At 75◦, the vapor pressure of water, methanol,diethylether and benzene are 289, 1126, 2680,and 644 torr, respectively. Which of these isNOT above its boiling point at normal atmo-spheric pressure?1.methanol and diethylether2.None of these3.water and benzenecorrect4.methanol, diethylether, and benzene5.waterMethanol and diethylether are well above 760torr at this temperature which means they areabovetheir normal boiling points.01310.0 pointsEach of the following samples was placed in 1liter of water.I) 0.6 mol NaOHII) 0.7 mol KClIII) 0.5 mol Na2NO3IV) 1 mol of sugarRank the solutions that are made in termsof increasing order of boiling point elevation.(Remember your solubility rules.)1.IV, I, II, IIIcorrect2.IV, II, I, III3.III, I, IV, II4.II, IV, I, III5.III, I, II, IVExplanation:Colligative properties of a solution dependon the number of solute particles in solution,not the type.I) will have 1.2 mol of particles becauseNaOH completely dissociates in water.II) will have 1.4 mol of particles becauseKCl completely dissociates in water.III) will have 1.5 mol of particles becauseNa2CO3completely dissociates in water.IV) will have 1 mol of sugar in solutionbecause it is soluble but does not dissociate.The higher the concentration, the greaterthe boiling point elevation, so01410.0 pointsPolyacrylamide is a water-soluble polymerwhose aqueous solution containing 25 g/L de-velops an osmotic pressure of 0.54 torr at25◦C. Find the approximate molecular weightof the polymer sample.