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IB Chemistry Topics 4 & 14 Review

Total questions: 50

Worksheet time: 13hrs 30mins

Name
Class
Date
1.

How many sigma bonds are in the following molecule?

a)

0

b)

1

c)

2

d)

5

e)

6

2.

How many pi bonds are in the following compound?

a)

0

b)

1

c)

2

d)

3

e)

5

3.

How many pi bonds are in the following compound?

a)

0

b)

1

c)

2

d)

4

4.

How many sigma bonds are in the following molecule?

a)

0

b)

4

c)

8

d)

12

e)

16

5.

How many pi bonds are in the following compound?

a)

0

b)

1

c)

2

d)

4

6.

ALL covalent bonds contain 1 sigma bond.

a)

true

b)

false

7.

ALL covalent bonds contain 1 pi bond.

a)

true

b)

false

8.

A double bond contains 1 pi bond and 1 sigma bond.

a)

true

b)

false

9.

A triple bond contains 2 sigma and 1 pi bonds.

a)

True

b)

False

10.

A triple bond contains 1 sigma and 2 pi bonds.

a)

True

b)

False

11.
What element has the following electron configuration? [Ar] 3d104s24p3
a)
As
b)
P
c)
Se
d)
Ga
12.
In a stable atom, the atomic number is equal to...
a)
neutrons
b)
electrons
c)
atomic mass
d)
what is a stable atom?
13.
1.  What is the shape of an s orbital?
a)
sphere
b)
dumbbell
c)
double dumbbell
d)
TOO COMPLEX TO KNOW IT.
14.
How many electrons can each p orbital hold?
a)
6
b)
3
c)
2
d)
4
15.
Which is associated with more energy? 
a)
2p
b)
2s
c)
3p
d)
1s
16.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Linear
17.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Linear
18.
Choose the correct shape for this molecule:
a)
Bent
b)
Trigonal pyramidal
c)
Trigonal planar
d)
Linear
19.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
20.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
21.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
22.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

23.

According to Valence Shell Electron Pair Repulsion (VSEPR) theory,

a)

valence electrons on connected atoms repel each other.

b)

valence electron orbitals overlap and those electrons move freely among the atoms.

c)

valence electrons are transferred from one or more atoms to other atoms.

d)

valence electrons are removed in order to make the molecule more stable.

24.

How many electron groups are on the central atom of SO2?

a)

0

b)

1

c)

2

d)

3

25.

What is the Valence Shell Electron Pair Repulsion (VSEPR) structure for NH3?

a)

AX3

b)

AE3

c)

AX3E

d)

A3XE

26.

What is the electron geometry for the SCl4 molecule?

a)

Octahedral

b)

Trigonal Planar

c)

Tetrahedral

d)

Trigonal Bipyramid

27.

How many bond dipoles are there in the SO3 molecule?

a)

0

b)

1

c)

2

d)

3

28.

Which species does not contain delocalized electrons?

a)

CH3CH2O–

b)

CH3CO2–

c)

O3

d)

NO3-

29.

How many sigma and pi bonds are present in propyne, CH3CCH?

a)

5 sigma, 3 pi

b)

6 sigma, 2 pi

c)

7 sigma, 1 pi

d)

8 sigma, 0 pi

30.

In which compound are all the carbon atoms sp2 hybridized?

a)
b)
c)

CH2CHCH3

d)

CH3CH2CHCHCH2CH3

31.

Which statement about sigma and pi bonds is correct?

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II, and III

32.

The Lewis structure of XeF2 contains two bonding pairs of electrons and three non-bonding pairs of electrons (lone pairs) around the central xenon atom. What is the shape of XeF2 molecule?

a)

bent

b)

trigonal bipyramidal

c)

square planar

d)

linear

33.

Which molecule has an octahedral shape?

a)

SF6

b)

PCl5

c)

XeF4

d)

BF3

34.

Which species have delocalized electrons?

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II, and III

35.

How many bonding pairs and lone pairs of electrons surround the sulfur atom in the SF4 molecule?

a)

4 bonding pairs, 1 lone pair

b)

4 bonding pairs, 0 lone pairs

c)

6 bonding pairs, 0 lone pairs

d)

8 bonding pairs, 2 lone pairs

36.

Which of the following best describes the formation of π bonds?

a)

They are formed by the sideways overlap of parallel orbitals.

b)

They are formed by the axial overlap of orbitals.

c)

They are formed by the sideways overlap of an s and p orbital.

d)

They are formed by the axial overlap of either s or p orbitals.

37.

What is the hybridization of the carbon atom, the number of sigma bonds, and the number of pi bonds in a methanal molecule?

a)

sp2, 3 sigma, 1 pi

b)

sp3, 3 sigma, 1 pi

c)

sp3, 4 sigma, 0 pi

d)

sp2, 4 sigma, 0 pi

38.

What is the type of hybridization of the silicon and oxygen atoms in silicon dioxide?

a)

Si: sp3, O: sp3

b)

Si: sp3, O: sp2

c)

Si: sp2, O: sp3

d)

Si: sp2, O: sp2

39.
What makes a molecule polar?
a)
Equal sharing of valence electrons
b)
Unequal sharing of valence electrons
c)
Stealing of electrons
d)
Temporary charges that come and go
40.
CO2 is an example of a(n) _____ bond.
a)
covalent
b)
adhesive
c)
ionic
d)
cohesive
41.
LiF is an example of a(n) _____ bond.
a)
covalent
b)
adhesive
c)
ionic
d)
cohesive
42.
Ionically bonded compounds are made of atoms that 
a)
share electrons
b)
shoot their electrons out into space
c)
move their electrons to the nucleus of the atom
d)
give electrons to and accept electrons from each other
43.
Covalently bonded molecules are made of atoms that
a)
share electorns
b)
shoot their electrons out into space
c)
move their electrons to the nucleus of the atom
d)
give electrons to and accept electrons from each other
44.
Define the term resonance structure
a)
Delocalization of electrons in an atom
b)
Delocalization of π electrons within a molecule
c)
Spread of π electrons in an atom
d)
Spread of π electrons within a molecule
45.
For carbonate ions, how many resonance structures can be drawn ?
a)
2
b)
3
c)
4
d)
5
46.
For carbonate ions, what is the bond strength between C and O
a)
C-O (single bond)
b)
C=O (double bond)
c)
C≡O (triple bond)
d)
C-O(between single and double bond)
47.
How many resonance structures for NO3- ion?
a)
1
b)
2
c)
3
d)
4
48.
How many resonance structure for SO2 ?
a)
1
b)
2
c)
3
d)
4
49.
How many resonance structures for CH3COO- ion?
a)
1
b)
2
c)
3
d)
4
50.
What types of C-C bonds are found in benzene molecules?
a)
C-C (single bonds)
b)
C-C and C=C (single and double bonds)
c)
3 C-C (single bond) and 3 C=C (double bond)
d)
None of the above

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