SINDH MDCAT 2019 CHEMISTRY#Chemical Kinetics#Rate Law41Choose the best answerA catalyst increases the rate of reaction by: (Sindh MDCAT 2019)Adecreasing the activation energyBdecreasing the concentration of reactantsCdecreasing the temperatureDincreasing the temperature Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Chemical Kinetics#Order of Reaction42Choose the best answerQ.84 Reaction H₂ + Cl₂ → 2HCl is a:ASecond orderBFirst orderCHalf orderDZero order Like 0 Discuss 0Share
Chemical equilibrium 01Chemical equilibrium #Chemical Kinetics#Rate Law43Choose the best answerFor the elementary reaction aA + bB ⇌ cC + dD, the forward rate is:ARf = kf[C]ᶜ[D]ᵈBRf = kf[A]ᵃ[B]ᵇCRf = kr[A]ᵃ[B]ᵇDRf = kf[A][B] Like 0 Discuss 0Share
KMU MDCAT 2024 Chemistry#Chemical Kinetics#Order of Reaction44Choose the best answerA reaction is first order with respect to A and second order with respect to B, the rate equation is (KMU MDCAT 2024)ARate = k[A]BRate = k[A][B]CRate = k[A]²[B]DRate = k[A][B]² Like 0 Discuss 0Share
Chemical KineticsInstantaneous and Average Rate45Choose the best answerWhich statement is false?AFor a typical reaction whose rate decreases with time, the initial instantaneous rate is high.BThe activated complex has a very short lifetime.CA tangent to a concentration–time curve gives the average rate.DOnly a fraction of molecular collisions are effective. Like 0 Discuss 0Share