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Q.

In a mixture of N2 and CO2 gases, the partial pressure of CO2  is 1.25 atm. The total pressure of the mixture is 5atm. The mole fraction of N2 in the mixture is

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a

0.80

b

0.82

c

0.75

d

0.65

answer is B.

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Detailed Solution

PN2=XN2P

PN2=P−PO2

        =5−1.25

        =3.75

3.75=XN2×5⇒XN2=3.755=0.75

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