AP BONDING REVIEW

1. AP BONDING REVIEW

2. Take out a sheet of paper… • You may not use your notes. • You may not use each other- no talking! • Show work if necessary • Box the correct answer choice (A, B, C, D, E) after solving the problem.

3. Don’t forget… • Today is the day before the exam… that means you may not ask questions regarding the exam/get help today! You waited until the last minute!!! • Every exam is cumulative- make sure you review all previous units! • Exams will cover all material from class and from the book…this is why you take notes and it is recommended that you read the chapter THREE times before an exam.

4. 1. Which of the atoms below is least likely to violate the octet rule? • a) Be • b) P • c) S • d) B • e) F

5. 2. How many electrons are shown in the Lewis structure of perchlorate ion, ClO4–? • a) 30 • b) 31 • c) 32 • d) 50 • e) 51

6. 3. What is the bond order of the C–O bond in • a) 4 • b) 1.5 • c) 0.5 • d) 1 • e) 2

7. 4. Which of the following is the correct Lewis structure for SOCl2? (Consider formal charge) • a) • b) • c) • d) • e)

8. 5. As the bond order of a carbon-carbon bond increases, which one of the following decreases? a) # of electrons between the carbon atoms b) vibrational frequency of bond vibrations c) bond energy (bond strength) d) bond length

9. 6. Which of the following molecular shapes has six atoms joined to a central atom? • a) linear • b) tetrahedral • c) octahedral • d) trigonal bipyramid • e) planar triangular

10. 7. Which molecular shape has bond angles which are not all the same? • a) linear • b) tetrahedral • c) octahedral • d) planar triangular • e) trigonal bipyramid

11. 8. The molecule BrF3 has how many lone pairs of electrons on the central atom? • a) 0 • b) 1 • c) 2 • d) 3

12. 9. What is the geometrical arrangement of electron pairs in H2O? • a) linear • b) bent • c) octahedral • d) trigonal bipyramidal • e) tetrahedral

13. 10. What is the shape of BrI3? • a) square planar • b) T-shaped • c) distorted tetrahedral • d) pyramidal • e) bent

14. 11. What is the shape of the IF4– ion? • a) square planar • b) tetrahedral • c) square pyramidal • d) octahedral • e) T-shaped

15. 12. Which of the following is a polar species? • a) CO2 • b) PCl5 • c) ICl2– • d) TeCl4 • e) CCl4

16. 13. What is the hybridization of Br in BrF3? • a) sp • b) sp2 • c) sp3 • d) sp3d • e) sp3d2

17. 14. What type of hybridization is associated with a square planar molecular shape? • a) sp3 • b) sp2 • c) sp • d) sp3d • e) sp3d2

18. 15. What shape for electron pairs is associated with sp3d2 hybridization? • a) linear • b) square planar • c) bent • d) tetrahedral • e) octahedral

19. 16. What hybridization is predicted for phosphorus in the PCl3 molecule? • a) sp2 • b) sp3 • c) sp • d) sp3d2

20. 17. A double bond contains ___ sigma bond(s) and ___ pi bond(s). • a) 0, 2 • b) 1, 2 • c) 2, 0 • d) 1, 1

21. 18. What angle exists between orbitals in sp3d2 hybrid orbitals? • a) 90.0° • b) 180.0° • c) 109.5° • d) 120.0° • e) 78.5°

22. 19. Which of the following elements is most likely to display sp3d hybridization? • a) oxygen • b) nitrogen • c) phosphorus • d) carbon • e) boron

23. 20. What is the hybridization of the oxygen atoms in CH3OH and CO2, respectively? • a) sp3, sp3 • b) sp3, sp2 • c) sp2, sp3 • d) sp2, sp2 • e) sp3, sp

24. 21. All of the following species contain two pi-bonds EXCEPT • a) SCN- • b) CO • c) H2CCO • d) OCS • e) NO-

25. 22. Which response contains all the characteristics that should apply to BF3? 1. trigonal planar 2. one unshared pair of electrons on B 3. sp2 hybridized boron atom 4. polar molecule 5. polar bonds a) 2, 4, and 5 d) 1, 3, and 5 b) 1, 3, and 4 e) 3, 4, and 5 c) 1, 2, and 3

26. 23. Which of the following bonds is most polar? • a) N – Cl • b) C – N • c) S – S • d) Br – Br • e) S – O

27. 24. Which one of the following molecules is a polar molecule? • a) • b) • c) • d)

28. Answers 1. e 11. a 21. e 2. c 12. d 22. d 3. e 13. d 23. e 4. b 14. e 24. b 5. d 15. e 6. c 16. b 7. e 17. d 8. c 18. a 9. e 19. c 10. b 20. c