Question

The molecular velocities of two gases at same temperature are u₁ and u₂ , their masses are m₁ and m₂ respectively. Which of the following expression is correct?

(a)  m₁ /u₁² = m₂ /u₂²

(b)  m₁ u₁ =m₂ u₂

(c)  m₁ /u₁ = m₂ /u₂ 

(d)  m₁ u₁ ² = m₂ u₂²

Answer 1

Correct option  (d)  m₁ u₁ ² = m₂ u₂²

Explanation:

u = (3RT/m)^1/2 or mu² = 3RT at same temperature

m₁ u₁² < m₂u₂ ²