MDCAT Chemistry Paper 2025#Activation Energy#Chemical Kinetics66Choose the best answerThe formation of activated complex in a reaction is: (IBA MDCAT 2025)AExothermic processBEndothermic processCEither endo or exoDAlways energy released Like 0 Discuss 0Share
Chemical KineticsArrhenius Equation and Frequency Factor67Choose the best answerIn the Arrhenius equation k = Ae⁻ᴱᵃ⁄ᴿᵀ, the pre-exponential factor A depends on:ANature of reacting moleculesBMolecular structure and orientationCCollision frequencyDAll of the above Like 0 Discuss 0Share
Chemical KineticsOrder of Reaction68Choose the best answerFor a first-order reaction, which quantity remains constant during the reaction?AHalf-lifeBConcentration of reactantCRate of reactionDAmount of product formed Like 1 Discuss 0Share
Chemical KineticsThreshold Energy69Choose the best answerThe minimum total energy that colliding molecules must possess for an effective collision is called:AInternal energyBActivation energyCThreshold energyDHeat of reaction Like 0 Discuss 0Share
Chemical KineticsForward and Reverse Activation Energies70Choose the best answerIf Ef and Er are the activation energies of the forward and reverse reactions, respectively, and the forward reaction is exothermic:AEf > ErBEf < ErCEf = ErDNo relationship exists Like 0 Discuss 0Share