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