Deck 10: Molecular Structure and Bonding Theories

Question 1

What bonded atom lone pair arrangement is predicted by VSEPR theory for the electron groups that surround the carbon atom in CO₂?

A) Linear
B) Trigonal planar
C) Bent
D) Tetrahedral
E) Trigonal pyramidal

Answer 1

Linear

Question 2

What is the steric number with respect to the central iodine atom in the Lewis structure for the species, IF₄^{1 -} ?

A) 2
B) 3
C) 4
D) 5
E) 6

Answer 2

6

Question 3

What is the bonded atom lone pair arrangement with respect to the electrons around the central bromine atom in the ion BrO₃^{1 -} ?

A) Linear
B) Trigonal planar
C) Tetrahedral
D) Trigonal bipyramidal
E) Octahedral

Answer 3

Tetrahedral

Question 4

What is the steric number with respect to the central nitrogen atom in the Lewis structure for ammonia, NH₃?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 5

What is the steric number with respect to the central oxygen atom in the Lewis structure for ozone, O₃?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 6

What bonded atom lone pair arrangement is predicted by VSEPR theory for the electron groups that surround the nitrogen atom in NH₃?

A) Linear
B) Trigonal planar
C) Bent
D) Tetrahedral
E) Trigonal pyramidal

Question 7

What is the steric number with respect to the central iodine atom in the Lewis structure for the species, ICl₂^{1 -} ?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 8

What is the steric number with respect to the central sulfur atom in the Lewis structure for sulfur dioxide, SO₂?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 9

What bonded atom lone pair arrangement is predicted by VSEPR theory for the electron groups that surround the chlorine atom in ClF₃?

A) Linear
B) Trigonal planar
C) V-shaped (bent)
D) Tetrahedral
E) Trigonal bipyramidal

Question 10

What is the bonded atom lone pair arrangement with respect to the electrons around the central oxygen atom in O₃?

A) Linear
B) Trigonal planar
C) Trigonal pyramidal
D) Tetrahedral
E) Bent

Question 11

The bonded atom lone pair arrangement about the carbon atoms in H₂CCH₂ is:

A) trigonal planar.
B) tetrahedral.
C) trigonal bipyramidal.
D) octahedral.
E) none of these

Question 12

What is the bonded atom lone pair arrangement with respect to the electrons around the sulfur atom in SO₂?

A) Linear
B) Trigonal planar
C) Trigonal pyramidal
D) Tetrahedral
E) Bent

Question 13

The bonded atom lone pair arrangement about the nitrogen atoms in HNNH is:

A) trigonal planar.
B) tetrahedral.
C) trigonal bipyramidal.
D) octahedral.
E) none of these

Question 14

What is the steric number with respect to the central carbon atom in the Lewis structure for carbon dioxide, CO₂?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 15

What is the bonded atom lone pair arrangement with respect to the electrons around the central iodine atom in the species, IF₄^{1 -} ?

A) Tetrahedral
B) Trigonal bipyramidal
C) See-Saw
D) Octahedral
E) Square base pyramid

Question 16

What is the steric number with respect to the central chlorine atom in the Lewis structure for chlorine trifluoride, ClF₃?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 17

What bonded atom lone pair arrangement would be assumed by the electron groups around the central phosphorous atom in phosphite, PO₃^{3 -} ?

A) Linear
B) Angular
C) Trigonal planar
D) Trigonal pyramidal
E) Tetrahedral

Question 18

What is the bonded atom lone pair arrangement with respect to the iodine atom in the species ICl₂^{1 -} ?

A) Linear
B) Trigonal planar
C) V-shaped (bent)
D) Tetrahedral
E) Trigonal bipyramidal

Question 19

The bonded atom lone pair arrangement about the nitrogen atom in NF₃ is:

A) trigonal planar.
B) tetrahedral.
C) trigonal bipyramidal.
D) octahedral.
E) none of these

Question 20

The bonded atom lone pair arrangement about the sulfur atom in SF₄ is:

A) trigonal planar.
B) tetrahedral.
C) trigonal bipyramidal.
D) octahedral.
E) none of these

Question 21

Which of the following molecules would have a Lewis structure that most closely resembles SiO₂, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

A) H₂O
B) C S₂
C) SCl₂
D) SO₂
E) XeF₂

Question 22

What molecule listed below has a square planar molecular shape?

A) XeF₄
B) SF₄
C) SiF₄
D) CF₄
E) ClF₅

Question 23

What is the molecular shape of NI₃?

A) Trigonal plane
B) Linear
C) Tetrahedral
D) Trigonal pyramid
E) None of these

Question 24

Which of the following molecules would have a Lewis structure that most closely resembles CCl₄, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

A) SF₄
B) XeF₄
C) SiBr₄
D) IF₄^{1 -}
E) None of these

Question 25

What molecular shape would you predict for the bonding around Ge in GeCl₄?

A) Square planar
B) Trigonal
C) Tetrahedral
D) Trigonal pyramid
E) None of these

Question 26

Which of the following molecules has a central atom that has a trigonal planar bonded atom lone pair arrangement?

A) SO₃
B) IF₃
C) NF₃
D) All of these
E) None of these

Question 27

What molecular shape is assumed by the four atoms in the molecule, ClF₃?

A) Trigonal pyramidal
B) Trigonal planar
C) T-shaped
D) Tetrahedral
E) Trigonal bipyramidal

Question 28

What molecular shape is assumed by the three atoms in the ion, ICl₂^{1 -} ?

A) Linear
B) Trigonal planar
C) Bent
D) Tetrahedral
E) Trigonal bipyramidal

Question 29

Three statements are given below. Pick the best answer.
I. BCl₃ is a trigonal planar molecule.
II. SF₆ is an octahedral molecule.
III. PH₃ is a trigonal planar molecule.

A) I and II are correct, III is not
B) I and III are correct, II is not
C) II and III are correct, I is not
D) all are true
E) only I is true

Question 30

What molecule listed below has a see-saw molecular shape?

A) XeF₄
B) SF₄
C) SiF₄
D) CF₄
E) ClF₅

Question 31

What molecular shape is assumed by the four atoms in the phosphite anion, PO₃^{3 -} ?

A) Linear
B) Angular
C) Trigonal planar
D) Trigonal pyramidal
E) Tetrahedral

Question 32

What molecular shape is assumed by the five atoms in the ion, IF₄^{1 -} ?

A) Tetrahedral
B) Square planar
C) See-Saw
D) Octahedral
E) Square base pyramid

Question 33

What molecular shape is assumed by the three atoms in the molecule, SO₂?

A) Linear
B) Trigonal planar
C) Trigonal pyramidal
D) Tetrahedral
E) Bent

Question 34

What is the bonded atom lone pair arrangement with respect to the electron groups around the central nitrogen atom in the nitrate anion, NO₃^{1 -} ?

A) Angular
B) Linear
C) Trigonal planar
D) Trigonal pyramidal
E) T-shape

Question 35

Which of the following molecules would have a Lewis structure that most closely resembles BBr₃, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

A) NCl₃
B) ClF₃
C) AlCl₃
D) PCl₃
E) None of these

Question 36

What molecular shape is assumed by the four atoms in the molecule, NH₃?

A) Linear
B) Trigonal planar
C) Bent
D) Tetrahedral
E) Trigonal pyramidal

Question 37

What molecular shape is assumed by the four atoms in the nitrate anion, NO₃^{1 -} ?

A) Angular
B) Linear
C) Trigonal planar
D) Trigonal pyramidal
E) T-shape

Question 38

Which of the following molecules has a central atom that has a tetrahedral bonded atom lone pair arrangement?

A) CCl₄
B) NF₃
C) H₂S
D) All of these
E) None of these

Question 39

What molecular shape is assumed by the three atoms in the molecule, CO₂?

A) Linear
B) Trigonal planar
C) Bent
D) Tetrahedral
E) Trigonal pyramidal

Question 40

Which of the following molecules would have a Lewis structure that most closely resembles O₃, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

A) H₂S
B) CO₂
C) OCl₂
D) SO₂
E) KrF₂

Question 41

Given the three statements below, pick the best answer.
I. [AlCl₄] ^- is tetrahedral.
II. The Cl - N - Cl angle in NCl₃ is about 120 ° .
III. The H - S - H angle in H₂S is about 109 ° .

A) I and II are true, III is false
B) I and III are true, II is false
C) II and III are true, I is false
D) all three are true
E) only I is true

Question 42

What is the H - C - H bond angle in CH₄?

A) 90 °
B) 109 °
C) 120 °
D) 180 °
E) a and c

Question 43

Exhibit 10-1 Consider the molecule IF 3 to answer the following question(s). In theory, there are three possible molecular shapes for the molecule IF 3 as shown below. I.
II.
III.
Refer to Exhibit 10-1. After assessing significant interactions (LP - LP, LP - BP and BP - BP), arrange the three shapes in order of least favorable to most favorable molecular shape.

A) (least favorable) I < II < III (most favorable)
B) (least favorable) I < III < II (most favorable)
C) (least favorable) II < I < III (most favorable)
D) (least favorable) II < III < I (most favorable)
E) (least favorable) III < I < II (most favorable)

Question 44

The H - X - H angle is largest in which species below?

A) H₂O
B) NH₃
C) H₂CO
D) BeH₂
E) CH₄

Question 45

In the reaction BH₃ + NH₃→H₃B - NH₃ the H - B - H bond angles change from about:

A) 109 ° to 120 °
B) 90 ° to 109 °
C) 120 ° to 109 °
D) are 109 ° in both reactant and product
E) are 120 ° in both reactant and product

Question 46

Below is a structural formula for methyl formate. Complete its Lewis structure. What are the approximate bond angles (A-C) in the figure below for methyl formate?

A) A = 90°, B = 180°, C = 90°
B) A = 120°, B = 180°, C = 109°
C) A = 120°, B = 109°, C = 90°
D) A = 109°, B = 109°, C = 109°
E) A = 120°, B = 109°, C = 109°

Question 47

Consider the molecule shown below of carbonic acid. Complete its Lewis structure. What are the two approximate bond angles represented by A and B in the figure below?

A) A = 180° and B = 90°
B) A = 109° and B = 90°
C) A = 180° and B = 109°
D) A = 109° and B = 120°
E) A = 180° and B = 120°

Question 48

What value listed below best approximates the H - O - H bond angle in water?

A) 90 °
B) 104.5 °
C) 109 °
D) 120 °
E) 180 °

Question 49

Which molecule listed below has the largest F - X - F angle (X = central atoms)?

A) OF₂
B) NF₃
C) CF₄
D) PF₃
E) XeF₂

Question 50

Below is a structural formula of ethanol. Complete its Lewis structure. What are the approximate values for the two bond angles indicated by A and B in the figure?

A) A = 90° and B = 180°
B) A = 109° and B = 180°
C) A = 90° and B = 120°
D) A = 109° and B = 120°
E) A = 109° and B = 109°

Question 51

What is the approximate Cl - C - Cl angle in Cl₂CO (note the 2 Cl atoms and the O atom are bound to the C and not to each other)?

A) 90 °
B) 109 °
C) 120 °
D) 180 °
E) none of these

Question 52

Exhibit 10-1 Consider the molecule IF 3 to answer the following question(s). In theory, there are three possible molecular shapes for the molecule IF 3 as shown below.
I.
II.
III.
Refer to Exhibit 10-1. How many significant (90 or less) lone pair/lone pair (LP - LP) interactions are present in each shape?

A) Shape I = 0; Shape II = 0; Shape III = 0
B) Shape I = 0; Shape II = 0; Shape III = 1
C) Shape I = 0; Shape II = 1; Shape III = 0
D) Shape I = 1; Shape II = 0; Shape III = 0
E) Shape I = 1; Shape II = 1; Shape III = 1

Question 53

Below is a structural formula of acetic acid. Complete its Lewis structure. What are the approximate bond angles as predicted by VSEPR theory for angles A-C?

A) A = 90°, B = 90°, C = 180°
B) A = 109°, B = 90°, C = 180°
C) A = 90°, B = 109°, C = 180°
D) A = 109°, B = 120°, C = 109°
E) A = 109°, B = 90°, C = 109°

Question 54

What is the O - S - O bond angle in SO₃?

A) 90 °
B) 109 °
C) 120 °
D) 180 °
E) 90 ° and 120 °

Question 55

What is the approximate H - N - H bond angle in a molecule of NH₃?

A) 90 °
B) 107 °
C) 120 °
D) 180 °
E) None of these

Question 56

Pick the one statement listed below that is true .

A) The H - S - H angle in H₂S is about 180 ° .
B) The Cl - P - Cl angles in PCl₃ are all about 120 ° .
C) The F - Al - F angles in AlF₃ are all about 120 ° .
D) The O - S - O angle in SO₂ is 180 ° .
E) All 4 answers are false.

Question 57

Given the three statements below, pick the best answer.
I. The H - N - H angle in NH₃ should be about 109 ° .
II. SF₄ is tetrahedral.
III. SO₂ is linear.

A) I and II are true, III is not
B) I and III are true, II is not
C) II and III are true, I is not
D) all three are true
E) only I is true

Question 58

The H - C - H angle in CH₂Cl₂ is approximately:

A) 109 °
B) 120 °
C) 180 °
D) 90 °
E) none of these

Question 59

Based upon VSEPR theory, what are the two approximate bond angles labeled A and B respectively in the following molecule of ethanal?

A) A = 90°, B = 180°
B) A = 109°, B = 180°
C) A = 109°, B = 120°
D) A = 90°, B = 120°
E) A = 109°, B = 109°

Question 60

The H - C - H angle in H₃CCl is approximately:

A) 90 °
B) 180 °
C) 120 °
D) 109 °
E) none of these

Question 61

Which of the following molecules is(are) non-polar ?
I. O₃ (angular)
II. H₂O (angular)
III. CO₂ (linear)

A) I only
B) I and II
C) I and III
D) II and III
E) All of these

Question 62

Which molecule from the list below is considered polar ?
The molecular shape is listed in parenthesis.

A) NCl₃ (trigonal pyramidal)
B) CO₂ (linear)
C) CH₄ (tetrahedral)
D) N₂ (linear)
E) SO₃ (trigonal planar)

Question 63

From the list of compounds provided below, which compound is polar ?

A) CCl₄
B) C S₂
C) SO₃
D) SF₄
E) PF₅

Question 64

Given the three statements below, pick the best answer.
I. HBF₂ is a non-polar molecule.
II. CF₄ is a non-polar molecule.
III. NF₃ is a non-polar molecule.

A) only I is correct
B) only II is correct
C) only III is correct
D) II and III are correct, I is not
E) all three are incorrect

Question 65

Which statement below best describes CO₂ with respect to the polarity of bonds and the polarity of the molecule?

A) CO₂ has polar C - O bonds and is a polar molecule .
B) CO₂ has polar C - O bonds and is a non-polar molecule .
C) CO₂ has non-polar C - O bonds and is a polar molecule .
D) CO₂ has non-polar C - O bonds and is a non-polar molecule .
E) CO₂ is neither a polar nor a non-polar molecule but is rather an Ionic compound.

Question 66

Which of the following molecules is(are) polar?
I. SO₂ (angular)
II. OF₂ (angular)
III. C S₂ (linear)

A) I only
B) II only
C) III only
D) I and II
E) II and III

Question 67

Which of the molecules listed below is polar?

A) SiCl₄
B) PCl₅
C) AsCl₃
D) AlCl₃
E) all are non-polar

Question 68

Which of the following molecule is considered nonpolar ?
The molecular geometry is listed in parenthesis.

A) PCl₃ (trigonal pyramidal)
B) CHCl₃ (tetrahedral)
C) CO₂ (linear)
D) SO₂ (angular)
E) HCN (linear)

Question 69

Which statement below best describes SO₂ with respect to the polarity of bonds and the polarity of the molecule?

A) SO₂ has polar S - O bonds and is a polar molecule .
B) SO₂ has polar S - O bonds and is a non-polar molecule .
C) SO₂ has non-polar S - O bonds and is a polar molecule .
D) SO₂ has non-polar S - O bonds and is a non-polar molecule .
E) SO₂ is neither a polar nor a non-polar molecule but is rather an Ionic compound.

Question 70

Which of the following molecules is(are) polar ?
I. N₂
II. HCl
III. Cl₂

A) I only
B) II only
C) III only
D) I and II
E) All of these

Question 71

Pick the one statement below that is true.

A) CO₂ is polar.
B) H₂S is non-polar.
C) HCCl₃ is non-polar.
D) PF₅ is polar.
E) All of these statements are false.

Question 72

Which of the following molecules is(are) polar ?
I. NH₃ (trigonal pyramidal)
II. SO₃ (trigonal planar)
III. ClF₃ (T-shaped)

A) II only
B) I and II
C) I and III
D) II and III
E) All of these

Question 73

Which of the following molecules is(are) polar ?
I. BF₃ (trigonal planar)
II. NH₃ (trigonal pyramidal)
III. BF₂Cl (trigonal planar)

A) I only
B) I and II
C) I and III
D) II and III
E) All of these

Question 74

Which of the following molecules is(are) nonpolar ?
I. SiCl₄ (tetrahedral)
II. CHCl₃ (tetrahedral)
III. CH₂Cl₂ (tetrahedral)

A) I only
B) II only
C) III only
D) I and II
E) All of these

Question 75

Given the three molecules listed below, which choice is correct?
I. H₂S
II. BF₃
III. PF₃

A) all are polar
B) I and II are polar, III is non-polar
C) I and III are polar, II is non-polar
D) III is polar, I and II are non-polar
E) none of these choices are correct

Question 76

Which statement below best describes NH₃ with respect to the polarity of bonds and the polarity of the molecule?

A) NH₃ has polar N - H bonds and is a polar molecule .
B) NH₃ has polar N - H bonds and is a non-polar molecule .
C) NH₃ has non-polar N - H bonds and is a polar molecule .
D) NH₃ has non-polar N - H bonds and is a non-polar molecule .
E) NH₃ is neither a polar nor a non-polar molecule but is rather an Ionic compound.

Question 77

Which of the following molecules is non-polar?

A) BCl₃
B) H₂O
C) NCl₃
D) PCl₃
E) all are polar

Question 78

Which of the following is a non-polar molecule that contains polar bonds?

A) H₂O
B) SO₂
C) CCl₄
D) Cl₂
E) none of these

Question 79

Which of the molecules listed below is polar?

A) BH₃
B) PH₃
C) CF₄
D) PF₅
E) all are non-polar

Question 80

Which of the following molecules is(are) polar ?
I. NF₃ (trigonal pyramidal)
II. BF₃ (trigonal planar)
III. IF₃ (T-shape)

A) I only
B) II only
C) III only
D) I and II
E) I and III