Under similar conditions which of the following gases will diffuse four times as quickly as oxygen ?

Under similar conditions, in which of the following gases will the speed of sound be the least ?

Which of the following gases will diffuse fastest ? Nitrogen, Oxygen, Hydrogen, Helium.

Which of the following gases will diffuse fastest ? Nitrogen, Oxygen, Hydrogen, Helium.

Under similar conditions of temperature and pressure, In which of the following gases the velocity of sound will be largest :-

Under similar conditions of temperature and pressure, in which of the following gases the velocity of sound will be largest?

Under similar conditions of temperature and pressure, In which of the following gases the velocity of sound will be largest :-

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