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Organic Practice Intro

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

 1. 
Which of the following are organic compounds?
a.
fats (lipids)
d.
carbohydrates
b.
proteins
e.
all of the above
c.
antibiotics
 

 2. 
The theory of "vitalism" proposed that
a.
only vital organic compounds could be synthesized
b.
organic compounds could not be synthesized
c.
the synthesis of organic compounds involved a "vital force" found only in living organisms
d.
the synthesis of inorganic compounds was vital to our survival
e.
none of the above
 

 3. 
The first organic compound that was successfully created in a lab was
a.
butane
d.
urea
b.
sucrose
e.
ammonium cyanate
c.
ethanoic acid
 

 4. 
The nonpolar nature of hydrocarbons accounts for which of the following physical properties?
a.
low melting and boiling points
d.
low solubility in water
b.
low densities
e.
all of the above
c.
state at room temperature
 

 5. 
Trends in the physical properties of hydrocarbons can be explained by which of the following intermolecular forces?
a.
London forces
d.
hydrogen bonding
b.
dipole-dipole interaction
e.
none of the above
c.
carbon bonding
 

 6. 
Which of the following is not a structural isomer of pentane?
a.
mc006-1.jpg
d.
mc006-4.jpg
b.
mc006-2.jpg
e.
none of the above
c.
mc006-3.jpg
 

 7. 
Natural gas is mainly composed of
a.
mc007-1.jpg (methane)
d.
mc007-4.jpg (propane)
b.
mc007-2.jpg (ethane)
e.
mc007-5.jpg (propene)
c.
mc007-3.jpg (ethene)
 

 8. 
Which of the following can be used to represent the compound pentane?
a.
mc008-1.jpg
d.
mc008-4.jpg
b.
mc008-2.jpg
e.
all of the above
c.
mc008-3.jpg
 

 9. 
The first person to produce an organic compound synthetically was
a.
Dalton
d.
Kolbe
b.
Wohler
e.
none of the above
c.
Lemieux
 

 10. 
Which of the following is the general formula for alkanes?
a.
mc010-1.jpg
b.
mc010-2.jpg
c.
mc010-3.jpg
d.
mc010-4.jpg
e.
There is no general formula for alkanes.
 

 11. 
Organic compounds with molecular structures that are straight, branched chains, or rings of carbon-to-carbon bonds are most appropriately called
a.
aromatic compounds
d.
organic compounds
b.
hydrocarbon derivatives
e.
none of the above
c.
aliphatic compounds
 

 12. 
A family of hydrocarbons where each member differs from the previous one by a simple repeating group is called a(n)
a.
isomer series
d.
geometric series
b.
hydrocarbon series
e.
homologous series
c.
homogeneous series
 

 13. 
The molecular formula for heptane is
a.
mc013-1.jpg
d.
mc013-4.jpg
b.
mc013-2.jpg
e.
mc013-5.jpg
c.
mc013-3.jpg
 

 14. 
A complex mixture of hundreds of thousands of compounds, most of which are hydrocarbons with one to 40-carbon atoms per molecule is
a.
crude oil
d.
organic compounds
b.
petroleum
e.
none of the above
c.
natural gas
 

 15. 
Larger molecules of hydrocarbons are broken into two or more smaller hydrocarbon molecules by a process known as
a.
cracking
d.
reforming
b.
fractional distillation
e.
constructive distillation
c.
synthesis
 

 16. 
The general formula for an alkyl group is
a.
mc016-1.jpg
d.
mc016-4.jpg
b.
mc016-2.jpg
e.
mc016-5.jpg
c.
mc016-3.jpg
 

 17. 
The alkyl group that contains four carbons is known as
a.
butanyl
d.
propanyl
b.
butyl
e.
pentyl
c.
propyl
 

 18. 
Which of the following is not 2-methylpentane?
a.

mc018-1.jpg
d.

mc018-4.jpg
b.

mc018-2.jpg
e.

mc018-5.jpg
c.

mc018-3.jpg
 

 19. 
The IUPAC name for the following molecule is
mc019-1.jpg
a.
2,2-diethylpentane
d.
3-methyl-3-propylpentane
b.
3-methyl-2-ethylpentane
e.
3-ethyl-3-methylhexane
c.
3-methyl-2-ethylhexane
 

 20. 
The general formula for a cycloalkane is
a.
mc020-1.jpg
d.
mc020-4.jpg
b.
mc020-2.jpg
e.
none of the above
c.
mc020-3.jpg
 

 21. 
Alkanes and cycloalkanes are different because cycloalkanes
a.
contain double bonds
b.
contain two more hydrogens than the corresponding alkane
c.
contain two fewer hydrogens than the corresponding alkane
d.
have resonance structures that affect their formulas
e.
none of the above
 

 22. 
As the size of the chemical formula of an alkane increases, which of the following does not occur?
a.
The state of matter at SATP changes from gas to solid to liquid.
b.
The melting point increases.
c.
The boiling point decreases.
d.
The density increases.
e.
both a and c
 

 23. 
Alkanes do not dissolve in water because
a.
they are nonpolar
d.
they have very high boiling points
b.
they are polar
e.
of the shape of the molecules
c.
they have low boiling points
 

 24. 
What is the smallest member of the alkene family?
a.
methene
d.
butene
b.
ethene
e.
none of the above
c.
propene
 

 25. 
The following molecule is most appropriately named
mc025-1.jpg
a.
2-propene
d.
propane
b.
propene
e.
2-propyne
c.
propyne
 

 26. 
mc026-1.jpg is called
a.
2-butyne
d.
1-butyne
b.
3-butyne
e.
none of the above
c.
butyne
 



 
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