Question

Which of the following statement is incorrect for gases?

• A. Mass of gas cannot be determined by weighing the container in which it is enclosed.
• B. Gases do not have a definite shape and volume.
• C. The volume of a gas is equal to the volume of the container confining the gas.
• D. Confined gas exerts uniform pressure on the walls of its container in all directions.

Answer 1

Answer: (A)

Mass of gas cannot be determined by weighing the container in which it is enclosed.

The mass of a gas can be determined by weighing the container in which the gas is enclosed and again weighing the container after removing the gas. The difference between the two weights gives the mass of the gas. The mass of the gas is related to the number of moles of the gas i.e mass in gm/molar mass.