(a) What is combustion?

(b) Two glass jars A and B are filled with carbon dioxide and oxygen gases respectively. In each jar, a lighted candle is placed simultaneously. In which jar, will the candle remain lighted for a longer time and why?

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Solution

(a) A chemical process in which a substance reacts with the oxygen (of air) to give off heat and light is called combustion.

(b) In jar B, the candle remains lighted for a long time because oxygen is a supporter of combustion. So, we can say that oxygen (air) is necessary for combustion to take place.

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(a) What is combustion?

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Two glass jars A and B are filled with carbon dioxide and oxygen gases, respectively. In each jar, a lighted candle is placed simultaneously. In which jar will the candle remain lighted for a longer time and why?

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(a) What is combustion? (b) Two glass jars A and B are filled with carbon dioxide and oxygen gases respectively. In each jar, a lighted candle is placed simultaneously. In which jar, will the candle remain lighted for a longer time and why?

(a) What is combustion?

(b) Two glass jars A and B are filled with carbon dioxide and oxygen gases respectively. In each jar, a lighted candle is placed simultaneously. In which jar, will the candle remain lighted for a longer time and why?