Chemical Kinetics

For the general reaction $aA + bB \rightarrow cC + dD$, the rate of reaction is expressed as:

Which of the following is true for a reaction rate?

If the rate of appearance of $NO_2$ is $0.012\ mol\ L^{-1} s^{-1}$ in the reaction $2N_2O_5 \rightarrow 4NO_2 + O_2$, what is the rate of the reaction?

Which of the following is true for an exothermic reaction when a catalyst is added?

What happens to a catalyst at the end of a chemical reaction?

In the reaction $2NO + O_2 \\rightarrow 2NO_2$, if the volume of the reaction vessel is halved, the rate of reaction will:

A termolecular reaction involves the simultaneous collision of how many reacting species?

For the complex reaction $2NO_2 + F_2 \rightarrow 2NO_2F$, the rate law is $Rate = k[NO_2][F_2]$. What is the molecularity of the rate-determining step?

The overall order of a reaction can be found by adding:

For a zero-order reaction, the concentration of a reactant decreases from an initial value of $c$ to a final value of $c/4$ in time $t$ as illustrated in the following diagram. Which of the following is the correct expression for the rate constant $k$?

For a first-order reaction, the time for $90\%$ completion is approximately how many times the time for $50\%$ completion?

Which of the following is not a characteristic of a first-order reaction?

The ratio of the time required for $99.9\%$ completion to the time required for $50\%$ completion for a first-order reaction is:

If a reaction $A \to P$ follows zero-order kinetics, then a plot of $[A]$ versus time ($t$) will be a straight line with a slope equal to:

The time required for $93.75\%$ completion of a first-order reaction is how many times the half-life?

In collision theory, the rate constant $k$ is primarily determined by:

Which of the following is NOT a requirement for a collision to result in a reaction?

Which factor deals with the geometry of the colliding molecules?

A catalyst increases the rate of the forward reaction by $10$ times. What is its effect on the rate of the backward reaction?

The frequency factor ($A$) depends on which of the following?

The energy needed to break the bonds of reactants is part of the:

What is the relationship between the activation energy of the forward reaction ($E_{af}$) and the backward reaction ($E_{ab}$) for an endothermic reaction?

The pre-exponential factor ($A$) has the same units as the rate constant because the term $e^{-E_a/RT}$ is:

A catalyst increases the rate of reaction by providing an alternative pathway which has: