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Standard XIII

Chemistry

Dalton's Law of Partial Pressures

A sample of a...

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 $N_{2} : O_{2}$ is 3 : 1. Find the partial pressure of nitrogen in the sample.

480 mm

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600 mm

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450 mm

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160 mm

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Solution

The correct option is C
450 mm

Vapour pressure of ( $O_{2} + N_{2}$ ) = 600 mm

Ratio = 3:1

Partial pressure of $N_{2} = \frac{3}{4} \times 600 = 450 m m$

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Similar questions

Q. A sample of air contains nitrogen, oxygen and saturated with water vapour under a total pressure of

640

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, the partial pressure of nitrogen in the sample is:

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 $N_{2} : O_{2}$ is 3 : 1. Find the partial pressure of nitrogen in the sample.

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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. Find the partial pressure of nitrogen in the sample.

The correct option is C 450 mm Vapour pressure of (O2+N2) = 600 mm Ratio = 3:1 Partial pressure of N2=34×600=450 mm

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 $N_{2} : O_{2}$ is 3 : 1. Find the partial pressure of nitrogen in the sample.

The correct option is C
450 mm

Vapour pressure of ( $O_{2} + N_{2}$ ) = 600 mm

Ratio = 3:1

Partial pressure of $N_{2} = \frac{3}{4} \times 600 = 450 m m$