19 Questions
What is the key factor that limits the molecularity of a reaction to never exceed three?
Limited chances for molecules to undergo effective collisions.
In a multistep reaction, how is the molecularity determined?
Separately in each step.
In a complex reaction, what is the slowest step called?
Rate determining step
What is the overall molecularity of a complex reaction equal to?
Molecularity of the slowest step
If a reaction has a molecularity of 1, what is it called?
Unimolecular
What does the order of reaction define?
Number of reactants determining the rate of reaction.
If a reaction is bimolecular, what is its molecularity?
2
Rate constant units for a second-order reaction are:
$mol L^{n} s^{-1}$
Rate constant units for a third-order reaction are:
$mol^{-2} L^{2n-1} s^{-1}$
What does the Arrhenius equation define?
Relationship between reaction rate and activation energy
In the Van’t Hoff differential method, what does 'n' represent?
Change in activation energy with temperature
For a pseudo-unimolecular reaction, what does 'V∞' refer to?
Volume at infinity
What is the relationship between activation energy (Ea) and threshold energy?
Ea = Threshold energy - Potential energy of reactants
Which equation describes the relationship between two different temperatures (T1 and T2) and activation energy (Ea)?
Ea = 2.303R log10(T2/T1)
What is the formula for the rate constant (k) in the Arrhenius equation?
k = Ae or -Ea/RT log
What is the half-life method used for in chemical kinetics?
Comparing half-lives of reactions with different orders
'Order' in chemical kinetics refers to what aspect of a reaction?
[A]m [B]n in the rate equation
For a second-order reaction, what does 'dx ∝ [A]1/dt' represent?
[A] concentration over time for a second-order reaction
What is the formula for calculating 'n' in the Van’t Hoff differential method?
Change in activation energy with temperature over difference in concentration logs
Test your knowledge on the Arrhenius equation used to evaluate energy of activation and to show the effect of temperature on rate constants, as well as concepts related to chemical kinetics and the Boltzmann factor. This quiz may also include questions from previous year's exams.
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