In three beakers labeled as (A), (B) and (C), $100 m L$ of water, $100 m L$ of $1 M$ solution of glucose in water and $100 m L$ of $0.5 M$ solution of glucose in water are taken respectively and kept at same temperature.
Which of the following statements is correct?

Vapour pressure in all the three beakers is same

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Vapour pressure of beaker B is highest

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Vapour pressure of beaker C is highest

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Vapour pressure of beaker B is lower than that of C and vapour pressure of beaker C is lower than that of A

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Solution

The correct option is D Vapour pressure of beaker B is lower than that of C and vapour pressure of beaker C is lower than that of A
Liquid solution is formed when we dissolve a solid, liquid or gas in a particular liquid solvent. Vapour pressure of liquid solutions is defined as the pressure exerted by the vapours on the liquid solvent when kept in equilibrium and a certain temperature.

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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 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 figure.

At a given temperature, which of the following sttement is correct about the vapour pressure of pure water and that of $N a C^{1}$ Solution?
(a) Vapour pressure in container (A) is more than that in container (B)
(b) Vapour pressure in container (A) is less than that in container (B)
(c) Vapour pressure is equal in both the containers
(d) Vapour pressure in container (B) is twice the vapour pressure in container (A)