In the reaction mechanism, the step that involves the formation of a bond is called:
a) Redox step
b) Ligand exchange step
c) Coordination step
d) Bonding step
Answer: Answer: d) Bonding step
The step that involves the breaking of a bond is called:
a) Oxidation step
b) Redox step
c) Ligand exchange step
d) Bond cleavage step
Answer: Answer: d) Bond cleavage step
Which of the following is an example of a ligand exchange reaction?
a) Substitution of a halide ligand with a water ligand
b) Oxidation of a metal ion
c) Formation of a coordination compound
d) Dissociation of a metal complex
Answer: Answer: a) Substitution of a halide ligand with a water ligand
The coordination number of a metal ion in a complex is determined by:
a) The charge on the metal ion
b) The number of ligands bonded to the metal ion
c) The shape of the complex
d) The size of the ligands
Answer: Answer: b) The number of ligands bonded to the metal ion
Which of the following is an example of a redox reaction?
a) Formation of a metal complex
b) Substitution of a ligand in a coordination compound
c) Coordination of a ligand to a metal ion
d) Transfer of electrons between two species
Answer: Answer: d) Transfer of electrons between two species
The rate-determining step in a reaction mechanism is the step that:
a) Involves the highest activation energy
b) Occurs fastest
c) Involves the formation of a coordination compound
d) Is reversible
Answer: Answer: a) Involves the highest activation energy
Which of the following is true about intermediate species in a reaction mechanism?
a) They are the reactants of the overall reaction.
b) They are the products of the overall reaction.
c) They are formed and consumed during the reaction.
d) They are stable and long-lived.
Answer: Answer: c) They are formed and consumed during the reaction.
The rate of a reaction can be determined by:
a) The overall stoichiometry of the reaction
b) The concentrations of the reactants
c) The activation energy of the reaction
d) The mechanism of the reaction
Answer: Answer: d) The mechanism of the reaction
Which of the following factors can affect the rate of a reaction?
a) Temperature
b) Concentration of reactants
c) Catalysts
d) All of the above
Answer: Answer: d) All of the above
Which of the following is an example of a catalytic reaction?
a) Decomposition of hydrogen peroxide
b) Oxidation of iron
c) Formation of a metal complex
d) Dissociation of a metal ion
Answer: Answer: a) Decomposition of hydrogen peroxide
The rate constant of a reaction is affected by:
a) Temperature
b) Concentration of reactants
c) Presence of catalysts
d) All of the above
Answer: Answer: d) All of the above
The activation energy of a reaction is:
a) The energy difference between the reactants and products
b) The energy required to initiate the reaction
c) The energy released during the reaction
d) The energy of the transition state
Answer: Answer: b) The energy required to initiate the reaction
Which of the following is true about a catalyst in a reaction?
a) It is consumed during the reaction.
b) It increases the activation energy of the reaction.
c) It provides an alternate reaction pathway with lower activation energy.
d) It changes the stoichiometry of the reaction.
Answer: Answer: c) It provides an alternate reaction pathway with lower activation energy.
The coordination number of a metal ion refers to:
a) The total number of ligands in a complex
b) The number of ligands directly bonded to the metal ion
c) The charge of the metal ion
d) The atomic number of the metal ion
Answer: Answer: b) The number of ligands directly bonded to the metal ion
Which of the following is an example of a bimolecular reaction?
a) Substitution reaction between a metal complex and a ligand
b) Decomposition of a metal complex
c) Formation of a coordination compound
d) Dissociation of a metal ion
Answer: Answer: a) Substitution reaction between a metal complex and a ligand
Which of the following is an example of a unimolecular reaction?
a) Formation of a metal complex
b) Redox reaction between two metal ions
c) Ligand exchange reaction
d) Dissociation of a metal complex
Answer: Answer: d) Dissociation of a metal complex
Which of the following is an example of an intramolecular reaction?
a) Substitution reaction between a metal complex and a ligand
b) Oxidation of a metal ion
c) Ligand exchange reaction
d) Dissociation of a metal complex
Answer: Answer: d) Dissociation of a metal complex
The overall reaction order of a reaction is determined by:
a) The stoichiometry of the reaction
b) The rate-determining step
c) The mechanism of the reaction
d) The temperature of the reaction
Answer: Answer: a) The stoichiometry of the reaction
Which of the following is true about the rate-determining step in a reaction mechanism?
a) It is the fastest step in the reaction.
b) It is the slowest step in the reaction.
c) It occurs in the absence of catalysts.
d) It involves the formation of a coordination compound.
Answer: Answer: b) It is the slowest step in the reaction.
The overall rate law of a reaction is determined by:
a) The slowest step in the reaction mechanism
b) The fastest step in the reaction mechanism
c) The number of steps in the reaction mechanism
d) The concentration of the reactants
Answer: Answer: a) The slowest step in the reaction mechanism
Which of the following is an example of an outer-sphere electron transfer reaction?
a) Substitution reaction between a metal complex and a ligand
b) Redox reaction between two metal ions
c) Ligand exchange reaction
d) Dissociation of a metal complex
Answer: Answer: b) Redox reaction between two metal ions
The activation energy of a reaction is related to the rate constant by:
a) Arrhenius equation
b) Boltzmann equation
c) Nernst equation
d) Henderson-Hasselbalch equation
Answer: Answer: a) Arrhenius equation
Which of the following is an example of a coordination complex?
a) NaCl
b) H2O
c) [Fe(CN)6]4-
d) HCl
Answer: Answer: c) [Fe(CN)6]4-
The term “rate-determining step” is also known as:
a) Rate-limiting step
b) Equilibrium step
c) Transition step
d) Intermediate step
Answer: Answer: a) Rate-limiting step
Which of the following is true about catalysts in a reaction mechanism?
a) They increase the activation energy of the reaction.
b) They lower the activation energy of the reaction.
c) They change the stoichiometry of the reaction.
d) They are consumed during the reaction.
Answer: Answer: b) They lower the activation energy of the reaction.
The term “transition state” in a reaction mechanism refers to:
a) The state of highest energy during the reaction.
b) The state of lowest energy during the reaction.
c) The state where the reactants are completely converted into products.
d) The state where the products are completely converted into reactants.
Answer: Answer: a) The state of highest energy during the reaction.
Which of the following is an example of a homogeneous catalysis?
a) Enzyme-catalyzed reaction
b) Transition metal complex-catalyzed reaction
c) Acid-catalyzed reaction
d) Base-catalyzed reaction
Answer: Answer: c) Acid-catalyzed reaction
The rate-determining step in a reaction mechanism determines the:
a) Overall rate of the reaction
b) Equilibrium constant of the reaction
c) Activation energy of the reaction
d) Catalyst required for the reaction
Answer: Answer: a) Overall rate of the reaction
Which of the following is an example of an intermediate species in a reaction mechanism?
a) Reactants
b) Products
c) Transition state
d) Free radicals
Answer: Answer: d) Free radicals
Which of the following is true about the order of a reaction?
a) It determines the stoichiometry of the reaction.
b) It determines the rate of the reaction.
c) It determines the number of steps in the reaction mechanism.
d) It determines the activation energy of the reaction.
Answer: Answer: a) It determines the stoichiometry of the reaction.
The mechanism of a reaction describes:
a) The overall stoichiometry of the reaction.
b) The steps involved in the reaction.
c) The temperature dependence of the reaction rate.
d) The equilibrium constant of the reaction.
Answer: Answer: b) The steps involved in the reaction.
Which of the following is an example of an inner-sphere electron transfer reaction?
a) Substitution reaction between a metal complex and a ligand
b) Redox reaction between two metal ions
c) Ligand exchange reaction
d) Dissociation of a metal complex
Answer: Answer: a) Substitution reaction between a metal complex and a ligand
The equilibrium constant of a reaction is related to the rate constants of the forward and reverse reactions by:
a) Arrhenius equation
b) Boltzmann equation
c) Nernst equation
d) Henderson-Hasselbalch equation
Answer: Answer: c) Nernst equation
Which of the following is an example of a chain reaction?
a) Redox reaction between two metal ions
b) Ligand exchange reaction
c) Dissociation of a metal complex
d) Radical polymerization reaction
Answer: Answer: d) Radical polymerization reaction
The overall order of a reaction is determined by:
a) The sum of the orders of the individual reactants
b) The highest order of the individual reactants
c) The lowest order of the individual reactants
d) The average order of the individual reactants
Answer: Answer: a) The sum of the orders of the individual reactants
Which of the following is true about the rate constant of a reaction?
a) It is independent of temperature.
b) It is proportional to the concentration of reactants.
c) It is affected by the presence of catalysts.
d) It is determined by the activation energy of the reaction.
Answer: Answer: c) It is affected by the presence of catalysts.
Which of the following is an example of a photochemical reaction?
a) Substitution reaction between a metal complex and a ligand
b) Redox reaction between two metal ions
c) Ligand exchange reaction
d) Dissociation of a metal complex induced by light
Answer: Answer: d) Dissociation of a metal complex induced by light
The term “intermediates” in a reaction mechanism refers to:
a) The reactants of the overall reaction.
b) The products of the overall reaction.
c) The species formed and consumed during the reaction.
d) The species with the highest concentration during the reaction.
Answer: Answer: c) The species formed and consumed during the reaction.
The term “product-determining step” in a reaction mechanism refers to:
a) The step with the highest activation energy.
b) The step with the lowest activation energy.
c) The step involving the formation of the final product.
d) The step involving the consumption of the reactants.
Answer: Answer: c) The step involving the formation of the final product.
The term “reactant-determining step” in a reaction mechanism refers to:
a) The step with the highest activation energy.
b) The step with the lowest activation energy.
c) The step involving the formation of the initial reactants.
d) The step involving the consumption of the products.
Answer: Answer: a) The step with the highest activation energy.
Which of the following is an example of a concerted reaction?
a) Substitution reaction between a metal complex and a ligand
b) Redox reaction between two metal ions
c) Ligand exchange reaction
d) Dissociation of a metal complex
Answer: Answer: c) Ligand exchange reaction
The term “rate law” in a reaction mechanism refers to:
a) The overall stoichiometry of the reaction.
b) The mathematical expression describing the relationship between the rate of the reaction and the concentrations of the reactants.
c) The temperature dependence of the reaction rate.
d) The mechanism of the reaction.
Answer: Answer: b) The mathematical expression describing the relationship between the rate of the reaction and the concentrations of the reactants.
Which of the following is true about the transition state in a reaction mechanism?
a) It is a stable species.
b) It is an intermediate species.
c) It is a reactant of the overall reaction.
d) It is a product of the overall reaction.
Answer: Answer: a) It is a stable species.
The rate of a reaction is typically expressed in terms of:
a) Molar concentration per unit time
b) Molar volume per unit time
c) Grams per unit time
d) Liters per unit time
Answer: Answer: a) Molar concentration per unit time
Which of the following is true about the equilibrium constant of a reaction?
a) It determines the rate of the reaction.
b) It is independent of temperature.
c) It is affected by the presence of catalysts.
d) It depends on the stoichiometry of the reaction.
Answer: Answer: d) It depends on the stoichiometry of the reaction.
