JEE Main 2004 — Solutions Question with Solution
From: AIEEE 2004
Question
Which of the following liquid pairs shows a positive deviation from Raoult’s law?
Choose an option
Show full solutionCorrect option: D
Correct answer
DBenzene – methanol
Step-by-step explanation
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.
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This is a previous-year question from JEE Main 2004, covering the Solutions chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.