What do you observe when
A burning candle is covered with an inverted jar.

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Solution

1. You will notice that the candle continues to burn for some time and then gets extinguished. active air i.e Oxygen( $O_{2}$ ) which helps the candle to burn.
2. When it is used up candle stops burning. the air still present in the jar is inactive. the fire becomes extinguished because ${CO}_{2}$ is produced as a result of burning.

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What do you observe when A burning candle is covered with an inverted jar.

What do you observe when
A burning candle is covered with an inverted jar.