Q. A binary liquid solution ois prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution?
A) The solution formed is an ideal solution
B) The solution is non-ideal, showing positive deviation from Raoult’s law
C) The solution is non-ideal, showing negative deviation from Raoult’s law
D) n-heptane shows positive deviation while ethanol show negative deviation from Raoult’s law
Explanation
(b)
n-heptane and ethanol forms non-ideal solution. In pure ethanol, Molecules are hydrogen bonded. On adding n-heptane, its molecules get in between the host molecules and break sme of the hydrogen bonds between them. Due to weaking of interactions, the solution shows positive deviation from Raoult’s law.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.