6. The quantum numbers (4, 3, 0, +1/2) represent an excited state electron except for
(A) Silver
(B) Scandium
(C) Cesium
(D) Zirconium
(E) Tungsten

7. Arrange the following bonds in order of decreasing bond strength (A) F-F ＞ Cl-Cl ＞ Br-Br ＞ I-I (B) Cl-Cl ＞ F-F ＞ Br-Br ＞ I-I (C) Cl-Cl ＞ Br-Br ＞ F-F ＞ I-I (D) F-F ＞ Cl-Cl ＞ I-I ＞ Br-Br (E) Cl-Cl ＞ Br-Br ＞ I-I ＞ F-F

8. How many σ and π bonds are there in the Lewis structure of sulfite ion which minimizes formal charges? What is the molecular geometry? (A) 4 σ bonds, 2 π bonds, tetrahedral (B) 3 σ bonds, 1 π bonds, trigonal pyramidal (C) 4 σ bonds, 0 π bonds, tetrahedral (D) 3 σ bonds, 3 π bonds, trigonal planar (E) 3 σ bonds, 0 π bonds, trigonal planar

9. Among the following diatomic molecules, how many molecules will their bond length decrease when they obtain one extra electron? Li2, B2, C2, N2, O2, F2, NO, CN (A) 2 (B) 3 (C) 4 (D) 5 (E) 6

10. Predict the smallest actual bond angle in IBr3 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°

11. Considering X-axis as the internuclear axis for N2, what kind of the molecular orbitals will be formed when ? (A) (B) (C) (D) (E)

12. When one mole of a real gas isothermally expands from 1 L to 2 L against a vacuum, which is the correct expression? (A) q = 0 and ΔS ＞ 0 (B) w = 0 and ΔU = 0 (C) w = 0 and ΔS = 0 (D) q = 0 and ΔS = 0 (E) w = 0 and ΔS ＞ 0 

13. Which is the correct description? (A) An atom with the electronic configuration [Kr] has one valence electrons. (B) Thallium is a transition metal atom. (C) are isoelectronic. (D) The effective nuclear charge can be larger than the actual nuclear charge Z. (E) Europium and californium belong to lanthanides.

14. Germanium crystallizes in a cubic lattice. The atomic mass and radius of a germanium atom are 72.6 g. and 123 pm respectively. The unit cell edge length is 566 pm. The density of germanium is 5.33 g.. How many germanium atoms are there in a unit cell? (A) 2 (B) 4 (C) 8 (D) 12 (E) 24

15. Consider the van der Waals coefficients in the following table, which molecule may have the strongest attractive intermolecular interactions? (A) Benzene (B) Ammonia (C) Chlorine (D) Diethyl ether (E) Water

16. Consider the following statements: a. Real gases act more like ideal gases as the pressure increases.  b. The Maxwell speed distribution graph for different molecules shows that heavier molecules travel with speeds close to their average values than the lighter ones.  c. At 1 atm and 273 K, every molecule in a sample of a gas has the same speed.  d. The kinetic model of gases states that gas particles move in ordered and non-random motions. e. At constant T, Xe molecules at 1 atm and He molecules at 5 atm both have the same average kinetic energy. Which of these statements are true? (A) a and d (B) b and e (C) a and e (D) b and e (E) a and c 

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