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2014-11-09T19:05:56+05:30

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Physical change means  there should be some change in the physical property - like color, size, reflectivity,  refractive index, strength, shape,  odour, spectrum, etc.

Suppose we tear a paper, the chemical composition remains the same.  But physically the shape of the object is altered.   Breaking of glass.  You cannot stick it to form to original shape.

Breaking of a rubber band when the force applied is beyond the breaking stress.

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