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Q.

The vapour density of a mixture containing NO2 and N2O4 is 27.6. The mole fraction of N2O4 in the mixture is:

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a

0.1

b

0.8

c

0.2

d

0.5

answer is B.

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Detailed Solution

Let 1 mole of mixture has x mole N2O4
2 x 27.6 = x (92) + (1 - x).46

 x =0.2

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