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QJEEM04Ch860a: JEE Main 2004 Chemistry - Class 12 JEEM04Ch860a Solution: Which of the following liquid pairs shows a positive deviation…
Which of the following liquid pairs shows a positive deviation from Raoult’s law?
Multiple Choice Options
- A Water – hydrochloric acid
- B Acetone – chloroform
- C Water – nitric acid
- D Benzene – methanol
Step-by-Step Verified Solution
NOTE : Positive deviations are shown by such solutions in which solvent-solvent and solute-solute interactions are stronger than the solvent interactions. In such solution, the interactions among molecules becomes weaker. Therefore their escaping tendency increases which results in the increase in their partial vapour pressures.
In a solutions of benzene and methanol there exists inter molecular bonding.
In this solution benzene molecules come between ethanol molecules which weaken intermolecular forces. This results in increase in vapour pressure.
In a solutions of benzene and methanol there exists inter molecular bonding.
In this solution benzene molecules come between ethanol molecules which weaken intermolecular forces. This results in increase in vapour pressure.