IB CHEMISTRY: TOPIC 4/14 REVIEW (MULTIPLE CHOICE)
1.
Which compound contains both ionic and covalent bonds?
A. CuSO4
2.
B. HCl
C. MgBr2
D.
H2CO
Which of the following molecules are polar?
I. SO2
II. CH3Cl
A. I and II only
B. II and III only
III. NH3
IV. C2H6
C. I, II and III only
D. all of these are polar
3.
Consider the following statements.
I.
II.
2–
All carbon-oxygen bond lengths are equal in CO3 .
All nitrogen-oxygen bond lengths are equal in NO2-.
III.
–
All carbon-oxygen bond lengths are equal in CH3COO .
Which statements are correct?
A.
B.
C.
D.
4.
I and III only
I and II only
II and III only
I, II and III
What is the number of sigma () and pi () bonds and the hybridization of the carbon atom in
O
H
5.
A.
Sigma
4
Pi
1
B.
4
1
C.
3
2
D.
3
1
II. Metallic bonding
a) I only
b) II only
c) I, II and III only
H
Hybridization
3
sp
2
sp
3
sp
2
sp
III. Hydrogen bonding
IV. Covalent
d) I, III and IV only
e) I and II only
Ethanol (C2H5OH) is a molecular covalent compound. When pure ethanol boils the gas evolved consists of:
A. water and ethanol
B. ethanol only
7.
O
What type of bonding exists in a sample of chromium?
I. London
6.
C
C. mixture of carbon dioxide and water
D. carbon, hydrogen and water
What intermolecular forces are present in a sample of liquid oxygen, O 2(l)?
I. Dipole-Dipole
a) I only
b) II only
c) I and II only
II. van der Waals
III. Hydrogen bonding
d) I and IV only
e) I and III only
IV. Covalent
8.
What type of solid materials are typically soft, have low melting points and poor electrical conductivities?
I.
II.
III.
A.
B.
9.
I and II only
I and III only
A.
B.
C.
D.
II and III only
I, II and III
hydrogen  covalent  van der Waals
van der Waals  hydrogen  covalent
covalent  hydrogen  van der Waals
covalent  van der Waals  hydrogen
C.
D.
Each oxygen atom gains one electron.
Each oxygen atom loses one electron.
C.
D.
Each sodium atom gains one electron.
Each sodium atom loses one electron.
Which statement best describes the attraction present in metallic bonding?
A.
B.
13.
I and II only
I and III only
What happens when sodium and oxygen combine together?
A.
B.
12.
Al2O3(s)
SiO2(s)
Si(s)
When the following bond types are listed in decreasing order of strength (strongest first), what is the correct order?
A.
B.
11.
C. II and III only
D. III only
Which of the following are covalent network solids?
I.
II.
III.
10.
Ionic
Metallic
Molecular
the attraction between positive ions and electrons
the attraction between nuclei and electrons
C.
D.
the attraction between positive ions and negative ions
the attraction between protons and electrons
Which of the following contain a bond angle of 90°?
+
I.
PC14
II.
PCl5
–
III.
PCl6
A.
B.
I and II only
II and III only
C. I and III only
D.
I, II and III
14. When the substances below are arranged in order of increasing carbon-carbon bond length (shortest bond first), what
is the correct order?
I. H2CCH2
A. I < II < III
15.
B. I < III < II
III. C6H6 (benzene)
C. II < I < III
D. III < II < I
The compounds listed have very similar molar masses. Which has the strongest intermolecular forces?
A.
B.
16.
II. H3CCH3
CH3CH2NH2
CH3CHO
C.
D.
CH3CH2F
CH3CH2CH3
Which substance has the lowest electrical conductivity?
A.
B.
KCl(s)
Ni(l)
C.
D.
C(graphite)
LiOH(aq)
17.
Which molecule has the largest bond angle?
A.
18.
B.
NH3
C.
CH4
D.
SO2
Which types of hybridization are shown by the carbon atoms in the compound CH 2 = CHCH3?
A.
B.
19.
BF3
I.
sp
II.
sp
III.
sp
2
3
I and III only
I and II only
C.
D.
II and III only
I, II and III
Which molecule is square planar in shape?
A.
XeO4
B. XeF4
C. SF4
D.
SiF4
20. Which of the following species is considered to involve sp 3 hybridization?
I. OF2
A. I only
21.
II. CH4
B. I and II only
III. NCl3
C. I, II and III
D. II and III only
How many sigma (σ) and pi (π) bonds are present in the structure of HCN?
σ
3
2
2
1
A.
B.
C.
D.
π
1
3
2
3
22. Which of the following molecules does not possess delocalized pi bonding?
A. CH3COO23.
B. CH2=CH2
C. NO3-
2
Which allotropes contain carbon atoms with sp hybridization?
I.
II.
III.
Diamond
Graphite
C60 fullerene
A.
B.
I and II only
I and III only
24.
Which statement about sigma and pi bonds is correct?
A.
B.
C.
D.
Sigma bonds are formed only by s orbitals and pi bonds are formed only by p orbitals.
Sigma bonds are formed only by p orbitals and pi bonds are formed only by s orbitals.
Sigma bonds are formed by either s or p orbitals, pi bonds are formed only by p orbitals.
Sigma and pi bonds are formed by either s or p orbitals.
25.
–
Which statements correctly describe the NO2 ion?
I.
II.
C.
D.
II and III only
I, II and III
III.
It can be represented by resonance structures.
It has two lone pairs of electrons on the N atom.
2
The N atom is sp hybridized.
A.
B.
I and II only
I and III only
C.
D.
II and III only
I, II and III
D. CO32-