Organic Chemistry
Practice Test
1.
Which of these compounds may be an alkene?
a.
C
22
H
46
b.
C
6
H
14
c.
C
4
H
8
d.
C
2
H
6
2.
Ethylene monomers form polyethylene in a process known as ___________________.
a.
addition polymerization
b.
ionic bonding
c.
condensation
d.
condensation polymerization
3.
The structure of 3-ethylpentane is best described as _____________________________.
a.
a five-carbon chain with a two-carbon attachment on the third carbon of the chain
b.
a three-carbon chain with a five-carbon attachment on the third carbon of the chain
c.
a five-carbon ring with a two-carbon attachment on the third carbon of the ring
d.
a five-carbon chain with a one-carbon attachment on the third carbon of the chain
4.
The smallest cycloalkane has __________ carbon atoms.
a.
one
b.
two
c.
six
d.
three
5.
Organic compounds include most compounds that contain the element _____________.
a.
silicon
b.
nitrogen
c.
iodine
d.
carbon
6.
The general formula for an amine is __________.
a.
RX
b.
ROH
c.
ROR'
d.
RNH2
7.
Petroleum is separated into different mixtures of hydrocarbons, such as gasoline and kerosene, by ________________.
a.
electrolysis
b.
osmosis
c.
chromatography
d.
fractional distillation
8.
Large alkanes are converted into smaller, more useful alkanes and alkenes by a process known as ___________.
a.
condensation
b.
cracking
c.
concentration
d.
combustion
9.
These two types of plastics are easiest to collect and sort for recycling.
a.
PVC and PSEPS
b.
PP and PVC
c.
PET and HDPE
d.
LDPE and PET
10.
________________ have the prefixes cis- and trans-.
a.
Geometric isomers
b.
Structural isomers
c.
Di- and Tri- isomers
d.
Stereoisomers
11.
What is the product of the addition polymerization of ethene?
a.
nylon
b.
PVC
c.
Kevlar
d.
polyethylene
12.
A large molecule made up of many smaller, repeating units is called a _____________.
a.
monomer
b.
ketone
c.
wax
d.
polymer
13.
How do structural isomers differ from stereoisomers?
a.
Stereoisomers have different chemical and physical properties; structural isomers have the same chemical and physical propeties.
b.
Structural isomers' atoms are bonded in different orders; stereoisomers' atoms are bonded in the same order.
c.
Structural isomers have different formulas; stereoisomers have the same formula.
d.
Structural isomers' atoms are bonded in the same order; stereoisomers' atoms are bonded in different orders.
14.
Hydrocarbons with __________ carbon atoms will be collected at the highest point on a fractionating tower.
a.
12
b.
4
c.
8
d.
20
15.
The structural formula -C=C- indicates a ___________ bond between the carbon atoms.
a.
single covalent
b.
double ionic
c.
single ionic
d.
double covalent
16.
These types of organic compounds have strong aromas, are volatile, and are used in artificial flavorings and fragrances.
a.
aldehydes
b.
esters
c.
ethers
d.
alkynes
17.
A functional group is the part of a molecule having a specific arrangement of atoms that is largely responsible for the _______________ of the parent molecule.
a.
volume
b.
chemical behavior
c.
density
d.
mass
18.
What is the monomer in the natural polymer known as cellulose?
a.
ribose
b.
methanol
c.
glucose
d.
sucrose
19.
Hydrocarbons in which all the carbon atoms are connected by single bonds are _______________.
a.
saturated hydrocarbons
b.
alkenes
c.
unsaturated hydrocarbons
d.
alkynes
20.
What is the difference between an aldehyde and a ketone?
a.
Aldehydes have carbonyl groups at the end of a carbon chain; ketones have carbonyl groups within carbon chains.
b.
Aldehydes have carboxyl groups; ketones have carbonyl groups.
c.
Aldehydes have carboxyl groups at the end of a carbon chain; ketones have carboxyl groups within carbon chains.
d.
Aldehydes have carbonyl groups; ketones have carboxyl groups.
21.
______________ gives additional strength to a polymer.
a.
Cross-linking
b.
Single bonding
c.
Ionic bonding
d.
Boiling
22.
____________ plastics harden permanently when molded.
a.
Monomer
b.
Polymer
c.
Thermoplastic
d.
Thermosetting
23.
Alkanes with 20 or more carbon atoms are __________ at room temperature and pressure.
a.
gases
b.
fluids
c.
liquids
d.
solids
24.
What type of organic compound is characterized by a hydroxy functional group bonded to a carbon atom of a hydrocarbon?
a.
octane
b.
carbon dioxide
c.
an alcohol
d.
an aldehyde
25.
The prefix "cyclo" indicates that a hydrocarbon contains a carbon ____________.
a.
carbon ring
b.
carbon branch
c.
carbon atom
d.
carbon chain
26.
What is the shape of the benzene molecule?
a.
tetrahedral
b.
hexagonal planar
c.
octahedral
d.
trigonal pyramidal
27.
An unsaturated hydrocarbon has one or more ______________carbon-carbon bonds.
a.
double
b.
triple
c.
double or triple
d.
single
28.
What is the name of the alkene with the formula CH
3
CH=CHCH
2
CH
3
?
a.
2-methyl-1-butene
b.
hexene
c.
2-pentene
d.
1-pentene
