how burning of candle is chemical change
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Because the candle loses it's structure and change it's state from solid to liquid....
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When paraffin wax is melted, its component hydrocarbon molecules remain unaltered. One piece of evidence is that, if we allow the candle wax to return to room temperature, it is restored to its original solid form. Moreover, the weight of the wax is the same as when we started. Melting is therefore a physical change. In contrast, when we burn paraffin, the hydrocarbon molecules are converted to different compounds, namely carbon dioxide and water vapor. This is a chemical change.
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