Chemical KineticsActivation Energy and Temperature Dependence11Choose the best answerIf the activation energy of a reaction is zero, its rate constant is:AStrongly increased by temperatureBDecreased by increasing temperatureCDecreased by decreasing temperatureDApproximately independent of temperature Like 0 Discuss 0Share
Chemical KineticsArrhenius Plot and Activation Energy12Choose the best answerFor a plot of log k against 1/T, the magnitude of slope × 2.303R equals:AThreshold energyBFrequency factorCInternal energyDActivation energy Like 0 Discuss 0Share
Chemical KineticsActivation Energy and Reaction Rate13Choose the best answerA small activation energy generally means that:AFew molecules undergo effective collisions and the reaction is slow.BMore molecules can undergo effective collisions and the reaction is faster.CMolecules cannot undergo effective collisions.DRate becomes independent of temperature. Like 0 Discuss 0Share
Chemical KineticsEffect of Catalyst on Activation Energy14Choose the best answerA reaction is catalysed by X. The primary kinetic effect of X is that it:ADecreases the rate constantBIncreases the equilibrium constantCDecreases the enthalpy changeDLowers the activation energy Like 0 Discuss 0Share
Chemical KineticsUnits of Rate Constant and Reaction Order15Choose the best answerThe rate constant has units s⁻¹. What is the order of the reaction?AZeroBFirstCSecondDFractional Like 0 Discuss 0Share