Which of the following gases will have the same rate of effusion under identical conditions ?

Which of the following pair of gases will have same rate of diffusion under similar conditions?

Which of the following pair of gases will have same rate of diffusion under similar conditions?

Which of the following pairs of gases will have identical rate of effusion under similar conditions?

Which of the following pairs of gses will have identical rate of effusion under similar conditions ?

Which of the following gases have same rate of diffusion at constant P and T ?

Which of the following gases have same rate of diffusion at constant P and T ?

Which of the following law states that equal volumes of all gases under identical conditions of temperature and pressure contain equal number of molecules?