ChemistryHow will you prove that air supports burning?

How will you prove that air supports burning?

  1. A

    Burn a candle in a vacuum and observe that it goes out.

  2. B

    Burn a candle and observe that the flame is yellow.

  3. C

    Burn a candle under a glass jar and observe that it goes out.

  4. D

     Burn a candle and observe that the flame is blue.

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    Solution:

    Burn a candle under a glass jar and observe that it goes out. This is because air is necessary for burning to occur. When a candle is burned under a glass jar, the oxygen in the air inside the jar is gradually used up by the flame. Once the oxygen is gone, the flame will go out, proving that air is necessary to support combustion.

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