Deck 6: Chemical Bonding I

Question 1

Identify the number of bonding pairs and lone pairs of electrons in water.

A) 1 bonding pair and 1 lone pair
B) 1 bonding pair and 2 lone pairs
C) 2 bonding pairs and 2 lone pairs
D) 2 bonding pairs and 1 lone pair
E) 3 bonding pairs and 2 lone pairs

Answer 1

2 bonding pairs and 2 lone pairs

Question 2

Using periodic trends,place the following bonds in order of increasing ionic character. Si-P Si-Cl Si-S

A) Si-P < Si-Cl < Si-S
B) Si-P < Si-S < Si-Cl
C) Si-S < Si-Cl < Si-P
D) Si-Cl < Si-P < Si-S
E) Si-Cl < Si-S < Si-P

Answer 2

Si-P < Si-S < Si-Cl

Question 3

Give the number of valence electrons for XeI₂.

A) 22
B) 20
C) 18
D) 24
E) 16

Answer 3

22

Question 4

Choose the best Lewis structure for SF₄.

A)
B)
C)
D)
E)

Question 5

Choose the bond below that is LEAST polar.

A) P-F
B) C-Br
C) C-F
D) C-I
E) C-Cl

Question 6

Identify the compound with the smallest dipole moment in the gas phase.

A) Cl₂
B) ClF
C) HF
D) LiF

Question 7

Give the number of valence electrons for CH₂Cl₂.

A) 16
B) 18
C) 20
D) 22
E) 12

Question 8

Choose the best Lewis structure for CH₂Cl₂.

A)
B)
C)
D)
E)

Question 9

Identify the compound with the highest percent ionic character.

A) HF
B) IBr
C) HCl
D) LiF

Question 10

Identify the shortest bond.

A) single covalent bond
B) double covalent bond
C) triple covalent bond
D) All of the above bonds are the same length.

Question 11

Identify the compound with the largest dipole moment in the gas phase.

A) Cl₂
B) ClF
C) HF
D) LiF

Question 12

Choose the best Lewis structure for ICl₅.

A)
B)
C)
D)
E)

Question 13

Identify the compound with the smallest percent ionic character.

A) HF
B) IBr
C) HCl
D) LiF

Question 14

Choose the best Lewis structure for BeF₂.

A)
B)
C)
D)
E)

Question 15

Choose the best Lewis structure for XeI₂.

A)
B)
C)
D)
E)

Question 16

Give the number of valence electrons for ICl₅.

A) 36
B) 40
C) 42
D) 44
E) 46

Question 17

Identify the weakest bond.

A) single covalent bond
B) double covalent bond
C) triple covalent bond
D) All of the above bonds are the same strength.

Question 18

Identify the strongest bond.

A) single covalent bond
B) double covalent bond
C) triple covalent bond
D) All of the above bonds are the same strength.

Question 19

Choose the best Lewis structure for OCl₂.

A)
B)
C)
D)
E)

Question 20

Choose the bond below that is MOST polar.

A) H-I
B) H-Br
C) H-F
D) H-Cl
E) C-H

Question 21

Choose the best Lewis structure for PO₄³⁻.

A)
B)
C)
D)
E)

Question 22

Draw the best Lewis structure for CH₃⁺¹.What is the formal charge on the C?

A) 0
B) 1
C) -1
D) 2

Question 23

Draw the Lewis structure for NO₂⁻ including any valid resonance structures.Which of the following statements is TRUE?

A) The nitrite ion contains one N-O single bond and one N O double bond.
B) The nitrite ion contains two N-O bonds that are equivalent to 1 bonds.
C) The nitrite ion contains two N O double bonds.
D) The nitrite ion contains two N-O single bonds.
E) None of the above are true.

Question 24

Give the number of valence electrons for SO₄^2-.

A) 32
B) 30
C) 34
D) 28
E) 36

Question 25

Choose the best Lewis structure for SeO₄²⁻.

A)
B)
C)
D)
E)

Question 26

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

A) O(2 lone pairs) C N (2 lone pairs)
B) O(1 lone pair) C-N(3 lone pairs)
C) O(1 lone pair) C(2 lone pairs) N(1 lone pair)
D) O(3 lone pairs)-C N(with 1 lone pair)
E) They all contribute equally to the correct structure of OCN⁻.

Question 27

Draw the Lewis structure for CO₃^2- including any valid resonance structures.Which of the following statements is TRUE?

A) The CO₃^2- ion contains one C-O single bond and two C O double bonds.
B) The CO₃^2- ion contains two C-O single bonds and one C O double bond.
C) The CO₃^2- ion contains three C-O double bonds.
D) The CO₃^2- ion contains two C-O single bonds and one C O triple bond.
E) None of the above are true.

Question 28

Using Lewis structures and formal charge,which of the following ions is most stable?
OCN⁻ ONC⁻ NOC⁻

A) OCN⁻
B) ONC⁻
C) NOC⁻
D) None of these ions are stable according to Lewis theory.
E) All of these compounds are equally stable according to Lewis theory.

Question 29

Identify the compound with atoms that have an incomplete octet.

A) ICl₅
B) CO₂
C) BF₃
D) Cl₂
E) CO

Question 30

Choose the best Lewis structure for NH₄⁺.

A)
B)
C)
D)
E)

Question 31

Which compound has the longest carbon-carbon bond length?

A) CH₃CH₃
B) CH₂CH₂
C) HCCH
D) All bond lengths are the same.

Question 32

Choose the best Lewis structure for NO₃⁻.

A)
B)
C)
D)
E)

Question 33

Draw the best Lewis structure for the free radical,NO₂.What is the formal charge on the N?

A) 0
B) +1
C) -1
D) +2
E) -2

Question 34

Which compound has the shortest carbon-carbon bond length?

A) CH₃CH₃
B) CH₂CH₂
C) HCCH
D) All bond lengths are the same.

Question 35

Draw the best Lewis structure for BrO₄⁻ and determine the formal charge on bromine.

A) -1
B) +1
C) 0
D) +2
E) +3

Question 36

Draw the best Lewis structure for Cl₃⁻.What is the formal charge on the central Cl atom?

A) -1
B) 0
C) +1
D) +2
E) -2

Question 37

Draw the best Lewis structure for CH₃^-1.What is the formal charge on the C?

A) 0
B) 1
C) -1
D) 2

Question 38

Draw the Lewis structure for SO₄²⁻.How many equivalent resonance structures can be drawn?

A) 6
B) 2
C) 4
D) 3
E) 8

Question 39

Choose the best Lewis structure for BF₃.

A)
B)
C)
D)
E)

Question 40

Choose the best Lewis structure for SO₄²⁻.

A)
B)
C)
D)
E)

Question 41

Determine the electron geometry (eg)and molecular geometry (mg)of XeF₂.

A) eg = trigonal bipyramidal, mg = bent
B) eg = linear, mg = linear
C) eg = tetrahedral, mg = linear
D) eg = trigonal bipyramidal, mg = linear
E) eg = tetrahedral, mg = bent

Question 42

Determine the electron geometry (eg)and molecular geometry (mg)of CO₃²⁻.

A) eg = tetrahedral, mg = tetrahedral
B) eg = tetrahedral, mg = trigonal pyramidal
C) eg = trigonal planar, mg = bent
D) eg = trigonal planar, mg = trigonal planar
E) eg = tetrahedral, mg = trigonal planar

Question 43

Place the following in order of increasing bond length. C-F C-S C-Cl

A) C-S < C-Cl < C-F
B) C-Cl < C-F < C-S
C) C-F < C-S < C-Cl
D) C-F < C-Cl < C-S
E) C-S < C-F < C-Cl

Question 44

Which compound has the highest carbon-carbon bond strength?

A) CH₃CH₃
B) CH₂CH₂
C) HCCH
D) All bond strengths are the same.

Question 45

Determine the electron geometry (eg)and molecular geometry (mg)of ICl₂⁻.

A) eg = tetrahedral, mg = bent
B) eg = tetrahedral, mg = trigonal pyramidal
C) eg = trigonal bipyramidal, mg = linear
D) eg = trigonal bipyramidal, mg = trigonal planar
E) eg = octahedral, mg = linear

Question 46

The bond angle in NH₃ is

A) 107°
B) 104.5°
C) 120°
D) 109.5°
E) 95°

Question 47

Place the following in order of decreasing XO bond length,where "X" represents the central atom in each of the following compounds or ions. SiO₃²⁻ CO₂ CO₃²⁻

A) CO₂ > SiO₃²⁻ > CO₃²⁻
B) CO₂ > CO₃²⁻ > SiO₃²⁻
C) CO₃²⁻ > CO₂ > SiO₃²⁻
D) CO₃²⁻ > SiO₃²⁻ > CO₂
E) SiO₃²⁻ > CO₃²⁻ > CO₂

Question 48

Determine the electron geometry (eg)and molecular geometry (mg)of PF₅.

A) eg = trigonal bipyramidal, mg = trigonal bipyramidal
B) eg = octahedral, mg = octahedral
C) eg = trigonal bipyramidal, mg = tetrahedral
D) eg = tetrahedral, mg = trigonal pyramidal
E) eg = trigonal planar, mg = octahedral

Question 49

Determine the electron geometry (eg)and molecular geometry (mg)of CO₂.

A) eg = tetrahedral, mg = tetrahedral
B) eg = linear, mg = trigonal planar
C) eg = trigonal planar, mg = bent
D) eg = linear, mg = linear
E) eg = trigonal planar, mg = trigonal planar

Question 50

Determine the electron geometry (eg)and molecular geometry (mg)of NCl₃.

A) eg = tetrahedral, mg = tetrahedral
B) eg = linear, mg = trigonal planar
C) eg = trigonal planar, mg = bent
D) eg = linear, mg = linear
E) eg = tetrahedral, mg = trigonal pyramidal

Question 51

Determine the electron geometry (eg)and molecular geometry (mg)of CH₃⁺¹.

A) eg = tetrahedral, mg = tetrahedral
B) eg = tetrahedral, mg = trigonal pyramidal
C) eg = trigonal planar, mg = bent
D) eg = trigonal planar, mg = trigonal planar
E) eg = tetrahedral, mg = trigonal planar

Question 52

Determine the electron geometry (eg)and molecular geometry (mg)of Br F₃.

A) eg = trigonal planar, mg = trigonal planar
B) eg = trigonal bipyramidal, mg = T-shape
C) eg = trigonal planar, mg = bent
D) eg = trigonal bipyramidal, mg = see-saw
E) eg = tetrahedral, mg = trigonal pyramidal

Question 53

Identify the bond with the highest bond energy.

A) Si = O
B) N = N
C) C = C
D) C = N
E) O = O

Question 54

Place the following in order of increasing bond length. NO₂⁻ NO₃⁻ NO

A) NO < NO₂⁻ < NO₃⁻
B) NO₂⁻ < NO₃⁻ < NO
C) NO₃⁻ < NO < NO₂⁻
D) NO < NO₃⁻ < NO₂⁻
E) NO₃⁻ < NO₂⁻ < NO

Question 55

Determine the electron geometry (eg)and molecular geometry (mg)of SiF₄.

A) eg = tetrahedral, mg = trigonal pyramidal
B) eg = octahedral, mg = square planar
C) eg = trigonal bipyramidal, mg = trigonal pyramidal
D) eg = tetrahedral, mg = bent
E) eg = tetrahedral, mg = tetrahedral

Question 56

Determine the electron geometry (eg)and molecular geometry(mg)of BCl₃.

A) eg = trigonal planar, mg = trigonal planar
B) eg = tetrahedral, mg = trigonal planar
C) eg = tetrahedral, mg = trigonal pyramidal
D) eg = trigonal planar, mg = bent
E) eg = trigonal bipyramidal, mg = trigonal bipyramidal

Question 57

Give the approximate bond angle for a molecule with an octahedral shape.

A) 109.5°
B) 180°
C) 120°
D) 105°
E) 90°

Question 58

The bond angle in H₂O is

A) 107°
B) 104.5°
C) 120°
D) 109.5°
E) 95°

Question 59

Rank the following molecules in decreasing bond energy. Cl₂ Br₂ F₂ I₂

A) I₂ > Br₂ > Cl₂ > F₂
B) Cl₂ > Br₂ > F₂ > I₂
C) I₂ > Cl₂ > Br₂ > F₂
D) Cl₂ > I₂ > F₂ > Br₂

Question 60

Place the following in order of decreasing bond length. H-F H-I H-Br

A) H-F > H-Br > H-I
B) H-I > H-F > H-Br
C) H-I > H-Br > H-F
D) H-Br > H-F > H-I
E) H-F > H-I > H-Br

Question 61

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom CH₃OCH₃.

A) eg = tetrahedral, mg = tetrahedral
B) eg = linear, eg = linear
C) eg = tetrahedral, mg = bent
D) eg = trigonal bipyramidal, mg = tetrahedral
E) eg = octahedral, mg = square planar

Question 62

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SO₂.

A) eg = tetrahedral, mg = bent, polar
B) eg = trigonal planar, mg = bent, polar
C) eg = linear, mg = linear, nonpolar
D) eg = tetrahedral, mg = tetrahedral, nonpolar
E) eg = trigonal pyramidal, mg = trigonal pyramidal, polar

Question 63

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H₂O H₃O⁺

A) HCN < H₂O < H₃O⁺
B) H₃O⁺ < H₂O < HCN
C) HCN < H₃O⁺ < H₂O
D) H₂O < HCN < H₃O⁺
E) H₂O < H₃O⁺ < HCN

Question 64

Determine the electron geometry (eg)and molecular geometry (mg)of XeF₄.

A) eg = tetrahedral, mg = tetrahedral
B) eg = linear, eg = linear
C) eg = tetrahedral, mg = bent
D) eg = trigonal bipyramidal, mg = tetrahedral
E) eg = octahedral, mg = square planar

Question 65

Place the following in order of increasing dipole moment. I.BCl₃ II.BIF₂ III.BClF₂

A) I < II = III
B) II < III < I
C) I < II < III
D) II < I < III
E) I < III < II

Question 66

Determine the electron geometry,molecular geometry and polarity of SF₆.

A) eg = trigonal bipyramidal, mg = trigonal bipyramidal, nonpolar
B) eg = tetrahedral, mg = tetrahedral, polar
C) eg = trigonal bipyramidal, mg = see-saw, polar
D) eg = octahedral, mg = trigonal bipyramidal, nonpolar
E) eg = octahedral, mg = octahedral, nonpolar

Question 67

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SO₃.

A) eg = tetrahedral, mg = trigonal pyramidal, polar
B) eg = tetrahedral, mg = tetrahedral, nonpolar
C) eg = trigonal planar, mg = trigonal planar, nonpolar
D) eg = trigonal bipyramidal, mg = trigonal planar, polar
E) eg = trigonal pyramidal, mg = bent, nonpolar

Question 68

Determine the electron geometry,molecular geometry and polarity of HBrO₂.

A) eg = trigonal bipyramidal, mg = trigonal planar, nonpolar
B) eg = octahedral, mg = square planar, nonpolar
C) eg = tetrahedral, mg = bent, polar
D) eg = tetrahedral, mg = linear, nonpolar
E) eg = linear, mg = linear, polar

Question 69

Determine the electron geometry (eg),molecular geometry (mg),and polarity of PCl₃.

A) eg = tetrahedral, mg = bent, polar
B) eg = trigonal planar, mg = trigonal planar, nonpolar
C) eg = linear, mg = linear, nonpolar
D) eg = tetrahedral, mg = trigonal pyramidal, polar
E) eg = trigonal pyramidal, mg = trigonal pyramidal, polar

Question 70

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom H₂CO.

A) eg = tetrahedral, mg = tetrahedral
B) eg = trigonal planar, eg = trigonal planar
C) eg = tetrahedral, mg = bent
D) eg = trigonal bipyramidal, mg = tetrahedral
E) eg = octahedral, mg = square planar

Question 71

How many of the following molecules are polar?
PCl₅ COS XeO₃ SeBr₂

A) 2
B) 0
C) 1
D) 3
E) 4

Question 72

Consider the molecule below.Determine the molecular geometry at each of the 3 labeled atoms.

A) 1 = trigonal planar, 2 = tetrahedral, 3 = trigonal pyramidal
B) 1 = tetrahedral, 2 = tetrahedral, 3 = tetrahedral
C) 1 = trigonal planar, 2 = tetrahedral, 3 = tetrahedral
D) 1 = tetrahedral, 2 = tetrahedral, 3 = trigonal planar
E) 1 = trigonal planar, 2 = trigonal pyramidal, 3 = trigonal pyramidal

Question 73

Consider the molecule below.Determine the molecular geometry at each of the 2 labeled carbons.

A) C1 = tetrahedral, C2 = linear
B) C1 = trigonal planar, C2 = bent
C) C1 = bent, C2 = trigonal planar
D) C1 = trigonal planar, C2 = tetrahedral
E) C1 = trigonal pyramidal, C2 = see-saw

Question 74

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. CS₂ CF₄ SCl₂

A) CS₂ > SCl₂ > CF₄
B) SCl₂ > CF₄ > CS₂
C) CF₄ > SCl₂ > CS₂
D) CS₂ > CF₄ > SCl₂
E) CF₄ > CS₂ > SCl₂

Question 75

Place the following in order of decreasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. N₂O NCl₃ NO₂⁻

A) NCl₃ > NO₂⁻ > N₂O
B) NO₂⁻ > N₂O > NCl₃
C) N₂O > NO₂⁻ > NCl₃
D) NCl₃ > N₂O > NO₂⁻
E) N₂O > NCl₃ > NO₂⁻

Question 76

Place the following in order of increasing F-A-F bond angle,where A represents the central atom in each molecule. PF₃ OF₂ PF₄⁺

A) PF₃ < OF₂ < PF₄⁺
B) OF₂ < PF₃ < PF₄⁺
C) OF₂ < PF₄⁺ < PF₃
D) PF₄⁺ < OF₂ < PF₃
E) PF₄⁺ < PF₃ < OF₂

Question 77

Determine the electron geometry (eg)and molecular geometry (mg)of the underlined atom CH₃OCH₃.

A) eg = tetrahedral, mg = tetrahedral
B) eg = linear, eg = linear
C) eg = tetrahedral, mg = bent
D) eg = trigonal bipyramidal, mg = tetrahedral
E) eg = octahedral, mg = square planar

Question 78

Determine the electron geometry (eg),molecular geometry(mg)and polarity of XeO₃.

A) eg = trigonal planar, mg = trigonal planar, nonpolar
B) eg = tetrahedral, mg = trigonal pyramidal, polar
C) eg = trigonal planar, mg = trigonal pyramidal, polar
D) eg = trigonal bipyramidal, mg = trigonal planar, nonpolar
E) eg = octahedral, mg = tetrahedral, nonpolar

Question 79

Place the following in order of increasing X-Se-X bond angle,where X represents the outer atoms in each molecule. SeO₂ SeCl₆ SeF₂

A) SeCl₆ < SeF₂ < SeO₂
B) SeF₂ < SeO₂ < SeCl₆
C) SeF₂ < SeCl₆ < SeO₂
D) SeO₂ < SeF₂ < SeCl₆
E) SeCl₆ < SeO₂ < SeF₂

Question 80

How many of the following molecules are polar?
BrCl₃ CS₂ SiF₄ SO₃

A) 1
B) 2
C) 3
D) 4
E) 0