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15. Air Around Us
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Q6 of 20 Page 89

Which of the following components of air is present in the largest amount in the atmosphere?

The air is the mixture nitrogen, oxygen, carbon dioxide, water vapour and smoke. Nitrogen is the component of air which is present in the largest amount in the atmosphere. It occupies 78% of the atmosphere.

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Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.

(i) Bubbles of air came out from the bottle.


(ii) Some water entered the bottle.


(iii) Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.


(iv) No bubbles formed, only water entered the bottle. Which observations is/are correct?

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15. Air Around Us
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