Chapter 11 Practice M/C Questions PDF

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Chapter 11 Practice Multiple Choice Questions...

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Chapter 11 Practice: 1. The lone pair of electrons on sulfur in SO2 is in A) a p orbital. B) an s orbital. C )an sp2 hybrid orbital. D) an sp3 hybrid orbital. 2. Which of the following molecules has sp3 hybridization and a dipole moment? A) SiH4 B) BF3 C) NH3 D) BrF3 E) PCl5 3. Which of the following hybridization patterns is associated with trigonal bipyramidal geometry? A) sp2 B) sp3 C) sp3d2 D) sp3d E) sp 4. Which of the following hybridization patterns best describes the central atom in H2CF2? A) sp2 B) sp3d C) sp3 D) sp E) sp3d2 5. How many bonds are present in a molecule of ethyne (acetylene), C2H2? A) 3 B) 2 C) 1 D) 0 6. Which of the following hybridization patterns best describes the carbon atom in NCO-? A) sp2 B) sp3d C) sp3 D) sp E) sp3d2 7. A carbon-carbon double bond consists of A) a σ bond and two π bonds. B) a bond π and two σ bonds. C) two σ bonds. D) two π bonds. E) a σ bond and a π bond. 8. What type orbital holds the lone pair of electrons on nitrogen in H2CNH? A) 2s B) 2px C) sp D) sp2 E) sp3

9. In a carbon-carbon triple bond, what is the nature of the bonding between the carbons? A) two 2s orbitals overlapping B) two 2p orbitals overlapping C) two sp orbitals overlapping, two 2pyoverlapping and two 2pz overlapping D) an sp and sp2 overlapping and 2p orbitals overlapping E) an sp2 and sp2 overlapping and 2p orbitals overlapping 10. Which type of hybrid orbital on carbon is associated with bonds having restricted rotation? A) sp B) sp2 C) sp3 D) sp3d E) sp3d2 11. When the nitrogen molecule, N2, loses an electron, A) the ion formed will be less stable than N2. B) the ion formed will be more stable than N2. C) the stability of the ion formed will be the same as that of N2. D) the bond length of ion will be shorter than the bond length of N2. 12. According to the molecular orbital model, which is the least stable? A) He2 B) Li2 C) B2 D) C2 E) NO 13. According to molecular orbital theory, what is the bond order in F2+? A) 1 B) 1.5 C) 2 D) 2.5 E) 3.0 14. According to the molecular orbital model, the highest occupied molecular orbital of O2 is A) σ2s B) π2p C) σ*2s D) π*2p E) σ*2p 15. Consider benzene (C6H6), carbonate ion (CO32-) and water (H2O). Of these three species, which one(s) has/have delocalized molecular orbitals? A) only benzene B) only carbonate C) only water D) benzene and water E) benzene and carbonate 16. The lone pair of electrons on sulfur in the sulfite ion (SO2− 3) is in A) a p orbital. B) an s orbital. C) an sp2 hybrid orbital. D) an sp3 hybrid orbital. E) none of the above orbital types.

17. Which has sp3d hybridization and no dipole moment? A) PCl3 B) BF3 C) SF4 D) BrF3 E) PCl5 18. Which of the following hybridization patterns is associated with octahedral geometry? A) sp2 B) sp3 C) sp3d2 D) sp3d E) sp 19. Which hybrid orbitals are associated with bond angles of 90° and 120° at the central atom? A) sp3 B) sp3d2 C) sp D) sp2 E) sp3d 20. Which carbon orbitals would be involved in the formation of the hybrid orbitals that are present in ethyne (acetylene), HCCH? A)1s, 2s, 2px B)1s, 2s, 2px, 2py C)2s, 2px D)2s, 2px, 2py E)2s, 2px, 2py, 2pz 21. For the following molecule, what is the hybridization for each carbon?

A) sp B) sp5 C) sd4 D) sp2 E) sp3 22. In H2CNH, which orbitals overlap in forming the NC bond? A) 1s overlaps with 2s B) sp overlaps with 1s C) sp2 overlaps with 1s D) sp2 overlaps with sp2 E) sp2 overlaps with sp2 and 2p overlaps with 2p 23. The carbon atoms in ethyne (acetylene, C2H2) are joined by a triple bond. The bonds in this compound consist of: A) 6 electrons, 3 orbitals, and 5 lobes B) 6 electrons, 3 orbitals, and 4 lobes C) 4 electrons, 3 orbitals, and 4 lobes D) 4 electrons, 2 orbitals, and 2 lobes E) 4 electrons, 2 orbitals, and 4 lobes

24. Which of the following molecules will not have a bond? A) C2H2 B) C2H6 C) N2H2 D) None of the above. E)All of the above. 25. Which of the substituted ethylene molecules listed can exist in both cis- and trans- forms? A) H2C=CH2 B) H2C=CF2 C) HFC=CF2 D) HFC=CHF E) HFC=CH2 26. According to molecular orbital theory, in the O2+ ion, how many valence electrons are in antibonding molecular orbitals? A) 6 B) 5 C) 4 D) 3 E) 2 27.Which is the correct order for the oxygen-oxygen bond length? A) HOOH>O2->O2+>O2 B) HOOH>O2->O2>O2+ C) HOOH...