The normal boiling point of liquid X is less than that of Y,which is less than that of Z.Which of the following is the correct order of increasing vapor pressure of the three liquids at STP?
A)X,Y,Z
B)Z,Y,X
C)Y,X,Z
D)X,Z,Y
E)Y,Z,X

Question

Quizplus · Accepted Answer

The lower the boiling point of a liquid, the higher its vapor pressure. So, liquid X has the highest vapor pressure, followed by liquid Y and liquid Z. Therefore, the correct order of increasing vapor pressure is Z < Y < X, which corresponds to option B.

The Normal Boiling Point of Liquid X Is Less Than