If a burning candle is placed inside a closed glass jar, the candle gets extinguished after some time. This is caused due to the absence of ______.
A
hydrogen
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B
oxygen
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C
carbon dioxide
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D
argon
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Solution
The correct option is B oxygen Among the given options, oxygen is a supporter of combustion. When a lit candle is placed in open, it continues to burn due to the continuous supply of oxygen. When the same is placed inside a jar, it gets extinguished as the oxygen supply is cut off.