LiquidsHydrogen Bonding and Boiling Point111Choose the best answerWhich statement correctly compares the boiling points of H₂O and HF?AHF > H₂OBHF = H₂OCH₂O > HFDTheir boiling points cannot be compared Like 0 Discuss 0Share
LiquidsConditions Favouring Liquefaction112Choose the best answerThe best conditions for favouring the liquid state are:AHigh temperature and low pressureBHigh temperature and high pressureCLow temperature and low pressureDLow temperature and high pressure Like 0 Discuss 0Share
LiquidsHydrogen Bonding in Water113Choose the best answerThe dominant intermolecular force responsible for many unusual properties of water is:AHydrogen bondingBLondon dispersion force onlyCOrdinary dipole–dipole attraction onlyDIonic bonding Like 0 Discuss 0Share
LiquidsHydrogen Bonding114Choose the best answerH₂O is liquid while H₂S is gaseous at room temperature mainly because:AOxygen contains lone pairsBH–O bonds are ionicCWater forms strong intermolecular hydrogen bondsDH₂S has stronger hydrogen bonding Like 0 Discuss 0Share
LiquidsMolar Enthalpy of Vaporization115Choose the best answerThe heat required to convert one mole of a liquid completely into vapour at constant temperature is called:AMolar enthalpy of vaporizationBHeat of crystallizationCHeat of fusionDHeat of sublimation Like 0 Discuss 0Share