UHS MDCAT 2024 Chemistry#Chemical Kinetics#Rate Law26Choose the best answerIdentify the correct formula to calculate rate of reaction:AChange in concentration of substance / Time taken for the changeBTime taken for the change / Change in concentration of substanceC(Time taken for the change / Change in concentration of substance) × 100DTime taken for the change × Change in concentration of substance Like 0 Discuss 0Share
Chemical KineticsConcentration-Time Curve and Reaction Rate27Choose the best answerDuring a reaction, the concentration–time curve initially changes rapidly but becomes nearly horizontal after a long time. In this nearly horizontal region, the concentration changes very little with time. What does this indicate?AReaction rate is maximumBReaction rate is rapidly increasingCReaction rate is approximately zeroDConcentration is changing rapidly Like 0 Discuss 0Share
UHS MDCAT 2025 Chemistryuhs mdcat chemistry 2025#Activation Energy#Chemical Kinetics28Choose the best answerAmount of energy needed to weaken the existing bonds to an extent that can be broken through collision is called:ABond energyBActivation energyCAverage energyDEnthalpy Like 0 Discuss 0Share
SINDH MDCAT 2018 Chemistry#Activation Energy#Chemical Kinetics29Choose the best answerThe reaction 2CO + O₂ → 2CO₂ proceeds slower because of activation energy of CO. (Sindh MDCAT 2018)AequilibriumBconstantClowDhigh Like 0 Discuss 0Share
Chemical KineticsEffect of Concentration on Reaction Rate30Choose the best answerWood burns faster in pure O₂ than in air because the concentration of oxygen in pure O₂ is approximately:A3 times greaterB4 times greaterC5 times greaterD7 times greater Like 0 Discuss 0Share