LiquidsEvaporation36Choose the best answerEvaporation involves:AAbsorption of heatBNo energy changeCRelease of heatDFormation of ionic bonds Like 0 Discuss 0Share
LiquidsPressure Cooker and Boiling Point37Choose the best answerIn a pressure cooker, water boils at a temperature:ABelow 100°CBExactly 100°CCAbove 100°CDAlways below 0°C Like 0 Discuss 0Share
LiquidsLiquid–Vapour Equilibrium38Choose the best answerAt the boiling point, the liquid and its vapour in equilibrium have the same:AAverage kinetic energyBPotential energyCMolecular separationDIntermolecular-force strength Like 0 Discuss 0Share
LiquidsVapour Pressure39Choose the best answerWhich statement is incorrect?AEvaporation can occur spontaneouslyBEvaporation is a surface phenomenonCVapour pressure decreases as temperature increasesDA non-volatile solute can lower the vapour pressure of a solvent Like 0 Discuss 0Share
LiquidsHydrogen Bonding and Boiling Point40Choose the best answerThe unusually high boiling point of water is mainly due to:AMolecular mass onlyBHydrogen bondingCDensityDNumber of hydrogen atoms only Like 0 Discuss 0Share