Chapter 10:
Organic Chemistry
Practice Test
1.
Which of the following is true of the 18 possible isomers of octane (C
8
H
18
])?
a.
They contain carbon atoms covalently bonded to hydrogen and carbon atoms.
d.
All of the above.
Hint
2.
Proteins, a type of hydrocarbon polymers, are a necessary part of all living cells. Which substituted hydrocarbons is linked to form proteins?
a.
alcohols
b.
carboxylic acids
d.
None of the above.
Hint
3.
Both lipids and carbohydrates are hydrocarbon polymers that contain carbon, hydrogen, and oxygen. What quality distinguishes lipids from carbohydrates?
a.
Lipids are a type of protein while carbohydrates are a type of sugar.
b.
Lipids are a more concentrated source of energy for the body than carbohydrates.
c.
For a balanced diet, you should eat more lipids than carbohydrates.
d.
Your body can break down lipids but cannot break down carbohydrates.
Hint
4.
Which of the following cannot be a hydrocarbon?
a.
methane
b.
substances that form solids or liquids at room temperatures
c.
a substance containing only carbon, hydrogen, and nitrogen
d.
substances with low boiling points due to short carbon-hydrogen chains
Hint
5.
What do alcohols, carboxylic acids, amines, and amino acids all have in common?
a.
All are formed when a methyl(-CH
3
) group is displaced by a carboxyl (-COOH) group.
b.
All contain a hydroxyl (-OH) group substitution for one or more hydrogen atoms in a hydrocarbon.
c.
All are substituted hydrocarbons.
d.
All of the above.
Hint
6.
What do methane, ethane, and octane have in common?
a.
They are supersaturated hydrocarbons.
b.
They are unsaturated hydrocarbons.
c.
They occur only in ring structures.
d.
They contain both covalent and ionic bonds.
Hint
7.
What does the octane rating for gasoline tell you?
a.
It measures the amount of octane in fuel
b.
The tendency of fuel to knock.
c.
It measures the amount of heptane in fuel.
d.
All of the above.
Hint
8.
Which of the following describes alcohols?
a.
compounds formed when a hydroxyl (-OH) group replaces one or more hydrogen atoms in a hydrocarbon
b.
a type of hydrocarbon
c.
compounds that contain only double bonds between the carbon the oxygen atoms
d.
compounds used only as disinfectants and cleaners
Hint
9.
What is the difference between formic acid and methylamine?
a.
There is no difference; methylamine is another name for formic acid.
b.
Formic acid is a carboxylic acid and methylamine is an alcohol.
c.
Formic acid contains a carboxyl (-COOH) group and methylamine contains an amine (-NH
2
) group.
d.
Formic acid is an alcohol and methylamine is an amine.
Hint
10.
What would you call two hydrocarbons with different molecular structures but identical chemical formulas?
a.
unsaturated hydrocarbons
b.
covalent
c.
ethene
d.
isomers
Hint
11.
What term best describes substances containing carbon?
a.
food
b.
natural materials
c.
organic compounds
d.
living organisms
Hint
12.
Which of the following
best
describes polymers?
a.
large molecules made up of smaller organic molecules, called isomers, that are linked together to form new bonds
b.
hydrocarbons in which some of the carbon atoms form double or triple covalent bonds with other carbon atoms
c.
proteins, carbohydrates, and lipids
d.
large molecules made up of smaller organic molecules, called monomers, that are linked together to form new bonds
Hint
13.
Why does carbon combine with so many other elements?
a.
the color carbon turns when combined with sulfuric acid
b.
its atomic structure
c.
its atomic radius
d.
its ability to bond with hydrogen and nitrogen
Hint
14.
What do glucose, sucrose, and starch have in common?
a.
They each contain twice as many hydrogen atoms as oxygen atoms.
b.
They are polymers.
c.
its atomic radius
d.
All of the above.
Hint
15.
If your diet contains too much cholesterol, cholesterol may build up in the arteries of your heart. What would happen if you completely avoided eating any cholesterol?
a.
Your body would make its own supply of cholesterol.
b.
Your body would run out of cholesterol.
c.
Your cell membranes would be healthier.
d.
None of the above.
Hint
