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Question

If you fix a burning candle on a petri dish, it will continue to burn, but when you put an inverted beaker over it, the flame goes off. Why does this happen?
The supply of oxygen is cut off.
Insufficient nitrogen in the air.
Both A and B
None of the above

A

Both A and B

B

Insufficient nitrogen in the air.

C

The supply of oxygen is cut off.

D

None of the above

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Solution

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The correct option is B The supply of oxygen is cut off.
If you fix a burning candle on a petri dish, it will continue to burn, but when you put an inverted beaker over it, the flame goes off because the supply of oxygen is cut off. The burning candle uses all the oxygen present inside of the beaker and without oxygen combustion cannot take place.
So, option B is correct.

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