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Chapter 16 Test

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

1. 
Substances that prevent chemical reactions are called _____.
a.
catalysts
b.
endothermics
c.
inhibitors
d.
products
e.
reactants
 

2. 
When one element displaces another element in a compound, the reaction is a _____ reaction.
a.
decomposition
c.
single-displacement
b.
double-displacement
d.
synthesis
 

3. 
Each substance to the right of the arrow in a chemical equation is a(n) _____.
a.
catalyst
b.
inhibitor
c.
precipitate
d.
product
e.
reactant
 

4. 
A chemical reaction in which energy is released is _____.
a.
endothermic
b.
exothermic
c.
flammable
d.
a formula
e.
an inhibitor
 

5. 
A substance that speeds up a chemical reaction without undergoing a permanent change itself is _____.
a.
a catalyst
b.
a coefficient
c.
an inhibitor
d.
a reactant
e.
a product
 

6. 
Numbers that precede symbols and formulas in a chemical equation are _____.
a.
catalysts
b.
coefficients
c.
fractions
d.
subscripts
e.
superscripts
 

7. 
A term that means "putting together" is _____.
a.
catalyst
b.
decomposition
c.
product
d.
reactant
e.
synthesis
 

8. 
The breaking down of a compound into simpler substances is _____.
a.
decomposition
c.
product
b.
displacement
d.
synthesis
 

9. 
Each substance on the left side of the arrow in a chemical equation is a _____.
a.
catalyst
b.
coefficient
c.
product
d.
reactant
e.
synthesis
 

10. 
If thermal energy must be added to a chemical reaction for the reaction to take place, the reaction is _____.
a.
balanced
b.
endothermic
c.
exothermic
d.
reactant
e.
coefficient
 

11. 
In a chemical equation, the symbol that means "dissolved in water" is _____.
a.
(aq)
b.
(cr)
c.
(dw)
d.
(I)
e.
(g)
 

12. 
Which of the following is a balanced chemical equation?
a.
AgNO3 + NaCl —> 4AgCl + 2NaNO3
c.
AgNO3 + NaCl —> AgCl + NaNO3
b.
2AgNO3 + 2NaCl —> 3AgCl + 2NaNO3
d.
AgNO3 + 2NaCl —> AgCl + 3NaNO3
 

13. 
_____ chemical equation has the same number of atoms of each element on each side of the equation.
a.
A balanced
c.
A simple
b.
A complex
d.
An unbalanced
 

14. 
Ozone in the atmosphere protects living things from _____.
a.
CFCs
c.
having too little food
b.
each other
d.
UV rays from the sun
 

15. 
What type of reaction is shown in the following chemical equation? NH3 + HCl —> NH4Cl
a.
decomposition
c.
single displacement
b.
double displacement
d.
synthesis
 

16. 
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
a.
There is no relationship.
c.
The mass of the reactants is greater.
b.
The mass of the products is greater.
d.
The masses are equal.
 

17. 
What type of reaction is shown in the following chemical equation? 2H2O —> 2H2 + O2
a.
decomposition
c.
single displacement
b.
double displacement
d.
synthesis
 

18. 
Which of the following could represent a decomposition reaction?
a.
compound = element + element
b.
compound + compound = compound + compound
c.
element + compound = element + compound
d.
element + element = compound
 

19. 
According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product?
a.
0
b.
1
c.
2
d.
3
e.
4
 

20. 
What is an insoluble solid that forms as the result of a chemical reaction?
a.
an aqueous
c.
an inhibitor
b.
a catalyst
d.
a precipitate
 

21. 
One possible solution to harmful effects of _____ on the ozone layer is to find safe alternatives.
a.
CFCs
c.
smog
b.
fluorine
d.
smoke
 

Matching
 
 
chapter_16_practice_files/i0240000.jpg

Match each of the models in Figure 16-1 with the type of reaction it represents.
a.
single displacement
b.
decomposition
c.
double displacement
d.
synthesis
 

22. 
Model 1
 

23. 
Model 2
 

24. 
Model 3
 

25. 
Model 4
 



 
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