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CBSE - IX - Chemistry - Is Matter Around Us Pure?

how does mass of a substance alter in a physical change ?

Asked by 25th July 2012, 7:19 PM
Answered by Expert


A physical change can affect the size, shape or color of a substance but does not affect its composition or mass. The substances may be changed to another phase (i.e. gas, liquid, solid) or separated or combined.


when ice melts
when sulfur is mixed with iron filings. 
breaking a glass 
dissolving sugar in water

Answered by Expert 26th July 2012, 7:37 PM

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