Name: 
 

Chapter 10 - Section3



Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

A chemical reaction in which energy is released or removed is
a.
exothermic.
c.
a synthesis reaction.
b.
endothermic.
d.
a decomposition reaction.
 

 2. 

Which of the following is an example of an exothermic reaction?
a.
Light energy is released in light sticks.
b.
Electrical energy is released in the dry cells of a flashlight.
c.
Light and thermal energy are released in a campfire.
d.
all of the above
 

 3. 

Which reaction requires a continuous supply of energy?
a.
an exothermic reaction
c.
a synthesis reaction
b.
an endothermic reaction
d.
a decomposition reaction
 

 4. 

Which of the following is an example of the use of activation energy?
a.
plugging in an iron
c.
holding a lit match to paper
b.
playing basketball
d.
eating
 

 5. 

Which of the following would NOT provide activation energy for a reaction?
a.
the friction of striking a match
c.
a beam of light
b.
an electric spark in a car's engine
d.
a vacuum
 

 6. 

The minimum amount of energy needed for substances to react is called
a.
activation energy.
c.
exothermic energy.
b.
catalytic energy.
d.
endothermic energy.
 

 7. 

Why must hydrogen peroxide be stored in a dark bottle to maintain its freshness?
a.
to block thermal energy
c.
to decompose the contents
b.
to block light energy
d.
none of the above
 

 8. 

Which of the following samples of baking soda would react the fastest with vinegar?
a.
powder
c.
small crystal
b.
small cube
d.
They all react at the same rate.
 

 9. 

A substance that slows down or stops a chemical reaction is called a(n)
a.
product.
c.
inhibitor.
b.
catalyst.
d.
concentrate.
 

 10. 

A reaction will occur only if the particles of
a.
products collide.
c.
both products and reactants collide.
b.
reactants collide.
d.
None of the above
 



 
Check Your Work     Start Over