In three beakers labeled 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?
In three beakers labeled 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?
Vapour pressure in all the three beakers is same
Vapour pressure of beaker B is highest
Vapour pressure of beaker C is highest
Vapour pressure of beaker B is lower than that of C and vapour pressure of beaker C is lower than that of A .
The Correct Option is D
Solution and Explanation
The vapour pressure of beaker B is lower than that of the beaker c, the vapour pressure of c is lower than that of beaker A.
The concept that is applied is Raoult’s law. The vapour pressure is directly proportional to the mole fraction. Beaker A has a non volatile solute hence pressure will be the highest. Beaker B has 1 M of glucose. Due to glucose the vapour pressure will be lower than the pure water. Therefore, lower than beaker A. Beaker C has 0.5M solution, the concentration of glucose is lower than beaker B therefore the sequence will be A> C> B
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