Is changing of colour of hack saw blade is physical or chemical change
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it is a chemical change
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Answer:
physical change
Explanation: it's a physical change. since only the physical properties like the color changed and after we removed the blade from the flame it got back its original color and we know that in physical change only the physical PROPERTIES LIKE SAHPE,SHPAPE,SIE AND COLOUR CHANGE AND THEY ARE GENERALLY REVERSIBLE
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