The densities of two gases are in the ratio of `1 : 16`. The ratio of their rates of diffusion is

Under the same conditions the rates of diffusion of two gases are in the ratio 1:4. The ratio of their vapour densities is

The rate of diffusion of two gases X and Y is in the ration of 1:5 and that of Y and Z in the ratio of 1:6 . The ratio of the rate of diffusion of Z with respecte to X is :

The rate of diffusion of two gases X and Y is in the ration of 1:5 and that of Y and Z in the ratio of 1:6 . The ratio of the rate of diffusion of Z with respecte to X is :

The densities of two monoatomic gases are in the ratio of 16:9. The velocities of sound in gases having the same pressure will be in the ratio of

The vapour densities of two gases are in the ratio of 1 : 3 . Their molecular masses are in the ratio of : -

The vapour densities of two gases are in the ratio of 1 : 3 . Their molecular masses are in the ratio of : -

If the densities of methane and oxygen are in the ratio 1 : 2 , the ratio of rate diffusion of O_(2) and CH_(4) is respectively

If the densities of methane and oxygen are in the ratio 1 : 2 , the ration of rate diffusion of O_(2) and CH_(4) is respectively