Question

As the temperature goes down, most gases go through what phase transitions?

Answer 1

Gas to liquid = condensation
Liquid to solid = freezing

Less likely:
Gas to solid = deposition

Hope I could help :)

Answer 2

as the temperature goes down most gases first condenses into liquid. if the temperature is further lowered down , the liquid freezes into solid state. so condensation and freezing are the two process most gases went through as their temperature is lowered down. so first gas turns into liquid and from liquid into the solid.