LiquidsBoiling and Latent Heat of Vaporization146Choose the best answerAt constant external pressure, once a pure liquid is boiling, additional heat mainly:ARaises its boiling temperature continuouslyBConverts liquid into vapourCLowers its vapour pressureDDecreases molecular energy Like 0 Discuss 0Share
LiquidsHydrogen Bonding and Boiling Point147Choose the best answerThe anomalously high boiling points of compounds such as H₂O, HF and NH₃ are mainly due to:AMolecular massBHydrogen bondingCDensityDNumber of hydrogen atoms Like 1 Discuss 0Share
LiquidsSurface Tension148Choose the best answerWhich liquid has the highest surface tension among the following?AHexaneBMercuryCWaterDEthanol Like 0 Discuss 0Share
LiquidsDistribution of Molecular Energies149Choose the best answerThe molecular energies in a liquid are:ANot equally distributedBMinimum for all molecules at the bottomCMaximum for all molecules in the middleDNegligible at the surface Like 0 Discuss 0Share
LiquidsIntermolecular Forces and Evaporation150Choose the best answerIf intermolecular-force strength follows A < B < C, which substance evaporates most readily?ACBBCA and B equallyDA Like 0 Discuss 0Share