How is a chemical change different from a physical change?
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Physical changes only change the appearance of a substance not its chemical composition .
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Physical Change: a change in which the molecules are rearranged while their actual composition remains same and in this In physical change, no new substance is formed.
Ex:- change are freezing of water,boiling of water, crushing paper and bringing back to shape etc......
Chemical Change: a change in which the molecular composition of a substance completely changes and a new substance is formed and A chemical change is always accompanied by one or more new substances or substance.
Ex:- digestion of food, burning of coal, rusting,cooking of raw vegetables etc....
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