Yes, it is possible.
The gas will condense and turn into a liquid.
Pressure can affect the solubility but the effect is not important.
decreased heat, increased pressure
A gas is most likely to change to the liquid phase when the pressure on the gas is increased. This is because the same number of molecules will have less space to occupy.
the air will be in liquid state when its pressure is increased and its temparature is decreased. eg: CNG is highly compressible gas.
If the temperature is increased high enough to increase the value pressure of the liquid to that of the atmospheric pressure, the liquid will boil and vaporize to become a gas.
Gas is in its state for either or both of two reasons, both leading to the same effect. Either the temperature of the substance is too great to remain at a liquid state, or there is insufficient pressure to keep the molecules together enough to remain a liquid. Both reasons will cause the molecules to spread out, eventually turning into a gas. For a gas to turn into a liquid, either the pressure the substance is under would have to be increased or the temperature decreased, causing the molecules to be pressed together enough to return to its liquid form.
You call this process evaporation. When liquid turns into gas due to heat and pressure, evaporation is occurring.
It depends what you mean. A gas turn into a liquid if heat is taken away, pressure is applied, or the volume of the container the gas is decreases.
This process is called condensation and occur at low temerature or high pressure.
This change of phase is called vaporization.
Not all because air is a gas and it does not turn into a liquid