Organic Chemistry
Practice Test
1.
A system is said to be in ___________ when no net change in the amounts of reactants and products occurs.
a.
equilibrium
b.
state
c.
dislacement
d.
reverse
2.
Water forms drops because of its ________________.
a.
volume
b.
surface tension
c.
mass
d.
polarity
3.
____________ plastics harden permanently when molded.
a.
Polymer
b.
Monomer
c.
Thermosetting
d.
Thermoplastic
4.
Chemical bonding results in ________________.
a.
increased stability
b.
decreased stability
c.
longer bond lengths
d.
lower density
5.
What is the percent boron by mass in boric acid, H
3
BO
3
?
a.
17.50%
b.
38.00%
c.
22.10%
d.
45.30%
6.
Determine the number of atoms in 3.54 mol S.
a.
2.13 x 10 24
b.
1.70 x 10 24
c.
2.13 x 10 23
d.
1.70 x 10 23
7.
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.
density
b.
volume
c.
mass
d.
chemical behavior
8.
Water forms ______________ in a glass tube.
a.
a concave meniscus
b.
heavy water
c.
a convex meniscus
d.
hydrogen and oxygen
9.
These two types of plastics are easiest to collect and sort for recycling.
a.
PVC and PSEPS
b.
LDPE and PET
c.
PP and PVC
d.
PET and HDPE
10.
Alkanes with 20 or more carbon atoms are __________ at room temperature and pressure.
a.
liquids
b.
solids
c.
gases
d.
fluids
11.
How many hydrogen atoms are in one mole of hydrogen molecules?
a.
6.02 × 10
23
b.
2.02
c.
1.01
d.
12.04 × 10
23
12.
Two atoms that share six electrons are said to be joined by a __________ bond.
a.
hexyl
b.
triple
c.
single
d.
double
13.
Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCl.
a.
6.2
b.
0.015 M
c.
0.75 M
d.
1.1 M
14.
The empirical formula for a compound is CH and its molar mass is 78 g/mol. What is the compound's molecular formula?
a.
C
10
H
10
b.
C
3
H
3
c.
C
6
H
6
d.
CH
15.
Changes in an equilibrium system can be described according to _____________ principle.
a.
Rutherford's
b.
Boyle's
c.
Le Chatelier's
d.
Dalton's
16.
Atoms that share electrons form __________ bonds.
a.
quartets
b.
covalent
c.
quantitative
d.
ionic
17.
The general formula for an amine is __________.
a.
ROR'
b.
ROH
c.
RNH2
d.
RX
18.
Which of these compounds may be an alkene?
a.
C
6
H
14
b.
C
2
H
6
c.
C
22
H
46
d.
C
4
H
8
19.
The type of analysis based on the movements of a stationary phase and a mobile phase is called _____________.
a.
phase movement
b.
photography
c.
titration
d.
chromatography
20.
How many grams of NaCl are dissolved in 500.0 mL of a 0.05M solution of NaCl?
a.
2.92 g
b.
0.05 g
c.
0.29 g
d.
1.46 g
