A. a dynamic equilibrium exists between liquid molecules and the vapour molecules
B. a dynamic equilibrium exists such that more molecules return to the liquid than are living it
C. the temperature of the vapour varies
D. the vapour pressure is atmospheric
Correct Answer:
Option A – a dynamic equilibrium exists between liquid molecules and the vapour molecules
Explanation
A saturated vapour is one which is in dynamic equilibrium with its own liquid; that is as many go from the liquid to the vapour state every second return back to liquid.
