Chemical KineticsCatalysis46Choose the best answerWhich statement is NOT necessarily true about a catalyst?AIt cannot make a thermodynamically non-spontaneous reaction spontaneous.BIt is regenerated overall after the reaction.CIt does not change the enthalpy change of reaction.DIt must remain in exactly the same physical state throughout the reaction. Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Chemical Kinetics#Surface Area and Reaction Rate47Choose the best answerQ.88 Pulverized CaCO₃ reacts faster because of the increase in:APressureBSurface areaCVolumeDSurface tension Like 0 Discuss 0Share
Chemical KineticsOverall Order of Reaction48Choose the best answerFor the rate law Rate = k[A]¹ᐟ²[B]³ᐟ², the overall order of reaction is:A1.5B2C3D1 Like 0 Discuss 0Share
MDCAT Chemistry Past Papers Reconduct 2023#Chemical Kinetics#Reaction Rate49Choose the best answerIn reaction A → B, the rate of disappearance is best represented by: (MDCAT Reconduct 2023)A-dA/dtB-dAB/dtC-dB/dtDdB/dt Like 0 Discuss 0Share
Chemical KineticsPseudo-First-Order Reactions50Choose the best answerUnder usual acid-catalysed conditions, inversion of sucrose behaves as a:AZero-order reactionBPseudo-first-order reactionCSecond-order reactionDThird-order reaction Like 0 Discuss 0Share