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Q.

Air contains O2 and N2 in the ratio 0.2 : 0.8. If Henry law constant for O2 and N2 are 3.3 × 107  torr and 6.6 × 107 torr respectively, then the ratio of mole fractions of O2 to N2 dissolved in water at 1 bar pressure is

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a

2 :1

b

1 : 3

c

1 : 2

d

1 : 1

answer is C.

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Detailed Solution

From Henry's law, PO2PN2=KH(O2)XO2KH(N2)XN2 XO2XN2=0.20.8×6.6×1073.3×107=12

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Air contains O2 and N2 in the ratio 0.2 : 0.8. If Henry law constant for O2 and N2 are 3.3 × 107  torr and 6.6 × 107 torr respectively, then the ratio of mole fractions of O2 to N2 dissolved in water at 1 bar pressure is