WorksheetsCatalysts and Reaction Rates
Total questions: 8
Worksheet time: 5mins
The rate of a chemical reaction normally
increases as temperature decreases.
decreases when a catalyst is added.
increases as reactant concentration increases.
decreases as reactant concentration increases.
Crushing a solid into a powder will increase reaction rate because:
the particles will collide with more energy
the orientation of colliding particles will be improved
the activation energy barrier will be lowered
the powdered form has more surface area
A lump of ignited charcoal which is glowing in air burns more vigorously when lowered into a bottle of pure oxygen. This is due to an increase in
surface area
temperature
concentration
volume
What happens to a catalyst in a reaction?
It remains unchanged.
It is incorporated into the reactants.
It is incorporated into the products.
It evaporates.
Which out of the following is NOT a factor that affects the rate of a reaction
temperature
concentration
surface area
volume
catalysts
Why does a higher concentration increase the rate of reaction?
it increases the amount of reactants
it lowers the activation energy
it increases the energy of particle collisions
it increases the frequency of particle collisions
Which of the following increases the reaction rate?
less surface area
lower temperature
more particle size
increased concentration
