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2015-06-28T09:53:23+05:30

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A physical changes are the changes in which no new substance is formed. Whereas, in the chemical changes, new substances are formed. Examples of chemical change is reaction of iron with air. 
 Example of physical change is breaking of glass.
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2015-06-28T10:16:29+05:30
Those reactions that are reversible is physical while those that dont reverse and are permanent are chemical
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