Question

difference between physical and chemical changes​

Answer 1

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In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water, etc.

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Answer 2

Property such as shape size colour or state of a substance are called its physical properties a change in which a substance undergoes a change in its physical properties it is called a physical change
And
A change in which one or more new substances are formed is called a chemical change
A chemical change is also called a chemical reaction
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