Q. 185.0( 3 Votes )

With the help of an experiment, show that air is necessary for burning of a candle.

Answer :

An experiment to show that air is necessary for burning of a candle is as follows: -

i. At first, light a candle on a table.


ii. A glass chimney is then put over the candle which is being rested on a few wooden blocks in such a way that air can enter the chimney from the bottom.


iii. It will be seen that in this case, the candle burns freely in this case.


iv. In the second set, we had removed the woods and had allowed the chimney to rest on the table.


v. In this case, the flame of the candle flickers and produces smoke.


vi. In the third arrangement, we had put a glass plate over the chimney of the second arrangement above.


vii. In this case, the flame finally goes off.



From the above three experimental setups we can see that the candle burns freely when there was a continuous supply of air as in the first case. The candle started flickering when we had stopped the air supply from the bottom as in the second case. Finally in the third case when we had removed the supply of air from both the bottom and above the candle goes off.


The above observations clearly suggest that air is necessary for the burning of a candle.


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