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- 1. Multiple Choice
Why does a higher temperature increase the rate of a reaction?
it increases both the frequency and energy of particle collisions
it only increases the frequency of particle collisions
it only increases the energy of particle collisions
it reduces the activation energy of the reaction
- 2. Multiple Choice
Grinding a effervescent tablet into powder increases the rate of reaction due to increased
concentration
surface area
temperature
reactants
- 3. Multiple Choice
Adding a catalyst ___________ the activation energy.
Raises
Lowers
Doesn't affect
Inreases
- 4. Multiple Choice
The minimum amount of energy needed for colliding particles to react is called
Chemical Energy
Kinetic Energy
Activation Energy
Potential Energy
- 5. Multiple Choice
Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?
- 6. Multiple ChoiceThe graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off?ABCD
- 7. Multiple ChoiceIn an experiment, a 2 g lump of zinc and 2 g of powdered zinc are added separately to equal volumes of dilute sulphuric acid. The solid line on the graph shows the volume of gas given off when the 2 g lump is used. Which dotted line is obtained when the zinc is powdered?ABCD
- 8. Multiple ChoiceA student investigated the rate of reaction of calcium carbonate with dilute hydrochloric acid. Every minute, the student recorded the total volume of carbon dioxide produced, until some time after the reaction was complete.
Which graph shows the correct results?ABCD - 9. Multiple ChoiceOrder the letters from highest to lowest rate of reaction.A > B > C > DA > BC > D (B and C have the same rate)A > B > CD (C and D have the same rate)D > C > B > A
- 10. Multiple ChoiceWhy does a catalyst increase the rate of reaction?it produces extra energy for the reactantsit increases the speed of the reactant particlesit increases the frequency of particle collisionsit reduces the activation energy of the reaction
- 11. Multiple ChoiceWhy don't all collisions between particles cause a reaction?the particles also need to collide with a catalystnot all the particles collide with enough energynot all the particles collide at a high enough temperaturethe particles need to collide with each other twice
- 12. Multiple Choice
How could we make this reaction happen more quickly?
Decrease the concentration of the acid
crush the chalk to increase the surface area
Put the test tube in an ice bath
- 13. Multiple Choice
The major theory of reaction rate is called
Collision theory
Crash theory
Newton's laws
Thermodynamics
- 14. Multiple ChoiceThe 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 largerBlue, because the activation energy is lowerboth reaction progress at the same rate
- 15. Multiple ChoiceWhat does NOT happen when the temperature is increased?Particles collide more oftenParticles collide with more energyParticles move fasterMore particles collide in the correct orientation
- 16. Multiple ChoiceWhat makes an effective collision?When molecules collide.When molecules collide with the proper orientation.When molecules collide with proper orientation and enough kinetic energy.High Temperature.
- 17. Multiple ChoiceWhat is the rate of reaction?How fast a reaction isHow big a reaction isHow loud a reaction isHow much gas a reaction produces
- 18. Multiple ChoiceWhich letter corresponds to the activation energy of the forward reaction?ABCD
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