
1. Shape can change the substance .
2. New substance is formed.
3. It is not reversible change.
4. It is a permanent change.
5. The properties of substance are not retain.
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Answer:
The signs of chemical change include changes in color, temperature, the production of light, changes in odor, and the formation of gases.
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