
The freezing point order of the solution of glucose is?
A)
B)
C)
D)
Answer
417.3k+ views
Hint: We need to know the freezing point, temperature at which a liquid becomes a solid. As with the melting point, increased pressure usually raises the freezing point. The freezing point is lower than the melting point in the case of mixtures and for certain organic compounds such as fats.
Complete answer:
We must remember that the freezing point depression where is the molal freezing point depression constant and m is the molality of the solute. Freezing point depression is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent. The freezing points of solutions are all lower than that of the pure solvent and are directly proportional to the molality of the solute.
Let’s solve the question: We can take the mass of solvent to be so solution of glucose means of glucose in of water. Similarly, solution of glucose means of glucose in of water and solution of glucose means of glucose in of water. The number of moles is directly proportional to molality, greater the number of moles, greater will be the molality therefore, solution will have the greater molality than followed by . This means that change in freezing point will be greatest for than than and than .Greater the change less will the freezing point as there is depression in freezing point on addition of solute.
Thus the correct option is B i.e. .
Note:
We have to know that ordinarily, the freezing point of water and melting point is or . The temperature may be lower if supercooling occurs or if there are impurities present in the water which could cause freezing point depression to occur.
Complete answer:
We must remember that the freezing point depression
Let’s solve the question: We can take the mass of solvent to be
Thus the correct option is B i.e.
Note:
We have to know that ordinarily, the freezing point of water and melting point is
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