By bringing a burning matchstick near the mouth of both jars, presence of oxygen can be checked. The matchstick will extinguish near the jar containing nitrogen.
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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Two jars A and B are filled with two gases—nitrogen and oxygen. Both are colourless and odourless. How can you identify the jar that contains oxygen gas?
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