can anyone tell me that what is the difference between Physical and chemical change.
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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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the changes that can be reverse again is called physical change and the changes that can't be reverse again is called chemical change
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