WorksheetsBruice 8th Ed Chapter 1 MCQ from Test Bank
Total questions: 55
Worksheet time: 28mins
Name
Class
Date
1.
Which of the following elements does this electronic configuration represent? 1s2 2s2 2p5
a)
F
b)
C
c)
N
d)
Al
e)
O
2.
How many unpaired electrons are present in the isolated carbon atom (atomic number = 6)?
a)
none
b)
one
c)
two
d)
three
e)
four
3.
Which of the following is the electronic configuration of the element Fe?
a)
1s2 2s2 2p6 3s2 3p6 4s2 3d6
b)
1s2 2s2 2p6 3s2 3p8 3d6
c)
1s2 2s2 2p8 3s2 3p6 4s2 3d6
d)
1s2 2s2 2p6 3s2 3p6 4s2 4d6
e)
1s2 2s2 2p6 3s2 3p6 4s2 4p6
4.
The atomic number of boron is 5. The correct electronic configuration of boron is
a)
1s2 2s3.
b)
1s2 2p3.
c)
1s2 2s2 2p1.
d)
2s2 2p3.
e)
1s2 2s2 3s1.
5.
Which of the following statements correctly describes the third electron shell that surrounds the nucleus of an atom?
a)
The third shell contains only s and p atomic orbitals.
b)
The maximum number of electrons that can occupy the third shell is 18.
c)
The total number of atomic orbitals present in the third shell is 16.
d)
The third shell can contain f orbitals.
e)
All third shell elements must have d electrons.
6.
Give the electronic configuration for N-3.
a)
1s22s2
b)
1s22s22p3
c)
1s22s22p4
d)
1s22s22p6
e)
1s22s22p63s1
7.
Identify the least electronegative atom.
a)
P
b)
Na
c)
I
d)
B
e)
O
8.
Give the number of nonbonding lone pairs of electrons in H2NOH.
a)
0
b)
1
c)
2
d)
3
e)
4
9.
The compound methylamine, CH3NH2, contains a C-N bond. In this bond, which of the following best describes the charge on the nitrogen atom?
a)
1
b)
slightly positive
c)
uncharged
d)
slightly negative
e)
-1
10.
Which of the compounds below have bonds that are predominantly ionic?
a)
KCl
b)
CF4
c)
NH3
d)
both A and B
e)
both B and C
11.
What type of bonding is most important in CH3CH2CH2CH2CH2CH3?
a)
ionic
b)
hydrogen
c)
covalent
d)
polar
12.
Which of the following contain(s) polar covalent bonds?
a)
NH3
b)
Na2O
c)
H2
d)
KF
e)
both A and C
13.
Which of the following covalent bonds has the largest dipole moment?
a)
C-C
b)
C-H
c)
C-O
d)
H-N
e)
H-F
14.
The formal charge on nitrogen in the compound below is
a)
2
b)
1
c)
0
d)
-1
e)
-2
15.
Which of the following is the most likely electronic structure for C2H2?
a)
H—C C—H
b)
DUMMY
16.
Which of the following structures, including formal charges, is correct for diazomethane, CH2N2?
a)
: CH2—N N :
b)
DUMMY
17.
What are the formal charges on nitrogen and the starred oxygen atom in the following molecule?
a)
N = -1, O = 0
b)
N = +1, O = -1
c)
N = +1, O = +1
d)
N = -1, O = -1
e)
N= +1, O = 0
18.
Give the formal charge on nitrogen in NH4.
a)
-2
b)
-1
c)
0
d)
1
e)
2
19.
How many distinct and degenerate p orbitals exist in the second electron shell, where n = 2?
a)
0
b)
1
c)
2
d)
3
e)
4
20.
Consider the interaction of two hydrogen 1s atomic orbitals of the same phase. Which of the statements below is an incorrect description of this interaction?
a)
A sigma bonding molecular orbital is formed.
b)
The molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital.
c)
The molecular orbital formed has a node between the atoms.
d)
The molecular orbital formed is cylindrically symmetric.
e)
A maximum of two electrons may occupy the molecular orbital formed.
21.
Choose the correct hybridization for the atom indicated in the molecule below. CH3CH2CH2CH3 ↑
a)
sp
b)
sp2
c)
sp3
d)
none of the above
22.
How many carbon-carbon sigma bonds are in the molecule shown?
a)
1
b)
2
c)
3
d)
4
23.
A molecule of acetonitrile CH3CN contains ________ sigma bonds and ________ pi bonds.
a)
5, 2
b)
4, 3
c)
4, 2
d)
2, 2
e)
4, 0
24.
Which carbon(s) in the following molecule is (are) sp hybridized?
a)
carbon 1
b)
carbon 2
c)
carbons 1, 3
d)
carbons 4
e)
carbons 4, 5
25.
Determine the number of pi bonds in CH3CN.
a)
0
b)
1
c)
2
d)
3
e)
4
26.
How many sp2 hybridized carbons are present in allene (H2C=C=CH2)?
a)
0
b)
1
c)
1.5
d)
2
e)
3
27.
What orbitals overlap to create the C-H bond in ethene (H2C=CH2)?
a)
s-sp
b)
s-sp2
c)
s-sp3
d)
s-p
e)
p-p
28.
What is the predicted shape, bond angle, and hybridization for +CH3?
a)
trigonal planar, 120°, sp2
b)
trigonal planar, 120°, sp3
c)
trigonal planar, 109.5°, sp2
d)
trigonal pyramidal, 120°, sp2
e)
trigonal pyramidal, 109.5°, sp2
29.
What orbitals overlap to create the H-C bond in CH3+?
a)
sp3-sp3
b)
sp2-sp3
c)
s-p
d)
s-sp2
e)
s-sp3
30.
The lone-pair electrons of the methyl anion occupy a(n) ________ orbital.
a)
s
b)
p
c)
sp
d)
sp2
e)
sp3
31.
Give the shape of the methyl radical.
a)
trigonal pyramidal
b)
tetrahedral
c)
bent
d)
linear
e)
trigonal planar
32.
The N-H single bond in methyl amine (CH3NH2) is a ________ bond formed by the overlap of a(n) ________ orbital on N and a(n) ________ orbital on H.
a)
σ; sp2; s
b)
σ ; sp3; s
c)
π ; sp3; s
d)
π ; sp2; p
e)
π ; p ; p
33.
Triethylamine [(CH3CH2)3N] is a molecule in which the nitrogen atom is ________ hybridized and the CNC bond angle is ________.
a)
sp2, >109.5°
b)
sp2, <109.5°
c)
sp3, >109.5°
d)
sp3, <109.5°
e)
sp, 109.5°
34.
The N-H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals?
a)
sp3-sp3
b)
sp3-sp2
c)
sp2-sp2
d)
sp2-s
e)
sp3-s
35.
Which of the following is closest to the C-O-C bond angle in CH3-O-CH3?
a)
180°
b)
120°
c)
109.5°
d)
90°
e)
160°
36.
Each lone pair of electrons on the O atom in methanol (CH3OH) occupies a(n) ________ orbital.
a)
s
b)
p
c)
sp
d)
sp2
e)
sp3
37.
Among the hydrogen halides, the strongest bond is found in ________ and the longest bond is found in ________.
a)
HF, HF
b)
HF, HI
c)
HI, HF
d)
HI, HI
e)
HCl, HBr
38.
The hydrogen-halogen bond becomes ________ and ________ as the size (atomic weight) of the halogen increases.
a)
longer, weaker
b)
longer, stronger
c)
shorter, weaker
d)
shorter, stronger
39.
Which bond in the following molecule is the shortest?
a)
bond 1
b)
bond 2
c)
bond 3
d)
bond 4
e)
bond 5
40.
Which of the following species have tetrahedral bond angles?
a)
A, D and E
b)
A, D, E and F
c)
A and E
d)
D only
e)
A, B and E
41.
The carbon-carbon double bond in ethene is ________ and ________ than the carbon-carbon triple bond in ethyne.
a)
stronger; shorter
b)
stronger; longer
c)
weaker; shorter
d)
weaker; longer
e)
stronger; more polar
42.
What is the CNN bond angle in the compound shown below?
a)
~60°
b)
~90°
c)
~110°
d)
~120°
e)
~180°
43.
Identify the hybridization of carbon in H2CO.
a)
sp
b)
sp2
c)
sp3
d)
sp4
e)
s3p
44.
Give the H-C-H bond angle in H2CO.
a)
60
b)
90
c)
109.5
d)
120
e)
180
45.
Identify the hybridization of the oxygen in CH3OCH3.
a)
sp
b)
sp2
c)
sp3
d)
sp4
e)
sp5
46.
Identify the compound with the weakest bond.
a)
H2
b)
HF
c)
HCl
d)
HBr
e)
HI
47.
In what type of orbital are the lone pair electrons of methoxide (CH3O-) found ?
a)
s
b)
p
c)
sp
d)
sp2
e)
sp3
48.
Which of the following molecules does not exhibit a net dipole moment of zero?
a)
CO2
b)
CH4
c)
CCl4
d)
H2O
e)
SO3
49.
Which of the following molecules has the smallest dipole moment?
a)
Br2
b)
NH3
c)
HCl
d)
HBr
e)
HI
50.
Identify the compound(s) that have a nonzero dipole moment. You may choose more than one answer.
a)
CH3NH2
b)
CO2
c)
CH3OCH3
d)
(CH3)2C C(CH3)2
e)
BCl3
51.
Convert the model below into skeletal structure.
a)
I
b)
II
c)
III
d)
IV
e)
V
52.
Propanal is a compound detected on the surface of comet 67P by the Philae Lander. How many hydrogen atoms are present at the indicated carbon?
a)
0
b)
1
c)
2
d)
3
e)
4
53.
The lobes of the p-orbital are often designated by "+" and "-" signs as shown. What do these signs represent?
a)
opposite charges
b)
phases of the orbital
c)
positive indicates the location of protons and negative indicates the location of electrons
d)
that the orbital has polarity
e)
all of the above
54.
The structure of a widely used anesthetic propofol is given below. How many sp3 hybridized atoms are in this molecule?
a)
1
b)
3
c)
5
d)
6
e)
9
55.
Propanal is a compound detected on the surface of comet 67P by the Philae Lander. How many atoms sp2 hybridized atoms are in this molecule?
a)
0
b)
1
c)
2
d)
3
e)
4
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