Question

what is Physical change & chemical change , answer me quick​

Answer 1

Key Points. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.3

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Answer 2

Explanation:

Those changes in which no new substance is formed is known as physical change , they are generally reversible.ex- boiling of water , tearing of paper

Those changes in which new substance is formed is known as chemical changes, they they are generally irreversible. example example burning of candle.