how can we say that burning of candle is a chemical change but glowing of bulb is a physical change
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because burning text when Chemicals are mixed together but growing of the bulb inside it is not a chemical change
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Burning of candle involve use of oxygen from air and its transformation into carbon dioxide which is released in air. Whereas, glowing bulb shows change in phenomenon of light.The bulb does not cause chemical reactions to take place in it, it just causes it to glow by increase in its temperature and by increase in temperature of tungsten coil in it.
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