AP Chemistry Kinetics — practice questions
26 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP Chemistry Kinetics in the app →What name is given to the instantaneous rate of a reaction at the moment the reaction commences?Rates of reactions involving aqueous electrolytes are conveniently followed by measuring which property?In a hydrogen peroxide decomposition, the concentration falls from 0.250 M at 12.00 h to 0.125 M at 18.00 h. WIn the reaction 5Br- + BrO3- + 6H+ giving 3Br2 + 3H2O, bromide ion is disappearing at 3.5 x 10^-4 M/s at some Acetaldehyde decomposes to methane and carbon monoxide. Initial rates are 2.06 x 10^-11 at 1.75 x 10^-3 M, 8.2For OCl- + I- giving OI- + Cl-, trials give: 0.0040 M OCl- with 0.0020 M I- reacts at 0.00184; 0.0020 M with 0A rate constant is reported in units of L/mol/s. What is the overall order of its reaction?For methanol reacting with ethyl acetate, the rate law is rate = k[CH3OH]. What are the orders in ethyl acetatN2O5 dissolved in chloroform decomposes by a first order path with k = 6.2 x 10^-4 per minute. What is the ratThe reaction NO + O3 giving NO2 + O2 is first order in each reactant with k = 2.20 x 10^7 L/mol/s. What is thePenicillinase converts penicillin into inactive molecules. Rates: 1.0 x 10^-10 at 2.0 x 10^-6 M penicillin, 1.Iodine-131 decays to xenon-131 by a first order process with a rate constant of 0.138 per day. How many days dHeated to 499 degrees Celsius, cyclopropane isomerises to propene with k = 5.95 x 10^-4 per second. What fractOzone decomposes by the two step mechanism O3 giving O2 + O, then O + O3 giving 2O2. Which species is an interAs a simple second order reaction proceeds, what happens to its half-life?A first order reaction has a half-life of 8.50 min. Starting from 0.150 mol/L, how long until the concentratioA derived overall rate law contains the concentration of a product species in its denominator. What does this When carbon monoxide collides with an oxygen molecule, which collision orientation is more likely to yield carIn the Arrhenius equation k = Ae^(-Ea/RT), what does the exponential factor represent?A reaction diagram shows a forward activation energy Ea and an enthalpy change delta H. What is the activationNitric oxide reacting with chlorine, 2NO + Cl2 giving 2NOCl, appears to occur as an elementary termolecular stAbove 225 degrees Celsius, NO2 + CO giving NO + CO2 follows rate = k[NO2][CO]. With what kind of mechanism is Heterogeneous catalysis proceeds through at least four steps. Which comes first?Which metal catalyses the hydrogenation of polyunsaturated fats and oils into saturated ones?Which enzyme model pictures the active site as flexible, changing shape to bind its substrate?What forms when a substrate binds at an enzyme's active site during catalysis?