LiquidsBoiling Point and Atmospheric Pressure1251Choose the best answerWater can boil at about 95°C at high altitude because:AAtmospheric pressure is lowerBAtmospheric pressure is higherCWater has no vapour pressureDHydrogen bonding disappears Like 0 Discuss 0Share
Industrial chemistry Industrial chemistry MCQS#Enzymes#Macromolecules1252Choose the best answerWhich statement correctly describes an enzyme?AThey are consumed completely during reactionsBThey are biological catalysts that speed up reactionsCThey are carbohydrates that store energyDThey function only at very high temperatures Like 0 Discuss 0Share
Industrial chemistry Industrial chemistry MCQS#Hair Dyes1253Choose the best answerHow do temporary hair dyes mainly differ from permanent hair dyes?ARemain until the hair grows outBWash out after a few washesCAlways require hydrogen peroxideDPermanently alter the hair color Like 0 Discuss 0Share
Chemistry of HydrocarbonsChemical Reactivity of Alkanes1254Choose the best answerThe low chemical reactivity of alkanes is mainly due to:APresence of π bondsBStrong C–C and C–H σ bondsCPresence of oxygen atomsDIonic bonding Like 1 Discuss 0Share
StoichiometryVapour Density and Molar Mass1255Choose the best answerAt STP, 5.6 L of a gas weighs 8 g. Its vapour density relative to H₂ is:A32B16C8D4 Like 0 Discuss 0Share