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Q.

Is it true that the relative proportion of nitrogen and oxygen by volume in air is 4:1?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
Air is a mixture of gases. It is composed of 78% nitrogen, 21% oxygen and 1% carbon dioxide along with other gases and water vapour, dust and smoke in very small quantities. So, air has approximately 80% nitrogen and 20% oxygen. Hence, the ratio of nitrogen and oxygen can be deduced to almost 4:1.
  
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Is it true that the relative proportion of nitrogen and oxygen by volume in air is 4:1?