Chemical kinetics #Molecularity1Choose the best answerWhich statement correctly describes molecularity?AIt can be zeroBIt may be fractionalCIt is defined only for an elementary reactionDIt is obtained from the overall rate law Like 0 Discuss 0Share
Chemical kinetics #Catalytic Properties#Transition Elements2Choose the best answerWhen a catalyst is added to a reversible reaction, which quantity remains unchanged?AActivation energy of the forward reaction.BActivation energy of the reverse reaction.CEquilibrium constant (K).DRate constant. Like 0 Discuss 0Share
Chemical kinetics #Rate Constant3Choose the best answerWhich statement about the rate constant, k, is correct?AIt is independent of temperature.BIt depends only on the initial concentration of reactants.CIts value changes with temperature but not with reactant concentration.DIt is equal to the reaction rate. Like 0 Discuss 0Share
Chemical kinetics #Rate Law4Choose the best answerFor 2A + B → products, the experimental rate law is Rate = k[A][B]. Which statement is correct?AThe reaction is elementary.BThe reaction is first order with respect to A.CThe stoichiometric coefficient of A must be 1.DThe overall order of the reaction is 3. Like 0 Discuss 0Share
Chemical kinetics #Catalytic Properties#Transition Elements5Choose the best answerWhy does a catalyst increase the rate of a chemical reaction?AIncreases the kinetic energy of reactant molecules.BDecreases the activation energy by providing an alternative pathway.CIncreases the enthalpy change (ΔH) of the reaction.DIncreases the equilibrium constant. Like 0 Discuss 0Share