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 leaving it
C.
the temperature of the vapour varies
D.
the vapour pressure is atmospheric
Correct Answer: Option 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.
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