Gases deviate from the ideal gas behaviour because their molecules :
The correct option is B have forces of attraction between them
Option B is correct.Gases deviate from the
ideal gas behaviour because their molecules have forces of attraction
between them.
Assumptions of kinetic theory of gases :
1). The volume occupied by gas molecules is negligibly small as
compared to the volume occupied by the gas.
The first assumption is valid only at low pressures and high
temperature, when the volume occupied by the gas molecules is negligible as
compared to the total volume of the gas. But at low temperature or at high
pressure, the molecules being in compressible the volumes of molecules are no
more negligible as compared to the total volume of the gas.
2).The forces of attraction
between gas molecules are negligible.
The second assumption is not valid when the pressure is high
and temperature is low. But at high pressure or low temperature when the total
volume of gas is small, the forces of attraction become appreciable and cannot
be ignored.
Option B is correct.
Gases deviate from the ideal gas behaviour because their molecules have forces of attraction between them.
Assumptions of kinetic theory of gases :
1). The volume occupied by gas molecules is negligibly small as compared to the volume occupied by the gas.
The first assumption is valid only at low pressures and high temperature, when the volume occupied by the gas molecules is negligible as compared to the total volume of the gas. But at low temperature or at high pressure, the molecules being in compressible the volumes of molecules are no more negligible as compared to the total volume of the gas.
2).The forces of attraction between gas molecules are negligible.
The second assumption is not valid when the pressure is high and temperature is low. But at high pressure or low temperature when the total volume of gas is small, the forces of attraction become appreciable and cannot be ignored.
