LiquidsHydrogen Bonding and Volume Contraction61Choose the best answerWhen 50 mL ethanol is mixed with 50 mL water, the final volume may be less than 100 mL mainly because of:AVapour pressureBHydrogen bondingCBoilingDChemical reaction Like 0 Discuss 0Share
LiquidsAnomalous Behaviour of Water62Choose the best answerWater shows anomalous expansion when cooled from:A100°C to 0°CB4°C to 0°CC10°C to 4°CD0°C to −10°C Like 0 Discuss 0Share
LiquidsBoiling and Latent Heat of Vaporization63Choose 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 Point64Choose 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 0 Discuss 0Share
LiquidsSurface Tension65Choose the best answerWhich liquid has the highest surface tension among the following?AHexaneBMercuryCWaterDEthanol Like 0 Discuss 0Share