The correct options are
C As the temperature is reduced, the volume as well as pressure decreased
D A point is reached where theoretically, the volume as well as the pressure become zero
From the given graphs, the following conclusions can be drawn. (C) As the temperature is reduced, the volume, as well as pressure, decreased
(D) A point is reached where theoretically, the volume, as well as the pressure, become zero. This temperature is absolute zero at which no substance exists in the gaseous state. At this temperature, the volume, pressure, kinetic energy and heat content of the gas is zero.
Hence, the correct options are C and D