Question

Write the characteristics of a chemical change class 7 science​

Answer 1

Answer:

Some characteristics of chemical changes are :

1.A new substance is formed.

2.It is a permanent change.

3.The composition of new substance changes.

4.It is irreversible.

5.Heat or light evolved or absorbed during change.

Explanation:

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Answer 2

1. Evolution of gas

2. Changes in Color

3. May have Odor

4. Formation of a Precipitate

5. May be Endothermic Reaction

6. May be Exothermic Reaction

7. New substance is formed

8. Maximum chemical changes are not reversable

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