Question

different between chemical and physical change​

Answer 1

Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Explanation:

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Answer 2

Chemical change

1. A chemical reaction is in which a new substance is formed by heating, melting, mixing, moulding,etc.
2. These changes cannot be reversed.
3. In this the chemical properties of the substance changes.
4. Example; Cooking of food, Burning of paper, etc.

Physical Change

1. A physical change is in which the physical appearance of the same substance changes.
2. These changes can be reversed.
3. In this, the physical properties of the substance changes.

    4. Example; Melting of ice, stretching of rubber band, etc.

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