show by an activity that oxygen is nesscery for combustion.
Answers
Answer:
Take a candle and fix it on a table. The candle is lighted. The candle will continue to burn due to continuously available fresh air providing the required oxygen for combustion
Explanation:
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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.