83. What is the highest molecular orbital degeneracy of cyclic H₃⁺?
(A)0
(B)1
(C)2
(D)3
(E)4

5. 下列哪一個化合物是順磁物質？ (A) O2 (B) CO (C) N2O4 (D) Ni(CO)4 (E) [Co(NH3)6]Cl3

72. Which one of the following tetrahedral MXF- complexes has the strongest crystal field stabilization? (A) FeCl42- (B) MnCl42- (C) CoCl42- (D) NiCI42- (E) CuCI42- 

72. Chelation therapy is known as the administration of chelating agents to eliminate toxic heavy metals from the body and has been practiced for many years in clinical toxicology. EDTA is used for intravenous injection as a detoxification treatment for heavy metal ions. Which of the following statement associated with EDTA is incorrect? (A) EDTA is a hexadentate ligand. (B) The full name of EDTA is ethylenediaminetetraacetate. (C) A direct titration method is suitable for analytes that are precipitated in the absence of EDTA. (D) EDTA is commonly used as an additive for collecting whole blood and plasma specimens. (E)After complexation with Fe3+, the EDTA can be detected by UV-vis absorption spectroscopy.

46. [Co(CN)4]3–錯合物的分子形狀為平面四邊形(square planar)，請判斷中心離子未成對電子數目？ (A) 0 (B) 1 (C) 2 (D) 4

10. Which of the following represents the highest occupied molecular orbital for the conjugated pi system in the structure below? (A)(B)(C)(D)

80. What is the highest occupied molecular orbital of a C24- ion? (A)σ2s* (B) π2p (C) σ2p(D)π2p* (E) σ2p*

15. Which of the following statements is correct? (A)In HF, its bonding molecular orbital has greater H 1s character than fluorine 2p character (B) The bond strength of C2 2- is expected to strengthen as an electron is removed to form the positive charged ion (C) The bond strength of H2 is expected to increase as an electron is removed to form the positive charged ion (D) The order of increasing bond length is CO2+ > CO+ > CO (E)The bond order of CO+ is 3

31. 一處在基態(ground state)的分子其分子軌域電子組態為( 2s)2( 2s*)2( 2py)1( 2px)1。請問此分子為下列何者？ (A) Li2+ (B) C2 (C) Be2 (D) B2

27. 請問下列分子或離子何者具有順磁性(paramagnetic)？ (I) Li2 + (II) N2 (III) O2 (IV) F2 (V) N2 – (A)(I) , (III) and (V) (B)(II) , (III) and (IV)(C) (II), (IV) and (V) (D) (I) and (II)

15. 根據分子軌域理論判斷，下列何者最不穩定？ (A) H2 (B) H2+ (C) H2– (D) H22–

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