Question

The rate of diffusion of hydrogen gas as compared to that of oxygen gas is :

• A. $\frac{1}{2}$ as fast
• B. identical
• C. twice as fast
• D. four times as fast
• E. eight times as fast

Answer 1

Answer: (D)

four times as fast

Graham's law states that the rate of effusion or of diffusion of a gas is inversely proportional to the square root of its molecular weight.

So, $R_{Hydrogen}$/$R_{Oxygen}$ $=$$(32/2{)}^{.5}$$=$$4$

So, rate of diffusion of hydrogen gas is four times faster than oxygen gas.