List of top Chemistry Questions on Colligative Properties asked in KEAM

The compound which has the highest freezing point (in K) is

The vapour pressure of pure benzene at a certain temperature is 0.85 bar. When 0.5 g of a non-volatile solute is added to 39 g of benzene, the vapour pressure becomes 0.845 bar. What is the molar mass of the substance? ________.