Question

A mixture of hydrogen and oxygen in 3 : 1 volume ratio is allowed to diffuse through a porous partition .What should be the composition of the initial gas diffusing out the vessel ?

• A. 2 : 1
• B. 4 : 1
• C. 8 : 1
• D. 12 : 1

Answer 1

The correct option is D 12 : 1

As rate of diffusion of a gas is inversely proportional to the square root of the molar mass of the gas, hydrogen gas will diffuse 12 times faster than the oxygen gas.

$\frac{r_{H_2}}{r_{O_2}}=\frac{3}{1}\sqrt{\frac{32}{2}}=\frac{12}{1}$