Light a candle . Hold a glass tube with a pair of tongs and introduce it's one end in the dark zone of non flickering candle flame. Bring a lighted matchstick near the other end of glass tube. You see a flame. what is it that produces a flame?
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Vaporisable substances during burning, give flames. This is the molten wax rise through the wick and are vaporised during burning and they form flame. Nonvaporisable substance like charcoal does not give flame.
Explanation:
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