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9th Grade Chemistry- Special Classes of Compounds Practice Test



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

 1. 

Thanks to NASA, scientists have found an arsenic based microorganism living in Mono Lake, California.  For the rest of the organisms on Earth, they are all made up of carbon based molecules called
a.
ionic bonds
c.
organic compounds
b.
solvents
d.
inorganic compounds
 

 2. 

If you mixed vinegar with baking soda the result is a pH change to
a.
14
c.
7
b.
3
d.
1
 

 3. 

Carbon is able to form covalent bonds to many other elements due to the number of valence electrons it has
a.
2
c.
3
b.
1
d.
4
 

 4. 

One acid in the human body is called an amino acid, these acids make up
a.
proteins
c.
lipids
b.
carbohydrates
d.
glucose
 

 5. 

Hydrocarbons contain
a.
Hydrogen and Carbon
c.
Iron and Carbon
b.
Helium and Carbon
d.
Oxygen and Carbon
 

 6. 

The night before a sports event we load up with sugars called _____________ to give us enough energy to compete the next day.
a.
proteins
c.
carbohydrates
b.
lipids
 

 7. 

Saturated hydrocarbons, such as gasoline or petroleum, contain carbon and hydrogen.  These bonds are
a.
single, double, and triple
c.
Triple (C=H)
b.
double (C=H) only
d.
single (C-H) only
 

 8. 

You notice that your front lawn (Kentucky Bluegrass) is a light green color in all areas except for the dark green spots where your dog has urinated.  You take a pH reading of the soil below the grass and it shows a pH of “8”. 
a.
The soil is neutral
c.
The soil contains too acidic
b.
The soil is too basic
 

Matching
 
 
Match the following acid, base, or both.  If you can't remember click here for help.
a.
Acid
c.
Acid and Bases
b.
Base
 

 9. 

Corrosive - will burn skin
 

 10. 

Turns blue litmus paper to red
 

 11. 

Contains H+ (Hydrogen ions) when dissolved in water
 

 12. 

Has a bitter taste
 

 13. 

Less than 7 on the pH scale
 

 14. 

Greater than 7 on the pH scale
 

 15. 

reacts with metals to form Hydrogen gas
 

 16. 

Contains OH-  (Hydroxide ions)
 

 17. 

Sour taste
 

 18. 

Turns red litmus paper to blue
 

 19. 

Soapy feel
 

 20. 

Conducts electricity
 



 
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