A mixture of N 2 and O 2 gases is kept in a closed vessel at constant temperature. If the partial pressure of N 2 is twice that of O 2 and total pressure is 3 atm, what is the partial pressure of O 2 ?

🧪 Chemistry · States of Matter · NEET & JEE

A mixture of N₂ and O₂ gases is kept in a closed vessel at constant temperature. If the partial pressure of N₂ is twice that of O₂ and total pressure is 3 atm, what is the partial pressure of O₂?

Answer: 1 atm.

A 1 atm
B 1.5 atm
C 2 atm
D 0.5 atm

Correct answer: A. 1 atm

Explanation: Let O₂ partial pressure = x, then N₂ = 2x; total = 3x = 3 atm, so x = 1 atm.

Graph of pressure versus volume for a fixed amount of gas at constant temperature: the curve falls steeply then flattens, a hyperbola showing pressure inversely proportional to volume.

Boyle's law: at constant temperature the pressure of a fixed mass of gas is inversely proportional to its volume (P ∝ 1/V), so the P–V plot is a hyperbola — halving the volume doubles the pressure. Image: Reginaprice2013, CC BY-SA 3.0, via Wikimedia Commons.

Concept context

Discover why gases expand to fill any container while liquids flow and solids hold their shape. Master the gas laws, the ideal gas equation, and the reasons real gases deviate from ideal behavior.

Read the full States of Matter notes →

A mixture of N2 and O2 gases is kept in a closed vessel at constant temperature. If the partial pressure of N2 is twice that of O2 and total pressure is 3 atm, what is the partial pressure of O2?

Concept context

More States of Matter questions

A mixture of N₂ and O₂ gases is kept in a closed vessel at constant temperature. If the partial pressure of N₂ is twice that of O₂ and total pressure is 3 atm, what is the partial pressure of O₂?