Select correct staement :

Options

A. Solution has more molecular randomness than a pure solvent has, the entropy change between solution and solid is larger than the entropy change between pure solvent and solid
B. Heats of fusion of solution and solvent are similar since similar forces of intermolecular forces are involved
C. Sugar containing solution freezes at a lower temperature than pure water
D. All are correct statements

Explanation

To determine which of the statements provided is correct, let's analyze each statement step by step.

### Step 1: Analyze the First Statement
**Statement:** "Solution has more molecular randomness than a pure solvent has. The entropy change between solution and solid is larger than the entropy change between pure solvent and solid."

- **Explanation:** In a solution, there are both solvent and solute particles present, which increases the randomness (or entropy) compared to a pure solvent, which contains only solvent molecules. The entropy of a solid is the lowest among the states of matter. Therefore, the difference in entropy between a solution and a solid will be larger than the difference in entropy between a pure solvent and a solid.
- **Conclusion:** This statement is correct.

### Step 2: Analyze the Second Statement
**Statement:** "Heats of fusion of solution and solvent are similar since similar forces of intermolecular forces are involved."

- **Explanation:** In a pure solvent, the intermolecular forces are between solvent molecules only. In a solution, there are also solvent-solute interactions, but since the number of solute particles is small compared to solvent molecules, the overall intermolecular forces are still similar. Therefore, the amount of heat required for fusion (melting) will be approximately similar for both the solution and the pure solvent.
- **Conclusion:** This statement is also correct.

### Step 3: Analyze the Third Statement
**Statement:** "Sugar-containing solution reaches at a lower temperature than pure water."

- **Explanation:** When sugar (a non-volatile solute) is added to water, it disrupts the intermolecular forces between water molecules. This results in a decrease in the freezing point of the solution compared to pure water. This phenomenon is known as freezing point depression, which occurs because the presence of solute lowers the temperature at which the solution can freeze.
- **Conclusion:** This statement is correct as well.

### Final Conclusion
Since all three statements have been analyzed and found to be correct, the answer is that all statements are correct.

### Answer:
**All statements are correct.**

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