write an activity to show that air is necessary for combustion
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2. you can also see that when some person's dress catch fire we cover a blanket to the person for not getting the air to contact with air/oxygen , from this activity also we can see that air is necessary for combustion.
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Aim:
To show that oxygen (air) is necessary for combustion.
Materials Required:
Two candles, a match box and a glass jar. Theory Combustion is a chemical reaction in which a combustible substance burns in air (oxygen) to produce Carbon dioxide , water and heat.
Combustible substance (Fuel) + 0,— CO, + Water + Heat
Procedure:
(i) Light two candles and fix them on the table.
(ii) Cover one of the candles by an inverted glass jar.
Observations:
Candle covered by glass jar extinguishes due to the absence of air while the other candle keeps on burning because it is getting regular supply of oxygen (air). Conclusion Oxygen (air) is necessary for the combustion process.
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