Deck 10: Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Question 1

Give the number of lone pairs around the central atom and the molecular geometry of XeF₂.

A)0 lone pairs, linear
B)1 lone pair, bent
C)2 lone pairs, bent
D)3 lone pairs, bent
E)3 lone pairs, linear

Answer 1

3 lone pairs, linear

Question 2

Give the number of lone pairs around the central atom and the geometry of the ion SeO₄^2-.

A)0 lone pairs, square planar
B)0 lone pairs, tetrahedral
C)1 lone pair, distorted tetrahedron (seesaw)
D)1 lone pair, square pyramidal
E)2 lone pairs, square planar

Answer 2

0 lone pairs, tetrahedral

Question 3

Give the number of lone pairs around the central atom and the geometry of the ion NO₂^-.

A)0 lone pairs, linear
B)1 lone pair, bent
C)2 lone pair, bent
D)3 lone pairs, bent
E)3 lone pairs, linear

Answer 3

1 lone pair, bent

Question 4

The geometry of the ClF₃ molecule is best described as

A)distorted tetrahedron.
B)trigonal planar.
C)tetrahedral.
D)T-shaped.
E)trigonal pyramidal.

Question 5

Give the number of lone pairs around the central atom and the molecular geometry of SCl₂.

A)0 lone pairs, linear
B)1 lone pair, bent
C)2 lone pairs, bent
D)3 lone pairs, bent
E)3 lone pairs, linear

Question 6

Give the number of lone pairs around the central atom and the geometry of the ion ClO₃^-.

A)0 lone pairs, trigonal
B)1 lone pair, bent
C)1 lone pair, trigonal pyramidal
D)2 lone pairs, T-shaped
E)2 lone pairs, trigonal

Question 7

Give the number of lone pairs around the central atom and the geometry of the ion IBr₂^-.

A)0 lone pairs, linear
B)1 lone pair, bent
C)2 lone pairs, bent
D)3 lone pairs, bent
E)3 lone pairs, linear

Question 8

According to VSEPR theory, the geometry of the PH₃ molecule is best described as

A)linear.
B)trigonal planar.
C)tetrahedral.
D)bent.
E)trigonal pyramidal.

Question 9

Give the number of lone pairs around the central atom and the molecular geometry of XeF₄.

A)0 lone pairs, tetrahedral
B)1 lone pair, distorted tetrahedron (seesaw)
C)1 lone pair, square pyramidal
D)1 lone pair, tetrahedral
E)2 lone pairs, square planar

Question 10

Give the number of lone pairs around the central atom and the molecular geometry of IF₅.

A)0 lone pairs, square pyramidal
B)0 lone pairs, trigonal bipyramidal
C)1 lone pair, octahedral
D)1 lone pair, square pyramidal
E)2 lone pairs, pentagonal

Question 11

According to the VSEPR theory, the geometry of the SO₃ molecule is

A)pyramidal.
B)tetrahedral.
C)trigonal planar.
D)distorted tetrahedron (seesaw).
E)square planar.

Question 12

Give the number of lone pairs around the central atom and the geometry of the ion ClO₂^-.

A)0 lone pairs, linear
B)1 lone pair, bent
C)2 lone pairs, bent
D)3 lone pairs, bent
E)3 lone pairs, linear

Question 13

According to the VSEPR theory, the molecular geometry of the carbonate ion, CO₃^{2 -}, is

A)square planar.
B)tetrahedral.
C)pyramidal.
D)trigonal planar.
E)octahedral.

Question 14

Give the number of lone pairs around the central atom and the molecular geometry of SeF₄.

A)0 lone pairs, tetrahedral
B)1 lone pair, distorted tetrahedron (seesaw)
C)1 lone pair, square pyramidal
D)1 lone pair, tetrahedral
E)2 lone pairs, square planar

Question 15

Give the number of lone pairs around the central atom and the geometry of the ion PCl₄^-.

A)0 lone pairs, tetrahedral
B)1 lone pair, distorted tetrahedron (seesaw)
C)1 lone pair, square pyramidal
D)1 lone pair, tetrahedral
E)2 lone pairs, square planar

Question 16

The geometry of the CS₂ molecule is best described as

A)linear.
B)trigonal planar.
C)tetrahedral.
D)bent.
E)trigonal pyramidal.

Question 17

The geometry of the SF₄ molecule is

A)tetrahedral.
B)trigonal pyramidal.
C)trigonal planar.
D)square planar.
E)distorted tetrahedron (seesaw).

Question 18

According to the VSEPR theory, the molecular geometry of beryllium chloride is

A)linear.
B)trigonal planar.
C)bent.
D)tetrahedral.
E)trigonal pyramidal.

Question 19

Give the number of lone pairs around the central atom and the molecular geometry of CBr₄.

A)0 lone pairs, square planar
B)0 lone pairs, tetahedral
C)1 lone pair, square pyramidal
D)1 lone pair, trigonal bipyramidal
E)2 lone pairs, square planar

Question 20

Use VSEPR theory to predict the geometry of the PCl₃ molecule.

A)linear
B)bent
C)trigonal planar
D)trigonal pyramidal
E)tetrahedral

Question 21

Which one of the following molecules has tetrahedral geometry?

A)XeF₄
B)BF₃
C)AsF₅
D)CF₄
E)NH₃

Question 22

According to VSEPR theory, which one of the following molecules should be nonlinear?

A)CO₂
B)C₂H₂
C)SO₂
D)BeCl₂
E)KrF₂

Question 23

According to VSEPR theory, which one of the following molecules has tetrahedral geometry?

A)NH₃
B)CCl₄
C)CO₂
D)SF₄
E)PCl₅

Question 24

According to the VSEPR theory, the molecular geometry of boron trichloride is

A)linear.
B)trigonal planar.
C)bent.
D)tetrahedral.
E)trigonal pyramidal.

Question 25

The bond angle in Cl₂O is expected to be approximately

A)90°.
B)109.5°.
C)120°.
D)145°.
E)180°.

Question 26

The bond angles in SF₅⁺ are expected to be

A)90°.
B)120°.
C)90° and 120°.
D)90° and 180°.
E)90°, 120°, and 180°.

Question 27

Which of the following substance is/are planar? (i)SO₃ (ii)SO₃^2- (iii)NO₃^- (iv)PF₃ (v)BF₃

A)only (i)and (ii)
B)only (i), (iii), and (v)
C)only (iv)
D)all are planar except (iv)
E)all are planar except (ii)

Question 28

Predict the geometry around the central atom in PO₄^3-.

A)trigonal planar
B)trigonal pyramidal
C)tetrahedral
D)trigonal bipyramidal
E)octahedral

Question 29

The bond angle in SCl₂ is expected to be

A)a little less than 109.5°.
B)109.5°.
C)a little more than 109.5°.
D)120°.
E)180°.

Question 30

The F - S - F bond angles in SF₆ are

A)90° and 180°.
B)109.5°.
C)120°.
D)180°.
E)90° and 120°.

Question 31

The bond angles in CO₃^2- are expected to be

A)a little less than 109.5°.
B)109.5°.
C)a little less than 120°.
D)120°.
E)a little more than 120°.

Question 32

According to the VSEPR theory, the molecular geometry of ammonia is

A)linear.
B)trigonal planar.
C)bent.
D)tetrahedral.
E)trigonal pyramidal.

Question 33

According to VSEPR theory, which one of the following species has a tetrahedral geometry?

A)IF₄⁺
B)IF₄^-
C)PCl₄⁺
D)PCl₄^-
E)SeF₄

Question 34

Predict the geometry around the central atom in XeO₄.

A)trigonal planar
B)trigonal pyramidal
C)tetrahedral
D)trigonal bipyramidal
E)octahedral

Question 35

According to the VSEPR theory, which one of the following species should be linear?

A)H₂S
B)HCN
C)BF₃
D)H₂CO
E)SO₂

Question 36

Which of the following substances is/are bent?
(i)H₂S
(ii)CO₂
(iii)ClNO
(iv)NH₂^-
(v)O₃

A)only (iii)
B)only (i)and (v)
C)only (i), (iii), and (v)
D)all are bent except for (iv)
E)all are bent except for (ii)

Question 37

According to the VSEPR theory, the molecular geometry of SiCl₄ is

A)linear.
B)trigonal planar.
C)bent.
D)tetrahedral.
E)trigonal pyramidal.

Question 38

The bond angle in ICl₂^- is expected to be

A)a little less than 109.5°.
B)109.5°.
C)a little more than 109.5°.
D)120°.
E)180°.

Question 39

According to VSEPR theory, which one of the following molecules should have a geometry that is trigonal bipyramidal?

A)SF₄
B)XeF₄
C)NF₃
D)SF₆
E)PF₅

Question 40

Predict the geometry around the central atom in SO₄^2-.

A)trigonal planar
B)trigonal pyramidal
C)tetrahedral
D)trigonal bipyramidal
E)octahedral

Question 41

Predict the molecular geometry and polarity of the SO₂ molecule.

A)linear, polar
B)linear, nonpolar
C)bent, polar
D)bent, nonpolar
E)None of the above.

Question 42

Which of the following species has the largest dipole moment (i.e., is the most polar)?

A)CH₄
B)CH₃Br
C)CH₃Cl
D)CH₃F
E)CH₃I

Question 43

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 44

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 45

The F -Cl -F bond angles in ClF₃ are expected to be approximately

A)90° only.
B)109.5° only.
C)120° only.
D)180° only.
E)90° and 180°.

Question 46

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of the nitrogen atom in the structure of DEET shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 47

Predict the geometry and polarity of the CS₂ molecule.

A)linear, polar
B)linear, nonpolar
C)tetrahedral, nonpolar
D)bent, nonpolar
E)bent, polar

Question 48

Which one of the following molecules has a non-zero dipole moment?

A)BeCl₂
B)Br₂
C)BF₃
D)IBr
E)CO₂

Question 49

Which one of the following molecules has a zero dipole moment?

A)CO
B)CH₂Cl₂
C)SO₃
D)SO₂
E)NH₃

Question 50

The C-N-O bond angle in nitromethane, CH₃NO₂, is expected to be approximately

A)60°.
B)90°.
C)109.5°.
D)120°.
E)180°.

Question 51

Indicate the type of hybrid orbitals used by the central atom in PCl₃.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 52

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 53

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. What is the hybridization state of oxygen indicated by the arrow in the structure of ibuprofen shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 54

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 55

Which one of the following molecules is nonpolar?

A)NH₃
B)OF₂
C)CH₃Cl
D)H₂O
E)BeCl₂

Question 56

According to the VSEPR theory, the actual F -As -F bond angles in the AsF₄^- ion are predicted to be

A)109.5°.
B)90° and 120°.
C)180°.
D)< 109.5°.
E)< 90° and < 120°.

Question 57

Complete this sentence: The PCl₅ molecule has

A)nonpolar bonds, and is a nonpolar molecule.
B)nonpolar bonds, but is a polar molecule.
C)polar bonds, and is a polar molecule.
D)polar bonds, but is a nonpolar molecule.

Question 58

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever. What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 59

Which one of the following molecules is polar?

A)PBr₅
B)CCl₄
C)BrF₅
D)XeF₂
E)XeF₄

Question 60

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 61

What is the hybridization of the As atom in the AsF₅ molecule?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 62

What is the hybridization of As in the AsF₄^- ion?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 63

Consider the species Cl₂⁺, Cl₂, and Cl₂^-. Which of these species will be paramagnetic?

A)only Cl₂
B)Cl₂⁺ and Cl₂
C)Cl₂ and Cl₂^-
D)Cl₂⁺ and Cl₂^-
E)all three are paramagnetic

Question 64

The number of pi bonds in the molecule below is

A)2.
B)4.
C)6.
D)10.
E)15.

Question 65

In which of these molecules do the two nitrogen atoms have different hybridizations?

A)NH₄NO₃
B)N₂H₄
C)N₂O₄
D)N₂O₅
E)none of these

Question 66

Which of the following molecules have the same geometries?

A)SF₄ and CH₄
B)CO₂ and H₂O
C)CO₂ and BeH₂
D)N₂O and NO₂

Question 67

What is the hybridization of the iodine atom in the IF₅ molecule?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 68

Indicate the type of hybrid orbitals used by the central atom in CCl₄.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 69

Indicate the type of hybrid orbitals used by the central atom in BrF₃.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 70

What is the hybridization of the central atom in ClO₃^- ?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 71

Indicate the type of hybrid orbitals used by the central atom in SF₆.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 72

Consider the species O₂^-, O₂, and O₂⁺. Which of these species will be paramagnetic?

A)O₂ and O₂^-
B)O₂⁺ and O₂
C)O₂⁺ and O₂^-
D)only O₂
E)all three are paramagnetic

Question 73

Indicate the type of hybrid orbitals used by the central atom in TeF₄.

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 74

Which of the following species have the same geometries?

A)NH₂^- and H₂O
B)NH₂^- and BeH₂
C)H₂O and BeH₂
D)NH₂^-, H₂O, and BeH₂

Question 75

If a triatomic molecule is linear, then the hybridization of the central atom will be

A)sp.
B)sp².
C)sp or sp³.
D)sp or sp³d.
E)sp² or sp³d².

Question 76

The hybridization of the central nitrogen atom in the molecule N₂O is

A)sp.
B)sp².
C)sp³.
D)sp³d.
E)sp³d².

Question 77

The number of pi bonds in the molecule below is

A)1.
B)2.
C)3.
D)5.
E)9.

Question 78

In which one of the following molecules is the central atom sp² hybridized?

A)SO₂
B)N₂O
C)BeCl₂
D)NF₃
E)PF₅

Question 79

What is the hybridization on the central atom in NO₃^- ?

A)sp
B)sp²
C)sp³
D)sp³d
E)sp³d²

Question 80

The number of pi bonds in the oxalate ion (C₂O₄^2-)is

A)1.
B)2.
C)3.
D)4.
E)5.