How can we ay that burning if candle is a chemical change but the glowing the bulb is physical chamge ?
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Burning of a candle is a chemical change :
when the wick is set on fire,it undergoes a chemical change that is not reversible
Glowing of bulb is physical change:
It does not alter any of the chemical characters of the bulb,once the bulb is switched off and current stops flowing,the chemical properties of Tungsten remains unaltered.
Hope that helps!
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