Question

Study the figures given below and answer the questions that follow.

i. Why does air enter in (ii)? ii. Why does the candle get extinguished when covered with a glass jar? iii. When the candle gets extinguished, why does the level of water rise in the inverted jar (ii)?

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Answer

i. When the glass is tilted, the air present in the glass is rapidly replaced with water.

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ii. For burning, oxygen is required. When covered, the candle does not get access to oxygen, hence it extinguishes.

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iii. When the candle extinguishes, the temperature inside the jar decreases and the temperature drops. To equalize the pressure, water enters into the jar.

 

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