Mole fraction of nitrogen in air is

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0.14

0.28

0.78

0.5

answer is D.

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Detailed Solution

The ratio of the number of molecules of a specific component in a mixture to the total number of moles in the given mixture is represented by Mole Fraction.

Mole fraction of air is 1. As the percentage of N₂ in air is 78%, therefore the mole fraction of N₂ is 0.78.

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