LiquidsBoiling Point11Choose the best answerA liquid boils when:AIts vapour pressure equals the external pressureBIts vapour pressure is always less than atmospheric pressureCIts vapour pressure becomes zeroDIts intermolecular forces disappear completely Like 0 Discuss 0Share
LiquidsBoiling Point and External Pressure12Choose the best answerIf the external pressure on a liquid is reduced from 760 mmHg to 50 mmHg, its boiling point will:ADecreaseBRemain unchangedCIncreaseDBecome independent of pressure Like 0 Discuss 0Share
LiquidsVapour Pressure and Volatility13Choose the best answerWhich liquid has the highest vapour pressure among the following?AWaterBGlycerolCMercuryDPentane Like 0 Discuss 0Share
LiquidsEvaporation14Choose the best answerThe escape of high-energy molecules from the surface of a liquid is called:ASublimationBDistillationCCondensationDEvaporation Like 0 Discuss 0Share
LiquidsVapour Pressure and Boiling Point15Choose the best answerA liquid will boil earliest if its vapour pressure at room temperature is:A800 torrB650 torrC500 torrD400 torr Like 0 Discuss 0Share