Two glass jars A and B ajre filled with carbon dioxide
Question:

Two glass jars A and B ajre 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?

Solution:

In jar B, the candle remains lighted for a longer 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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