Chemistry - Ideal Gas Question with Solution | TestHub
ChemistryIdeal GasKinetic Theory of GasesMedium2 minQB
ChemistryMediumstatement
Statement 1: A rigid vessel contains 2 mol He at 300 mm pressure; on injecting 1 mol Ar at the same temperature, the total pressure becomes 450 mm.
Statement 2: The average kinetic energy of gas molecules depends only on the absolute temperature.
Options:
Answer:
B
Solution:
At the same V and T, partial pressure is proportional to moles: 2 mol He 300 mm, so 1 mol Ar adds 150 mm; total = 300 + 150 = 450 mm — Statement I is correct (Dalton's law). Statement II is also correct (KE = 3/2kT per molecule), but it says nothing about partial pressures, so it does not explain I. Ans: (b).
Stream:JEESubject:ChemistryTopic:Ideal GasSubtopic:Kinetic Theory of Gases
⏱ 2mℹ️ Source: QB
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