A container has two chambers of volumes V₁ = 2 litres and V₂ = 3 litres separated by a partition made of a thermal insulator. The chambers contain n₁ = 5 moles and n₂ = 4 moles of ideal gas at pressures p₁ = 1 atm and p₂ = 2 atm, respectively. When the partition is removed, the mixture attains an equilibrium pressure of:

Question

Question

This question was previously asked in

NEET 2025 Official Paper (Held On: 04 May, 2025)

Answer 1

Correct option is: (2) 1.6 atm

Before partition

after partition removed

P₁V₁ + P₂V₂ = P(V₁ + V₂)

⇒ 1 × 2 + 2 × 3 = P × (2 + 3)

⇒ 8 / 5 = P

⇒ P = 1.6 atm