At T ( K ) , equal weights of H ₂, D ₂ , and T ₂ are present in closed vessel. The pressure exerted by this gaseous mixture is P atm. The ratio of partial pressures of T ₂, D ₂ and H ₂ is approximately (H, D and T are isotopes of hydrogen).

Step-by-step solution

Let's take the equal weights of the three isotopes as 2 g . n ₁=1 ~mol , n ₂= 1 2 ~mol , n ₃= 1 3 ~mol n _ total =1+ 1 2 + 1 3 = 11 6 x₁= 1 11 6 =0.54, x₂= 1 2 11 6 =0.27, x₃= 1 3 11 6 =0.18 From Dalton's law of partial pressures:- aligned & P_i=x_i P_ total & P₃ P₂ = x₃ P x₂ P = 0.18 0.27 and P₂ P₁ = x₂ x₁ = 0.27 0.54 & P₃: P₂: P₁=0.18: 0.27: 0.54 aligned