Question

2. Differentiate between physical and chemical changes​

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.

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Answer 2

physical change: A change which cannot new substances is formed.

for example: cutting the wood,cutting the paper, melting wax

chemical change:A change which can new substances is formed.

for example: burning the wood,burning the paper,milk change in curd