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On the basis of information given below ...

On the basis of information given below mark the correct option.
Information : On adding acetone to methanol some of the hydrogen bonds between methanol molecules breaks.

A

At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult's law

B

At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show positive deviation from Raoult's law

C

At specific composition methanol-acetone mixture will form minimum boiling azeotrope and will show negitive deviation from Raoult's law

D

At specific composition methanol-acetone mixture will form maximum boiling azeotrope and will show negitive deviation from Raoult's law

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AI Generated Solution

The correct Answer is:
To solve the question, we need to understand the behavior of the solution formed by mixing acetone and methanol in terms of Raoult's law and the types of deviations it can exhibit. ### Step-by-Step Solution: 1. **Understanding the Components**: - Methanol (CH₃OH) is a polar molecule that forms hydrogen bonds with other methanol molecules. - Acetone (C₃H₆O) is also a polar molecule but primarily exhibits dipole-dipole interactions. **Hint**: Identify the types of interactions present in each component. 2. **Initial State of Methanol**: - In pure methanol, the molecules are held together by strong hydrogen bonds, which restrict their movement and escape into the vapor phase. **Hint**: Consider how strong intermolecular forces affect vapor pressure. 3. **Adding Acetone**: - When acetone is added to methanol, it disrupts the hydrogen bonding between methanol molecules. Acetone molecules fit between methanol molecules, breaking some of the hydrogen bonds. **Hint**: Think about how the addition of a solute can affect the existing intermolecular forces. 4. **Effect on Vapor Pressure**: - The breaking of hydrogen bonds allows methanol molecules to escape more easily into the vapor phase. This results in an increase in the vapor pressure of the solution compared to what would be expected if Raoult's law were followed. **Hint**: Relate the increase in vapor pressure to the concept of deviations from Raoult's law. 5. **Determining the Type of Deviation**: - According to Raoult's law, if the vapor pressure of the solution is higher than expected, it indicates a positive deviation. In this case, since the vapor pressure increases due to the disruption of hydrogen bonds, we conclude that the solution exhibits positive deviation from Raoult's law. **Hint**: Recall the definitions of positive and negative deviations from Raoult's law. 6. **Conclusion**: - Therefore, the correct option is that the solution formed by mixing acetone and methanol shows positive deviation from Raoult's law and will form a minimum boiling azeotrope. **Hint**: Summarize the findings to confirm the final answer. ### Final Answer: The solution formed by mixing acetone and methanol shows positive deviation from Raoult's law.
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