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- 1. Multiple Choice
The rate of a chemical reaction is NOT affected by which of the following:
temperature
particle size (surface area)
concentration
All of these affect reaction rates
- 2. Multiple Choice
A temperature increase causes the particles ......
to slow down
collide higher
move faster
in the right order
- 3. Multiple Choice
What is the rate of reaction?
How fast a reaction is
How loud a reaction is
How big a reaction is
How much gas a reaction produces
- 4. Multiple Choice
Products will form faster if____________
the particle size of the reactants are larger.
concentration of the reactants are increased.
temperature is decreased.
the reaction is not stirred.
- 5. Multiple Choice
The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?
Red, because the activation energy is larger
both reaction progress at the same rate
Blue, because the activation energy is lower
- 6. Multiple Choice
Grinding a effervescent tablet into powder increases the rate of reaction due to increased
concentration
temperature
surface area
reactants
- 7. Multiple Choice
Which factors increase the rate of a reaction?
increasing temperature
increasing surface area
increasing concentration
All of these
- 8. Multiple Choice
Why does breaking up a solid reactant increase the rate of reaction?
it creates more solid
it increases the surface area
it creates more energy
it increases the concentration
- 9. Multiple Choice
In an exothermic reaction, heat is ...
taken in
given out
- 10. Multiple Choice
Why does a higher concentration increase the rate of reaction?
it increases the amount of reactants
it increases the energy of particle collisions
it lowers the activation energy
it increases the frequency of particle collisions
- 11. Multiple Choice
What makes an effective collision?
When molecules collide.
When molecules collide with proper orientation and enough kinetic energy.
When molecules collide with the proper orientation.
High Temperature.
- 12. Multiple Choice
Why don't all collisions between particles cause a reaction?
the particles also need to collide with a catalyst
not all the particles collide with enough energy
not all the particles collide at a high enough temperature
- 13. Multiple Choice
Located on the left side of the reaction
reactants
products
- 14. Multiple Choice
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
smaller
larger
- 15. Multiple Choice
sodium thiosulfate + hydrochloric acid →
sodium chloride + water + sulfur
sodium chloride + water + sulfur dioxide
sodium chloride + water + sulfur dioxide + sulfur
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