Which of the gases diffuses faster among `N_2,O_2` and `CH_4`? Why?

Why do gases diffuse faster than solids or liquids ?

The ratio of the rates of diffusion of SO_(2), O_(2) and CH_(4) is :

Which of the gases among O_(2),CO_(2) and SO_(2) under similar condition diffuses slower than NO_(2) gas?

The ratio of rates of diffusion of SO_(2) , O_(2) and CH_(4) is

The ratio of rates of diffusion of SO_(2) , O_(2) and CH_(4) is

Which of the following has the highest rate of diffusion O_2 , CO_2 , NH_3 , N_2

Out of gases and liquids, which diffuse faster ?

Which will diffuse faster, ammonia of CO_(2) ? What are their relative rates of diffusion?