Question

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 : 02 is
3:1, the partial pressure of Nitrogen in the
sample is
(A) 480 mm.
(B) 600 mm
(C) 450 mm.
(D) 160 mm.​

Answer 1

Answer:

Explanation:

Hey there!

Here is the answer:

Correct option is  C ) 450 mm

Aqueous tension = 40mm

Pressure due to N2  and O2  = 640−40=600mm

Mole fraction of N2  =3:4

Partial pressure of N2  = Mole fraction of N2  × Total pressure

Partial pressure N2 is   3/4 ×600=450

Hence, the correct option is C

I hope it helps... :)