Honors Chemistry I
Chemical Bonding Practice Test
E
Which of the following substances contains polar bonds, but is a nonpolar molecule?
A) water;
B) carbon monoxide; C) ammonia;
D) hydrogen chloride;
E) SO3
B
Which of the following compounds contain a multiple bond?
A) water;
B) carbon monoxide;
C) ammonia (NH3);
E) phosphorus trichloride
D) hydrogen chloride;
H
B
How many pi bonds exist in ethene if it has the following structural formula:
A) none;
B) 1;
C) 2;
D) 3;
E) 5;
F) 6
H
\
/
C=C
/
\
H
H
Using the following key, identify the type of bond that exists within the substance (intramolecular force):
(A) pure covalent; (B) nonpolar covalent; (C) polar covalent; (D) dipole-dipole;
(E) ionic; (F) dative, or coordinate covalent; (G) metallic.
A
liquid bromine
B
methane – CH4
E
solid sodium bromide
G
liquid mercury
E
solid manganese (II) iodide
C
PCl3
F
H ion bonding with ammonia
B
hydrogen selenide gas
+
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F
Which of the following species exhibits resonance:
A) CO;
B) CO2;
C) SO3;
D) SO2;
G) C, D, and E all exhibit resonance.
-2
E) SO4 ;
F) both C and D;
B
What type of hybridization is exhibited in the boron trifluoride molecule?
2
3
2 3
3
3 2
A) sp;
B) sp ;
C) sp ;
D) s p ;
E) sp d;
F) sp d .
B
Which of the following substances exhibits the smallest amount of ionic character in the
intramolecular bonding? A) water (1.34); B) carbon monoxide (0.89); C) ammonia (0.94);
D) hydrogen chloride (1.06); E) phosphorus trichloride (0.97)
A
Which of the following is a saturated hydrocarbon?
A) ethane; B) ethene; C) ethyne; D) 2-butene;
E) benzene;
F) both A and C.
D
Which of the following species would be predicted to be paramagnetic?
+2
A) neutral neon atom; B) Ca ion; C) neutral calcium atom; D) neutral potassium atom.
MgCl2
What would be the predicted formula for a compound of magnesium and chlorine?
-2A
The bonds between sodium and the phosphate ion in Na3PO4 would be:
A) ionic; B) covalent; C) metallic; D) hybrid; E) van der Waals.
19-21. Show the Lewis dot diagram for the following species: sulfate ion, sulfur dioxide molecule, and the
sulfur trioxide molecule. Be sure to indicate the proper notation for ionic species.
sulfate ion
..
sulfur dioxide
..
:O :
-2
:O:
..
|
..
:O: S:O:
..
sulfur trioxide
| ..
:O:
..
:O :
..
:O :
||
|
S
|
:O :
<==>
S
||
:O :
..
|
..
:O - S = O
..
..
..
..
:O:
:O:
<==> .. || ..
.. |
:O - S = O:
:O - S - O:
..
..
..
..
22-23. Compare and contrast the bond length of the sulfur-oxygen bond within each of the three species from
the above question.
Bond Length for S-O single bond in Sulfate is longest
Bond Length for S-O bond in SO3 is a little shorter than a single bond, but longer than a
double bond (about 1/3), so it is the middle bond in strength.
Bond Length for S-O bond in SO2 is about half-way between a single and a double bond in length,
so it is the longest.
24-25. Compare and contrast the bond strength of the sulfur-oxygen bond in the same three species.
Bond Strength for S-O single bond in Sulfate is weakest
Bond Strength for S-O bond in SO3 is a little stronger than a single bond,
but still much weaker than a double bond in strength, so it is the middle bond in strength.
Bond Strength for S-O bond in SO2 is about half-way between a single and a double bond
in strength, so it is the strongest.
SO2 and SO3
sp3
B
Which species exhibit pi bonding?
What type of hybridization is exhibited in the sulfate ion?
What is the formal charge of sulfur in sulfur dioxide?
A) 0; B) +1;
C) -1;
D) -2;
E) +2;
F) +6
-3D
Which of the following is least likely to show ionic bonding?
A) KF;
B) SnCl2;
C) ZnCl2;
D) S2Cl2;
E) ScCl3.
Using the following key, identify the type of intermolecular force between molecules (species):
(A) London dispersion force; (B) ionic; (C) covalent (network); (D) hydrogen;
(E) dipoledipole;
(F) dipole-ion;
(G) ion-induced dipole;
(H) metallic;
(I) dipole-induced dipole.
H
brass - an alloy of copper and zinc
B
KCl crystals
F
MgCl2 dissolved in water
A
He
A
N2 gas
D
NH3
E
mixture of HBr in water
C
diamond
B
calcium nitrate crystals
H
liquid cesium at 40 C
o
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[Ar]3d5
Give the noble gas core configuration for the ferric ion.
E
An atom with a high electronegativity generally has a:
A) low electron affinity; B) small atomic radius;
C) large atomic number;
D) tendency to form cations;
E) high ionization potential.
C
In which of the compounds do ALL atoms obey the octet rule?
A) NO;
B) PF5;
C) PF3;
D) BF3;
E) NaH.