Question

Which of the following is not a postulate of kinetic theory of matter?

• A. All gases at a given temperature have the same average kinetic energy.
• B. Lighter gas molecules move faster than heavier molecules.
• C. The kinetic energy of a gas is a measure of its Kelvin temperature.
• D. All of the above

Answer 1

The correct option is D All of the above

All the above statements are postulates of kinetic theory of matter. The kinetic energy of a gas is a measure of its Kelvin temperature. Individual gas molecules have different speeds, but the temperature and kinetic energy of the gas refer to the average of these speeds. All gases at a given temperature have the same average kinetic energy. Lighter gas molecules move faster than heavier molecules.