Two beakers of capacity $$500$$ mL were taken. One of these beakers, labelled as A, was filled with $$400$$ mL water, whereas the other beaker is labelled as 'B' was filled with $$400$$ mL of $$2$$ M solution of NaCl.At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure. At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution?

Question

Two beakers of capacity $$500$$ mL were taken. One of these beakers, labelled as A, was filled with $$400$$ mL water, whereas the other beaker is labelled as 'B' was filled with $$400$$ mL of $$2$$ M solution of NaCl.At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure. At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution?

Infinity Learn · Accepted Answer

When salt is added to water to make the solution, the vapour pressure of solution decreases. This is due to decrease in surface covered by solvent molecules which lead to decrease in number of solvent molecules escaping from the surface corresponding to pure solvent.  Hence, vapour pressure also gets reduced.

Q.

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