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Question
(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?
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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.
(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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