When chloroform and acetone are mixed, the resulting solution shows a negative deviation from Raoult — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Pure chloroform and acetone exhibit dipole-dipole forces. When mixed, they form a strong intermolecular hydrogen bond (A-B > A-A). This strongly binds the molecules, lowering their escaping tendency and causing a negative deviation ($\Delta H_{mix} < 0$).