A. a dynamic equilibrium exists between liquid molecules and the vapour molecules B. a dynamic aquilibrium 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: A
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.
