Two beakers of capacity 500 mL were taken. One of these beakers, labelled as "A", was filled with 400 mL water whereas the beaker labelled "B" was filled with 400 mL of 2 m solution of NaCI. At the same temperature, both the beakers were placed in closed containers of same material and same capacity as shown in Fig. At a given temperature, which of the following staements is correct about the vapor pressure of pure water and that of NaCI solution ?

Options

A. Vapour pressure in beaker (A) is more than that in beaker (B).
B. Vapour pressure in beaker (A) is less than that in beaker (B).
C. Vapour pressure is equal in both the beakers.
D. vapour presure in beaker (B) is twice the vapour pressure in beaker (A).

Answer

a

Explanation

is the correct answer. The vapour pressure on the surface of pure solvent is always higher as compeared to the vapour pressure on the surface of the solution.