Question

Which of the following is independent of temperature for a gas?
A.Volume.
B.Rate of Diffusion.
C.Vapour Density.
D.Pressure.

Answer 1

Hint: We know that the Vapour density: The vapour phase is defined as the relative weight of vapour or gas in comparison to atmospheric air if the vapour density of any gas is higher than that of atmospheric air then it will rise above air, if vapour density of the gas is less than atmospheric air then it will be at lower level than atmospheric air.

Complete answer:
Vapour density is defined as the density of a vapour in respect of that of hydrogen. It is a relative term. It can also be defined as the mass of a certain volume of a substance divided by the mass of the same volume of hydrogen. For sound to travel, medium is required and is essential for the propagation of energy through the medium. The speed of sound is different in different mediums. The speed of sound in any media basically depends on the rapidness of the propagation of vibrational energy through the medium.
The temperature of a gas depends on volume, rates of diffusion and pressure. But vapour density is the density of a gas relative to that of hydrogen at the same temperature is known as the vapour density of the gas. Thus, vapour density is independent of temperature.

Therefore, the correct answer is Option C.

Note:
Remember that the Density and vapour density are two different aspects in order to define, density is the ratio of mass of substance to its volume whereas vapour density is defined as the ratio of the volume of a certain gas to the equal volume of hydrogen gas.