| In three beakers labelled as [A], [B] and [C], 100 mL of water, 100 mL of 1 M solution of glucose in water and 100 mL of 0.5 M solution of glucose in water are taken respectively and kept at same temperature. Which of the following statements is correct? |
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A) Vapour pressure in all the three beakers is same.
B) Vapour pressure of beaker B is highest.
C) Vapour pressure of beaker C is highest.
D) Vapour pressure of beaker B is lower than that of C and vapour pressure of beaker C is lower than that of A.
Correct Answer: D
Solution :
Vapour pressure of a solution containing non- volatile solute is less than that of the pure solvent. The decrease in vapour pressure depends upon the quantity of non-volatile solute present in it. Hence, vapour pressure of A > C > B.
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