Question

2. How will you identify a physical change in a substance? answers​

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.

Answer 2

Physical changes are those changes in which only the forms of substances get modified; the chemical natures and compositions of the substances involved are not altered.

Characteristics:

• ⋅ No new substance is formed during a physical change.
• ⋅ Most physical changes can be reversed easily.
• ⋅ The chemical composition of a substance undergoing physical change remains the same.

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