Ch.10 The Shapes Of Molecules Test Bank Docx

Chapter 10 Test Bank

The Shapes of Molecules

1. In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

A. 5 and 6

B. 4 and 2

C. 3 and 6

D. 4 and 6

E. 3 and 2

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Octet Rule

Topic: Molecular Shape

2. Which one of the following Lewis structures is definitely incorrect?

A. A

B. B

C. C

D. D

E. E

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

3. Which one of the following Lewis structures is definitely incorrect?

A.

B.

C.

D.

E.

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

4. Which one of the following Lewis structures is definitely incorrect?

A. A

B. B

C. C

D. D

E. E

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

5. Select the best Lewis structure for ClCN.

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

6. Hydrazine, N₂H₄, is a good reducing agent that has been used as a component in rocket fuels. Select its Lewis structure.

A.

B.

C.

D.

E. None of these choices are correct.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

7. Select the correct Lewis structure for nitrogen trifluoride, NF₃.

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

8. Select the correct Lewis structure for NOCl, a reactive material used as an ionizing solvent.

A.

B.

C.

D.

E. None of these choices are correct.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

9. Oxygen difluoride is a powerful oxidizing and fluorinating agent. Select its Lewis structure.

A.

B.

C.

D.

E. None of these choices are correct.

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

10. Select the best Lewis structure for P₂I₄.

A.

B.

C.

D.

E. None of these choices are correct.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

11. Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl₂.

A.

B.

C.

D.

E. None of these choices are correct.

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

12. Select the correct Lewis structure for TeBr₂.

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

13. How many electron pairs are shared between the carbon atoms in C₂H₄?

A. 5

B. 4

C. 3

D. 2

E. 1

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

14. In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

A. 0

B. 1

C. 2

D. 3

E. 4

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

15. Which one of the following molecules contains a double bond?

A. N₂

B. PCl₅

C. CH₂O

D. C₂H₂

E. I₂

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

16. In which one of the following molecules are all the bonds single?

A. O₃

B. POCl₃

C. CO

D. COCl₂

E. N₂H₄

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

17. In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

A. CO₂

B. ClO₃^–

C. COCl₂

D. NO₂⁺

E. HCN

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Resonance

Topic: Molecular Shape

18. In which one of the following is the best Lewis structure a resonance structure?

A. SO₃

B. BF₃

C. I₃^–

D. SCO (C = central atom)

E. SO₃^2–

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Resonance

Topic: Molecular Shape

19. In the nitrate ion (NO₃^–), nitrogen and oxygen are held together by

A. ionic interactions.

B. covalent bonds.

C. dative bonds.

D. electronegativity.

E. network bonds.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Writing Lewis Dot Structures

Topic: Molecular Shape

20. How many resonance structures are possible for NO₃^–?

A. 1

B. 2

C. 3

D. 4

E. 5

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Resonance

Topic: Molecular Shape

21. In which one of the following species is the best Lewis structure a resonance structure?

A. NH₃

B. CO₂

C. SF₆

D. O₂

E. CO₃^2–

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Resonance

Topic: Molecular Shape

22. The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

A. 2 single, 4 double

B. 4 single, 2 double

C. 4 single, no double

D. 6 single, no double

E. 5 single, 1 double

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

23. Select the Lewis structure in which formal charges are minimized for the periodate anion, IO₄^–.

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

24. Phosphoryl iodide is used in the preparation of organophosphorus derivatives and phosphate esters. Select the Lewis structure for POI₃ that minimizes formal charges.

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

25. Select the Lewis structure for XeO₂F₂ that correctly minimizes formal charges.

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

26. In the following Lewis structure for ClO₃F, chlorine has a formal charge of ____ and an oxidation number of ____.

A. 7; 7

B. 7; –1

C. 1; 1

D. 1; –1

E. 1; 7

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

27. In the following Lewis structure for phosphate, phosphorus has a formal charge of ____ and an oxidation number of ____.

A. 0; –3

B. 0; 5

C. 5; –3

D. 5; 5

E. 3; 5

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

28. In which of the following does the nitrogen atom have a formal charge of –1?

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

29. The formal charges on Cl and O in the structure shown for the ClO^– ion are, respectively

A. 0 and –1

B. –1 and 0

C. 1 and –2

D. –2 and 1

E. None of these choices are correct.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

30. In which one of the following structures does the central atom have a formal charge of +2?

A.

B.

C.

D.

E.

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

31. The formal charge on Cl in the structure shown for the perchlorate ion is

A. –2

B. –1

C. 0

D. +1

E. +2

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

32. In the COCl₂ molecule, carbon is the central atom. Based on the best Lewis structure for COCl₂, what is the formal charge on carbon?

A. 0

B. +1

C. –1

D. +2

E. –2

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

33. In which one of the following species is the central atom (the first atom in the formula) an exception to the octet rule?

A. NH₃

B. NH₄⁺

C. I₂

D. BH₄^–

E. SF₆

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Easy

Gradable: automatic

Subtopic: Exceptions to the Octet Rule

Topic: Molecular Shape

34. In which one of the following species is the central atom (the first atom in the formula) likely to violate the octet rule?

A. BF₄^–

B. XeO₃

C. SiCl₄

D. NH₃

E. CH₂Cl₂

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Exceptions to the Octet Rule

Topic: Molecular Shape

35. Which of the following atoms can expand its valence shell when bonding?

A. N

B. C

C. O

D. P

E. Al

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Exceptions to the Octet Rule

Topic: Molecular Shape

36. According to VSEPR theory, a molecule with the general formula AX₂ will have a ___ molecular shape.

A. linear

B. bent

C. trigonal planar

D. tetrahedral

E. triangular

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

37. According to VSEPR theory, a molecule with the general formula AX₃ will have a ______ molecular shape.

A. linear

B. bent

C. trigonal planar

D. tetrahedral

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

38. According to VSEPR theory, a molecule with the general formula AX₄ will have a ______ molecular shape.

A. bent

B. trigonal planar

C. trigonal pyramidal

D. square planar

E. tetrahedral

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

39. According to VSEPR theory, a molecule with the general formula AX₅ will have a ______ molecular shape.

A. tetrahedral

B. trigonal planar

C. trigonal pyramidal

D. trigonal bipyramidal

E. see-saw

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

40. Considering all the bonds in a molecule with trigonal bipyramidal geometry, what are the bond angles present?

A. 120° only

B. 90° only

C. 180° only

D. 60° and 90° only

E. 90°, 120°, and 180°

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

41. How many faces and how many vertexes (corners), respectively, are there in a trigonal bipyramid?

A. 4 and 4

B. 5 and 5

C. 5 and 6

D. 6 and 5

E. 6 and 8

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

42. According to VSEPR theory, a molecule with the general formula AX₆ will have a ______ molecular shape.

A. tetrahedral

B. trigonal planar

C. trigonal bipyramidal

D. hexagonal

E. octahedral

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

43. According to VSEPR theory, a molecule with the general formula AX₂E will have a ______ molecular shape.

A. bent

B. see-saw

C. trigonal planar

D. T-shaped

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

44. According to VSEPR theory, a molecule with the general formula AX₂E₂ will have a _____ molecular shape.

A. linear

B. bent

C. trigonal planar

D. tetrahedral

E. see-saw

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

45. According to VSEPR theory, a molecule with the general formula AX₂E₃ will have a _____ molecular shape.

A. bent

B. linear

C. trigonal planar

D. T-shaped

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

46. According to VSEPR theory, a molecule with the general formula AX₃E will have a _____ molecular shape.

A. bent

B. trigonal planar

C. trigonal pyramidal

D. tetrahedral

E. triangular

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

47. According to VSEPR theory, a molecule with the general formula AX₃E₂ will have a _____ molecular shape.

A. trigonal pyramidal

B. trigonal bipyramidal

C. trigonal planar

D. T-shaped

E. see-saw

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

48. According to VSEPR theory, a molecule with the general formula AX₄E will have a _____ molecular shape.

A. bent

B. see-saw

C. trigonal planar

D. T-shaped

E. square planar

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

49. According to VSEPR theory, a molecule with the general formula AX₄E₂ will have a _____ molecular shape.

A. tetrahedral

B. square pyramidal

C. square planar

D. octahedral

E. see-saw

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

50. According to VSEPR theory, a molecule with the general formula AX₅E will have a ______ molecular shape.

A. tetrahedral

B. trigonal bipyramidal

C. square pyramidal

D. octahedral

E. see-saw

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

51. What is the molecular shape of N₂O as predicted by the VSEPR theory?

A. trigonal pyramidal

B. trigonal planar

C. angular

D. bent

E. linear

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

52. What is the molecular shape of the thiocyanate anion, SCN^–, as predicted by the VSEPR theory? (Carbon is the central atom.)

A. linear

B. bent

C. angular

D. trigonal

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

53. What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.)

A. linear

B. bent

C. angular

D. trigonal

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

54. What is the molecular shape of BeH2 as predicted by the VSEPR theory?

A. linear

B. bent

C. angular

D. trigonal

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

55. What is the molecular shape of NOCl as predicted by the VSEPR theory?

A. linear

B. trigonal planar

C. bent

D. tetrahedral

E. trigonal pyramidal

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

56. What is the molecular shape of BCl₃ as predicted by the VSEPR theory?

A. linear

B. trigonal planar

C. bent

D. tetrahedral

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

57. What is the molecular shape of NO₂^– as predicted by the VSEPR theory?

A. linear

B. trigonal planar

C. bent

D. tetrahedral

E. resonant

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

58. What is the molecular symmetry around the carbons in CCl₂CH₂ as predicted by the VSEPR theory?

A. linear

B. trigonal planar

C. V-shaped

D. tetrahedral

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

59. What is the molecular shape of ClO₃F as predicted by the VSEPR theory?

A. trigonal pyramidal

B. square planar

C. square pyramidal

D. tetrahedral

E. octahedral

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

60. What is the molecular shape of HOF as predicted by the VSEPR theory?

A. trigonal pyramidal

B. trigonal

C. tetrahedral

D. linear

E. bent

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

61. What is the molecular shape of NH₂Cl as predicted by the VSEPR theory?

A. trigonal pyramidal

B. tetrahedral

C. T-shaped

D. see-saw

E. trigonal planar

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

62. What is the molecular shape of XeO₂F₂ as predicted by the VSEPR theory?

A. square planar

B. tetrahedral

C. square pyramidal

D. see-saw

E. octahedral

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

63. What is the molecular shape of ClF₂^– as predicted by the VSEPR theory?

A. linear

B. bent

C. see-saw

D. T-shaped

E. L-shaped

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

64. What is the molecular shape of SCl₃F as predicted by the VSEPR theory?

A. linear

B. bent

C. see-saw

D. T-shaped

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

65. What is the molecular shape of SiF₆^2– as predicted by the VSEPR theory?

A. trigonal bipyramidal

B. hexagonal

C. tetrahedral

D. see-saw

E. octahedral

Bloom's: 3. Apply

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

66. What is the molecular shape of ClF_4– as predicted by the VSEPR theory?

A. square pyramidal

B. square planar

C. see-saw

D. octahedral

E. tetrahedral

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

67. Which one of the following molecules and ions will have a planar geometry?

A. PCl₃

B. BF₄^–

C. XeF₄

D. BrF₅

E. H₃O⁺

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

68. Use VSEPR theory to decide which one of the following ions and molecules is likely to be planar. (The central atom is always first in the formula.)

A. BrF₃

B. H₃O⁺

C. PCl₃

D. SO₄^2–

E. SF₄

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

69. Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

A. PCl₃

B. BF₃

C. SO₃

D. BrF₃

E. CO₃^2–

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

70. Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF₂^–.

A. octahedral

B. trigonal bipyramidal

C. tetrahedral

D. trigonal planar

E. bent

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

71. Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90° bond angle in it. (In each case except water, the central atom is the first one in the formula.)

A. AlCl₄^–

B. NH₃

C. PCl₅

D. CO₂

E. H₂O

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

72. Predict the ideal bond angles in GeCl₄ using the molecular shape given by the VSEPR theory.

A. 90°

B. 109°

C. 120°

D. 180°

E. < 90°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

73. Predict the ideal bond angles in AsCl₃ using the molecular shape given by the VSEPR theory.

A. 90°

B. 109°

C. 120°

D. 180°

E. between 110 and 120°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

74. Predict the ideal bond angles in FNO using the molecular shape given by the VSEPR theory.

A. 90°

B. 109°

C. 120°

D. 180°

E. between 120 and 180°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

75. Predict the ideal bond angles around nitrogen in N₂F₂ using the molecular shape given by the VSEPR theory. (The two N atoms are the central atoms.)

A. 90°

B. 109°

C. 120°

D. 180°

E. between 120 and 180°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

76. Predict the ideal bond angles around carbon in C₂I₂ using the molecular shape given by the VSEPR theory.

A. 90°

B. 109°

C. 120°

D. 180°

E. None of these choices are correct.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

77. Predict the ideal bond angles in IF₂^– using the molecular shape given by the VSEPR theory.

A. 60°

B. 90°

C. 109°

D. 120°

E. 180°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

78. Predict the actual bond angle in SeCl₂ using the VSEPR theory.

A. more than 120°

B. between 109° and 120°

C. between 90° and 109°

D. exactly 90°

E. less than 90°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

79. Predict the smallest actual bond angle in BrF₃ using the VSEPR theory.

A. more than 120°

B. exactly 120°

C. between 109° and 120°

D. between 90° and 109°

E. less than 90°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

80. Predict the actual bond angles in SF₃⁺ using the VSEPR theory.

A. more than 120°

B. exactly 120°

C. between 109° and 120°

D. between 90° and 109°

E. less than 90°

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Hard

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

81. List all possible molecular geometries (shapes) for a nonpolar molecule with the formula AX₄.

A. tetrahedral

B. see-saw

C. square planar

D. either tetrahedral or square planar

E. any of the above shapes

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

82. Which of the following molecules has a net dipole moment?

A. BeCl₂

B. SF₂

C. KrF₂

D. CO₂

E. CCl₄

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

83. Which of the following has no net dipole moment?

A. N₂O

B. NF₃

C. H₂Se

D. TeO₃

E. CH₃Cl

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

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

A. SO₂

B. HCl

C. CS₂

D. CO

E. Cl₂O

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

85. Which one of the following molecules does not have a dipole moment?

A. CS₂

B. H₂S

C. CH₂Cl₂

D. PH₃

E. CH₂O

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

86. All possible resonance structures contribute equally to the resonance hybrid.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Resonance

Topic: Molecular Shape

87. When resonance occurs, the bond lengths in a molecule fluctuate rapidly.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Resonance

Topic: Molecular Shape

88. In a Lewis structure for a molecule or ion, the sum of the formal charges on the atoms is equal to the charge on the molecule or ion.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

89. In formaldehyde, CH₂O, both the formal charge and the oxidation number of carbon are zero.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Formal Charge

Topic: Molecular Shape

90. Boron never achieves an octet in any of its compounds.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Medium

Gradable: automatic

Subtopic: Exceptions to the Octet Rule

Topic: Molecular Shape

91. The Lewis structure of NO₂ violates the octet rule.

Accessibility: Keyboard Navigation

Bloom's: 3. Apply

Difficulty: Medium

Gradable: automatic

Subtopic: Exceptions to the Octet Rule

Topic: Molecular Shape

92. Bond angles of 180° only occur around atoms which display linear molecular geometry.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

93. In order for a noncyclic triatomic molecule to be bent, VSEPR theory requires that there must be two lone pairs on the central atom.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

94. According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Accessibility: Keyboard Navigation

Bloom's: 1. Remember

Difficulty: Easy

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

95. The molecule AX₂, where A and X are different elements, will have a dipole moment if the molecule is bent.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

96. A molecule that contains polar bonds will always have a dipole moment.

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Molecular Polarity (Dipole Moment)

Topic: Molecular Shape

97. In the hemoglobin molecule that carries oxygen molecules in blood, iron has 6 single bonds to surrounding atoms. What is the most likely geometry of these bonds to iron?

A. planar

B. linear

C. tetrahedral

D. octahedral

E. trigonal pyramidal

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape

Topic: Molecular Shape

98. Which of the following elements would you expect most likely to be a central atom with an expanded valence shell?

A. Ne

B. P

C. N

D. C

E. B

Accessibility: Keyboard Navigation

Bloom's: 2. Understand

Difficulty: Medium

Gradable: automatic

Subtopic: Exceptions to the Octet Rule

Topic: Molecular Shape

Category # of Questions

Accessibility: Keyboard Navigation 73

Bloom's: 1. Remember 20

Bloom's: 2. Understand 15

Bloom's: 3. Apply 63

Difficulty: Easy 25

Difficulty: Hard 13

Difficulty: Medium 60

Gradable: automatic 98

Subtopic: Exceptions to the Octet Rule 6

Subtopic: Formal Charge 13

Subtopic: Molecular Polarity (Dipole Moment) 7

Subtopic: Octet Rule 1

Subtopic: Resonance 6

Subtopic: Valence-Shell Electron-Pair Repulsion Theory (VSEPR) and Molecular Shape 49

Subtopic: Writing Lewis Dot Structures 16

Topic: Molecular Shape 98