Chemistry Gaseous State ( Not In Syllabus ) Ideal Gas Equation and Related Gas laws Single Correct MCQ
Published on: August 14, 2026

A 100 ml vessel containing O 2 (g) at 1.0 atm and 400 K is connected to a 300 ml vessel containing NO(g) at 1.5 atm and 400 K by means of a narrow tube of negligible volume where gases react to form NO 2 . Final pressure of mixture will be –

A
1.125 atm
B
0.125 atm
C
1 atm
D
1.5 atm

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Text Solution

Verified by Experts
The correct answer is:
A

In combined system volume of all gases is 400 ml

Before any reaction occurs

partial pressure of O 2 = = 0.25 atm

partial pressure of NO = 1.5 × = 1.125 atm

2NO(g) + O 2 (g) ⎯→ 2NO 2 (g)

initial p 1.125 0.25 –

final p 0.625 – 0.5

P T = 0.625 +0.5 = 1.125 atm

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