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Question

5.5 mg of nitrogen gas dissolves in 180 g of water at 273 K and one atm pressure due to nitrogen gas. The mole fraction of nitrogen in 180 g of water at 5 atm nitrogen pressure is approximately :

A
1×105
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B
1×104
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C
1×106
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D
1×103
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Solution

The correct option is C 1×104
According to Henry's law:

Pgas=KH.Xgas

In the above case we can write:

P1P2=X1X2

15=(5.5×103/28)(5.5×103/28)+(180/18)X2

X2=1×104

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