Rates of Reaction - Quiz - gcsescience.com

1. Collision theory says that a chemical reaction
      can only take place when particles

a) Collide

b) Get hot

c) Turn blue

d) Go shopping

 

2. An increase in temperature

a) Will turn particles positive

b) Will turn particles negative

c) Will decrease the rate of reaction

d) Will increase the rate of reaction

 

3. For chemicals in solution, increasing the concentration
      will increase the rate of reaction because

a) The particles are stronger

b) The particles are bigger

c) The particles are smaller

d) The particles are closer together

 

4. For chemicals that are gases, increasing the pressure
      will increase the rate of a reaction because

a) The particles are stronger

b) The particles are bigger

c) The particles are smaller

d) The particles are closer together

 

5. Compared to lumps, a powder has

a) Less water

b) A bigger surface area

c) A smaller surface area

d) The same surface area

 

6. The rate of a reaction can be accurately measured by

a) The smell of smoke

b) The temperature of a reactant

c) The rate of formation of a product

d) The speed of a falling rock

 

7. The minimum amount of energy needed
      for colliding particles to react is called

a) The rest mass

b) The rest energy

c) The activation mass

d) The activation energy

 

                       
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