A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution?

Options

A. The solution is formed in 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 shows negative deviation from Raoult's law

Answer

B

Explanation

n-heptane and ethanol forms non-ideal solution. In pure ethanol, molecules are H-bonded. On adding n-heptane, its molecules get in between the most molecules and break some of the hydrogen bonds between them due to weakening of interactions, the solution shows positive deviation from Raoult's law.