14. Which one of the following statements is wrong for gases (a) Gases do not have a definite shape and volume (b) Volume of the gas is equal to the volume of the container confining the gas (c) Confined gas exerts uniform pressure on the walls of its container in all directions (d) Mass of the gas cannot be determined by weighing a container in which it is enclosed
Mass of the gas = mass of the cylinder including gas - mass of empty cylinder. So mass of a gas can be determined by weighing the container in which it is enclosed. Thus, the statement (d) is wrong for gases.