A level chemistry ocr a question) Which statement about the rate-determining step of a reaction is correct: A- It is the fast step, B- It cannot involve a catalyst, C- it doesn't involve 0 order reagents, D- it is always between two first order reagents

Below are the elementary steps that make-up the reaction mechanism for the following reaction.F2 + 2 NO2 → 2 NO2FStep 1: F2 + 2 NO2 → NO2F + F + NO2 (slow)Step 2: F + NO2 → NO2F (very fast)Which is the rate determining step?Group of answer choicesStep 1Step 2

define ‘chemical kinetics’; *9.2 Rate and Order of Reaction 9.2.1 define the terms:a. rate of reactionb. rate lawc. order of reactiond. rate constante. rate determining step;*9.2.2 explain the significance of the rate determining step on theoverall rate of a multistep reaction;*9.2.3 determine the rate law for the given reactions; *9.2.4 deduce the order of reaction using the method of initial rate; *9.3 Collision Theory, Transition Stateand Activation Energy9.3.1 relate activation energy and activated complex to the rate ofreaction;*9.3.2 calculate the initial rate using concentration data of givenreactions;*9.3.3 draw a labelled energy diagram for a chemical reactionrepresenting the activation energy and the effect of catalyst;*9.3.4 describe collision theory; *9.3.5 explain the effect of concentration, temperature and surfacearea on rate of reaction by using collision theory;*9.4 Catalysis 9.4.1 define the term ‘catalyst’; *9.4.2 explain homogeneous and heterogeneous catalysis; *9.4.3 explain the effect of catalyst on the rate of reaction. *

15. The rate constant for a first order reaction depends on _____________

What does the reaction rate say about a reaction?A.It tells what the concentration of reactants is.B.It tells if a catalyst was used in the reaction.C.It tells how quickly products will be made.D.It tells what activation energy the reaction has.

Which of the following would speed up the rate of reaction?Decreasing the temperatureUsing powder rather than lumps of reactantDecreasing the concentration of reactantRemoving a catalyst2Which of the following statements about catalysts is not true?They speed up chemical reactionsThey are chemically unchanged by a reactionThey lower the activation energy required for a reactionThey are chemically changed by a reaction3Why are catalysts useful for producing chemicals in industry?They are cheapThey increase the amount of productThey reduce the amount of reactant neededThey lower the amount of activation energy required4In the core practical ‘Investigating the effect of concentration on the rate of reaction between sodium thiosulfate and hydrochloric acid’, what is the dependent variable? Time taken for reaction to completeConcentration of hydrochloric acidTemperatureConcentration of sodium thiosulfate5In this practical, the first trial uses 5 cm3 of sodium thiosulfate solution dissolved in 25 cm3 of water. If the second trial uses 10 cm3 of sodium thiosulfate solution, how much water should be added to make the investigation a fair test? 10 cm350 cm320 cm325 cm36When investigating the rate of reaction, if one variable increases as the other decreases, what is the relationship between the two variables? UncorrelatedPositively correlatedDirectly proportionalInversely proportional