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Q.

A sample of air contains Nitrogen, Oxygen and saturated with water vapour under a total pressure of 640 mm. If the vapour pressure of water at that temperature is 40 mm and the molecular ratio of N2 : O2 is 3 : 1, the partial pressure of Nitrogen in the sample is

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a

600 mm

b

160 mm

c

480 mm

d

450 mm

answer is C.

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Detailed Solution

Vapour pressure of O2+N2=600mm640-40 ratio=3:1 PN2=34×600=450mm 

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