34. Which of the following structures represent aromatic compounds?
(A) Only I, II and III
(B) Only I, III and IV
(C) Only I, II, and IV
(D) Only II, III and IV
(E) I, II, III and IV

30. The nitrosonium ion, NO+, forms numerous fascinating complexes with nickel, cobalt, and iron. Based on molecular orbital theory, which of the following statements accurately describes NO+? (A) The nitrosonium ion, NO+, possesses a bond order of 2 and exhibits paramagnetism (B) The nitrosonium ion, NO+, possesses a bond order of 2 and exhibits diamagnetism (C) The nitrosonium ion, NO+, possesses a bond order of 3 and exhibits paramagnetism (D) The nitrosonium ion, NO+, possesses a bond order of 3 and exhibits diamagnetism (E) None of these choices are correct

31. At pH 8.0, the predominant form of ethylenediaminetetraacetic acid (EDTA; H4Y: K1= 1.02 x 10-2, K2 = 2.14 x 10-3, K3 = 6.92 x 10-7, K4 = 5.50 x 10-11) is (A) H3Y- (B)H2Y2- (C) HY3- (D) Equal amounts of H2Y2- and HY3- (E)Y4-

32. For a reaction producing both kinetic and thermodynamic products, which of the followings are linked to the kinetic product? (I) It is formed faster. (II) It is the more stable product.(III) l) It involves the lower energy transition state.(IV) ) It is favored with cold reaction conditions. (A) Only I (B) Only I, III and IV (C) Only II (D) Only II, III and IV (E) Only III

33. How many lone pairs of electrons are in the Lewis structure of D-glucose (C6H12O6 = 180.16 g mol- 1)? (A) 4 (B)6 (C)8 (D)9 (E)12

35. Based on the molecular orbital diagram shown below, which one is the most stable species? (A) NO2- (B)NO- (C)NO (D)NO+ (E) NO2+

36. Give the ground state electron configuration for Se2-. (A) [Ar]4s24p6 (B) [Ar]4s23d104p2 (C) [Ar]4s23d84p6 (D) [Ar]4s23d104p6 (E) [Ar]4s23d104p4

37. Displayed below is a step in the catalytic cycle of the Suzuki reaction, with 'L' representing a ligand. Which term from the provided options best describes this step?(A) Oxidative addition (B) Reductive elimination (C) Transmetallation (D) Nucleophilic substitution (E) None of the above

38. Which carbon atom is referred to as the anomeric carbon? (A)l (B)2 (C)3 (D)4 (E)5

39. Which complex ion, assuming M is the metal ion and X and Y are ligands in an octahedral geometry, can display geometric isomerism? (A) [MX6]2+ (B) [MX5Y]2+ (C) [MX4Y2]2+ (D) [MX3Y3]2+ (E) None of the above

40. A solution is prepared by mixing 2.0 M H3A and 2.0 M NaH2A in the equal volume (H3A: pXa1 = 2.10, pXa2 = 7.20, pXa3 = 12.30). Which one is the closest to the pH value of this mixture? (A) 2.10 (B) 2.45 (C) 4.65 (D) 7.20 (E) 9.75