Chemical Bonding
Practice Test
1.
What is the wavelength of an object moving at 19.4 m/s and having a mass of 1000 kg?
a.
3.4 x 10 -38 m
b.
34 m
c.
1.3 x 10 -38 m
d.
3.4 x 10 -34 m
2.
What is the name of the molecular compound NO
2
?
a.
dinitrogen dioxide
b.
nitrogen dioxide
c.
nitrogen dioxygen
d.
nitrite
3.
Molten sodium chloride conducts electricity because ______________________.
a.
solid sodium conducts, too
b.
the chlorine atoms carry a charge
c.
chlorine gas escapes
d.
the ions are free to move
4.
Changes in energy, color, and odor are indications that a _____________ has taken place.
a.
chemical reaction
b.
separation reaction
c.
precipitation reaction
d.
displacement reaction
5.
A compound that conducts electricity when melted or dissolved in water is an _____________.
a.
electron
b.
electrolyte
c.
molecule
d.
hydrocarbon
6.
An intermediate difference in electronegativity results in a/an ___________________ bond.
a.
polar covalent
b.
ionic
c.
weak
d.
covalent
7.
Changes in an equilibrium system can be described according to _____________ principle.
a.
Rutherford's
b.
Boyle's
c.
Le Chatelier's
d.
Dalton's
8.
These interact when atoms react.
a.
neutrons
b.
valence electrons
c.
only s-sublevel electrons
d.
inner-level electrons
9.
A reaction between magnesium chloride and silver nitrate yields magnesium nitrate and silver chloride. What is the coefficient for magnesium nitrate in the balanced equation for the reaction?
a.
2
b.
4
c.
3
d.
1
10.
Green plants take in this gas and give off oxygen during photosynthesis.
a.
ammonia
b.
hydrogen
c.
carbon dioxide
d.
nitrogen
11.
A chemical bond that results from a shared pool of valence electrons is called a ____________ bond.
a.
metallic
b.
directional
c.
polar covalent
d.
ionic
12.
This isotope is often used to date prehistoric fossils.
a.
oxygen-16
b.
calcium-40
c.
uranium-235
d.
carbon-14
13.
What is the oxidation number of Group 17 nonmetals?
a.
3
b.
0
c.
-1
d.
1
14.
Reactions that can occur in either direction are said to be ____________.
a.
limited
b.
backward
c.
forward
d.
reversible
15.
The formula for a covalent compound is called a _______________.
a.
covalent code
b.
macromolecule
c.
covalent formula
d.
molecular formula
16.
In general, electronegativity ___________ atomic number within a period.
a.
decreases with
b.
is inversely proportional to
c.
increases with
d.
remains constant with
17.
Diatomic oxygen and ozone are _____________.
a.
different elements
b.
ionic
c.
isotopes
d.
allotropes
18.
What type of reaction is represented by the equation Pb(NO
3
)
2
+ K
2
CrO
4
PbCrO
4
+ 2KNO
3
?
a.
single displacement
b.
decomposition
c.
synthesis
d.
double displacement
19.
A ____________ reaction is one in which a compound breaks down into two or more simpler substances.
a.
decomposition
b.
synthesis
c.
replacement
d.
photosynthesis
20.
The arrangement of electron pairs around each of the two carbon atoms in the ethene molecule, C
2
H
4
, is best described as _________________.
a.
tetrahedral
b.
linear
c.
square planar
d.
trigonal planar
