how will you prove that air support burning
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Cover the burning candle with a glass jar. After few minutes the candle is extinguished. As the supply of air is stopped due to glass jar the burning of candle is also stopped. This experiment proves that air supports burning.
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You will find that the candle blows out after burning for some time, and the water level inside the inverted glass rises to some extent. The component oxygen of air inside the glass is used up in burning. Therefore, water occupies that space. This shows that air supports burning.
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