WorksheetsQuiz 1 - Reaction Rate - Chemistry - Grade 12- W5
Total questions: 10
Worksheet time: 19mins
One factor that cannot be adjusted in order to improve a reaction rate is
temperature
surface area.
nature of the reactant.
concentration
...
Catalysts affect reaction rates by
forming an activated complex with lower energy.
broadening the energy barrier.
increasing the activation energy.
changing the net thermodynamics of the reaction
....
A rate law relates
reaction rate and temperature.
reaction rate and concentrations of reactants.
temperature and concentrations of reactants.
energy and concentrations of reactants.
..
If the concentration of reactants is higher,
the reaction rate is generally higher.
the reaction rate is generally lower.
the reaction rate is generally not affected.
the rate-determining step is eliminated.
...
To find a reaction order, compare the rate ratio with the
time ratio.
temperature ratio.
pressure ratio.
concentration ratio.
...
If the concentration of a reactant in a mixture is tripled and the reaction rate increases by a factor of nine, the reaction order with respect to that reactant is
zero
one
two
three
...
The specific rate constant, k,
changes for different concentrations of reactants.
doesn’t change for different concentrations of reactants.
is not affected by increasing temperature.
is not affected by addition of a catalyst.
...
The rate-determining step of a reaction is always the
first step.
last step.
fastest step.
slowest step.
...
Which factor(s) can influence the rate of a reaction?
surface area
temperature
concentration
All of the above
...
Which process is used to speed up chemical reactions?
inhibition
activation
catalysis
calorimetry
...
