how can we say that burning of candle is a chemical change but the glowing of bulb is a physical change
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Explanation:
Burning of candle involves both types of changes physical as well as chemical. In this process the solid wax changes into liquid wax i.e. the state of a substance changes, hence it is a physical change
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Explanation:
Also, during burning of candle new substances like carbon dioxide gas and water vapour are produced, hence it is a chemical change as well. Glowing of an electric bulb is a physical change since no new substance with different properties is formed.
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