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Chemistry - Ideal Gas Question with Solution | TestHub

ChemistryIdeal GasMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

A sample of air contains only $N_{2}, O_{2}$ and $H_{2} O$ . It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of $N_{2} : O_{2}$ is 3 : 1. The partial pressure of $N_{2}$ in the sample is

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Answer:

Solution:

Pressure of dry air $= P_{m o i s t a i r} - P_{w a t e r v a p o u r s}$

Partial pressure = mole fraction $\times P_{T}$

$∴$ Partial pressure of $N_{2}$ and $O_{2}$ are also in the ratio of 3 : 1.

Partial pressure of $N_{2} = \frac{600 \times 3}{3 + 1} = 450 t o r r$ .

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Ideal GasSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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