TS EAMCET Engineering 14 May 2023 Shift 1 Solved Paper

At 50∘C, the vapour pressure of pure benzene is 268 torr. The number of moles of non-volatile solute per mole of benzene required to prepare a solution having a vapour pressure of 167 torr at the same temperature is
(molar mass of benzene =78gmol−1 )