Answer :
Graham's law states that the rate of diffusion or effusion of two gases is inversely proportional to the square root of their molar masses
- If two gases be x and y
For diffusion:-
[tex]\\ \sf\longmapsto \dfrac{V_x}{V_y}=\sqrt{\dfrac{m_y}{m(x}}[/tex]
- m means molar mass
For effusion
[tex]\\ \sf\longmapsto \dfrac{R_x}{R_y}=\sqrt{\dfrac{m_y}{m_x}}[/tex]