LiquidsEvaporation61Choose the best answerEvaporation involves:AAbsorption of heatBNo energy changeCRelease of heatDFormation of ionic bonds Like 0 Discuss 0Share
LiquidsBoiling Point and External Pressure62Choose the best answerFor pure water to boil at 110°C, the external pressure must be:ALess than 760 mmHgBGreater than 760 mmHgCExactly 760 mmHgDZero Like 0 Discuss 0Share
LiquidsVapour Pressure of Water63Choose the best answerThe equilibrium vapour pressure of water at 100°C at sea level is approximately:A260 mmHgB760 mmHgC1074 mmHgD1489 mmHg Like 0 Discuss 0Share
LiquidsBoiling Points of Group 15 Hydrides64Choose the best answerWhich Group 15 hydride has the highest boiling point?ANH₃BPH₃CAsH₃DSbH₃ Like 0 Discuss 0Share
LiquidsBoiling Point65Choose the best answerWhy does water have a much higher boiling point than hydrogen sulfide (H₂S)?AWater has a higher molar massBH₂S forms stronger covalent bondsCWater is less polarDWater molecules form strong hydrogen bonds Like 2 Discuss 0Share