1307Finaltest

1307Finaltest - MULTIPLE CHOICE. Choose the one alternative...

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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. Which one of the following Lewis structures is definitely incorrect? (A) a (B) b (C) c (D) d (E) e 2. Select the correct Lewis structure for NOCl, a reactive material used as an ionizing solvent. (A) a (B) b (C) c (D) d (E) e 3. What is the molecular shape of HOF as predicted by the VSEPR theory? (A) trigonal pyramidal (B) trigonal planar (C) tetrahedral (D) linear (E) bent 4. In which one of the following is the best Lewis structure a resonance structure? (A) SO 3 (B) BF 3 (C) I 3- (D) CO (E) CCl 4 5. Select the Lewis structure in which formal charges are minimized for the periodate anion, IO 4- . (A) a (B) b (C) c (D) d (E) e 6. In a molecule having five electrons groups around the central atom and a T-shape, how many lone electron pairs of electrons does the central atom have? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 7. In which one of the following species is the central atom (the first atom in the formula) an exception to the octet rule? (A) NH 3 (B) NH 4 + (C) I 2 (D) BH 4- (E) SF 6 8. Which of the following atoms can expand its valence shell when bonding? (A) N (B) C (C) O (D) P (E) None of above 9. According to VSEPR theory, a molecule with the general formula AX 3 E will have a _____ molecular shape. (A: central atom; X: bonding atom; E: lone pair on central atom) (A) bent (B) trigonal planar (C) trigonal pyramidal (D) tetrahedral (E) trigonal bipyramidal 10. 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) AlCl 4- (B) NH 3 (C) PCl 5 (D) CO 2 (E) H 2 O 11. Which one of the following molecules does not have a dipole moment? (A) CS 2 (B) H 2 S (C) CH 2 Cl 2 (D) PF 3 (E) CH 2 O 12. A molecule with the formula AX 4 E uses __________ to form its bonds. (A) sp hybrid orbitals (B) sp 2 hybrid orbitals (C) sp 3 hybrid orbitals (D) sp 3 d hybrid orbitals (E) sp 3 d 2 hybrid orbitals 13. The hybridization on N in the NH 3 molecule is _________ (A) sp (B) sp 2 (C) sp 3 (D) sp 3 d (E) sp 3 d 2 14. When PCl 5 solidifies it forms PCl 4 + cations and PCl 6- anions. According to valence bond theory, what hybrid orbitals are used by phosphorus in the PCl 4 + and PCl 6- ions? (A) sp 2 , and sp 3 (B) sp 2 d , and sp 3 d 2 (C) sp 3 , and sp 3 d (D) sp 3 , and sp 3 d 2 (E) sp 3 , and sp 3 15. According to valence bond theory, which of the following molecules involves sp 2 hybridization of orbitals on the central atom? (central atom is italic ) (A) C 2 H 2 (B) C 2 H 4 (C) C 2 H 6 (D) C O 2 (E) H 2 O 16. According to molecular orbital theory, what is the bond order in the O 2 + ion?ion?...
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1307Finaltest - MULTIPLE CHOICE. Choose the one alternative...

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