Two beakers of capacity 500mL were taken. One of these beakers, labelled as “A”, was filled with 400mL water whereas the beaker labelled “B” was filled with 400mL of 2M solution of NaCl. At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in Fig. 2.2. 

At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution. 

(i) vapour pressure in container (A) is more than that in container (B). 

(ii) vapour pressure in container (A) is less than that in container (B). 

(iii) vapour pressure is equal in both the containers. 

(iv) vapour pressure in container (B) is twice the vapour pressure in container (A).