Question

properties of chemical reaction answer explain in points

Answer 1

-involvement of light energy and heat energy.
-the substance changes entirely at the end of reaction.
-formation of new substance with new chemical and physical properties.

Irreversible change.

Answer 2

Properties of chemical reactions are:-
1. New substance are formed .
2. A gas may be formed , producing bubbles and also distinct smell .
3. There may be colour change .
4 . A precipitate may be formed
5.Heat may be given off or absorbed .
6. Sound may be produced .
7. Some chemical reactions produce electric current .

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