112年 - 112 台灣聯合大學系統_碩士班招生考試_化學類:無機化學#117893

科目：研究所、轉學考(插大)◆無機化學 | 年份：112年 | 選擇題數：40 | 申論題數：0

試卷資訊

所屬科目：研究所、轉學考(插大)◆無機化學

選擇題 (40)

1. Which pair of the molecule and point group is correct? (A) CH2Cl2, Td (B) CHC13, C3v (C) CCl4,D4d (D) CCl2Br2,C2h
2. An Oh XY6 molecule exhibits two Tru, IR active modes. Which statement is true? (A) Each Tiu mode is triply degenerate, and each gives rise to one absorption in the IR spectrum of XY6  (B) Each Tiu mode is triply degenerate, and each gives rise to three absorptions in the IR spectrum of XY6 (C) Each Tlu mode is non-degenerate, and gives rise to one absorption in the IR spectrum of XY6 (D) One of the Tiu modes is the symmetric stretching mode of XY6
3. Elemental analytical data for a new, monomeric compound X is a requirement of publishing details of the compound in the literature, even when crystallographic and spectroscopic data are available. This is because: (A) elemental analysis is a requirement purely for historical reasons (B) elemental analysis is the only method of confirming that the compound contains no solvate (C) elemental analysis confirms the composition of the bulk sample (D) elemental analysis confirms that the compound is a monomer and not a dimer or higher oligomer
4. You are trying to find out if a thiocyanate ligand, [NCS] -, is bonded to a metal ion through the N or S atom. Which technique would be MOST useful to you? (A) 13C NMR spectroscopy(B) mass spectrometry (C) UV-VIS spectroscopy (D) IR spectroscopy
5. Which statement is true about orbitals with  t2g  symmetry? (A) MOs with t2g symmetry are found for molecules belonging to the Id point group (B) Each MO in a tig set of orbitals is centrosymmetric (C) A set of t2g MOs consists of two degenerate orbitals (D) MOs with t2g symmetry are found for molecules belonging to the C2v point group
6. Which of the following does not contain a C3 axis? (A)POCl3 (B)[NH4]+ (C)[H3O]+(D) CIF3
7. In order to describe the bonding in some compounds, it is necessary to invoke 3-centre 2-electron interactions. In which one of the following are such interactions usually invoked? (A) (BeH2)n (B) Al2Cl6 (C) (BeCl2)n (D) Si2H
8. A unit cell of ReO3 consists of a cubic arrangement of Re atoms with O atoms centered along each edge of the cube. The coordination number of each Re atom is: (A)6 (B)3 (C)8 (D)2

9. Which statement is incorrect? (A) CaO crystallizes with the CsCI structure (B) Wurtzite and zinc blende are polymorphs of ZnS (C) β-Cristobalite is one crystalline form of SiO2 (D) CaTiO3 (perovskite) is an example of a double oxide
10. Within the principle of hard and soft acids and bases (HSAB), which pair of metal ion and donor atom is BEST matched? (A) Al3+ and O(B) Ag+ and O(C) Li+ and S(D) Ca2+ and S
11. When [EDTA]4- coordinates to a metal ion, M2+, to give [M(EDTA)]2-, the number of chelate rings formed is: (A)4 (B)5 (C)6 (D)3

12. A potential (Latimer) diagram shows the following data:

What is the value of x? (A)-0.44 (B)-0.81 (C)-0.40 (D)+0.73
13. The pKa of HNO2 is 3.37. The pH of a 0.01 mol dm-3 aqueous solution of HNO2 is: (A)5.37 (B)2.69 (C) 1.69 (D)0.69

14. In neutral aqueous solution,E°for the Mn3+/Mn2+ couple is +1.54 V. At pH 14,E°for the Mn(OH)3/Mn(OH)2 couple is t0.15 V. Which of the following statements is incorrect? (A) At pH 14, Mn(II) and Mn(III) both precipitate from aqueous solution as hydroxides (B) Mn(III) is less stable with respect to reduction to Mn(II) at pH 14 than at pH 7 (C) The Mn(OH)3/Mn(OH)2 couple refers to an equilibrium involving Mn(III) and Mn(II) (D) At pH 7, Mn3+(aq) is a relatively strong oxidizing agent
15. A superacid is a stronger acid than? (A) anhydrous HCI(B) anhydrous HClO4 (C) anhydrous H2SO4 (D) anhydrous HNO3
16. Which of the following behaves as a base in liquid HF? (A) HOSO3F (B) BF3 (C) PF5 (D) BrF3
17. How many stereoisomeric forms of each of square-planar [PtCl2(NH3)2] and tetrahedral [NiCl2(PPh3)2] are there (A)[PtCI2(NH3)2], two, [NiCl2(PPh3)2],two (B) [PtCl2(NH3)2], two；[NiCl2(PPh3)2],one (C) [PtCI2(NH3)2], one；[NiCl2(PPh3)2],one (D) [PtCI2(PPh3)2], one； [NiCl2(PPh3)2],two
18. Cis- and trans-isomers of square planar [PtCI2(PPh3)2] can be distinguished by several methods. Which statement is incorrect? (A) cis-[PtCI2(PPh3)2] has two IR active Pt-CI stretching modes but trans-[PtCl2(PPh3)2] has only one (B) In the 31P NMR spectrum, the observed J(31P31P) for trans-PtCl2(PPh3)2 is greater than that for cis- [PtCl2(PPh3)2] (C) The value of J1p195Pt) for cis-[PtCl2(PPh3)2] is greater than that for trans-(PtCl2(PPh3)2] (D) X-ray crystallography would definitively distinguish between the isomers
19. Which of the following correctly places the metal centres in their order in the spectrochemical series? (A) Pd(II) ＜Ni(Il) ＜Pt(IV) (B) Co(III) ＜Co(II)＜Rh(III) (C) Pt(IV) ＜Pd(II) ＜Ni(II) (D) Mn(II) ＜ Fe(III) ＜ Rh(III)
20. Which metal complex ion is expected to be subject to a Jahn-Teller distortion? (A)[Cr(OH2)6]3+(B)[Cr(NH3)6]2+(C)[Cr(CN)6]3-(D)[Cr(bpy)3]2+
21. Scanning tunnelling microscopy (STM) could be used to reveal what features of a metal surface? (A) step-edges and adsorbed species (B) elemental composition of the surface (C) oxidation states of adsorbed atoms (D) oxidation states of bulk and surface metal atoms
22. For which of the following might you use a Hoveyda-Grubbs' second generation catalyst? (A)alkene metathesis (B) hydroformylation (C) alkene hydrogenation (D) ethene epoxidation
23. The reactions of [PtCI4]2- with NH3 (reaction I) and of [PtCl4]2- with [NO2]- followed by NH3 (reaction II) are ways of preparing: (A) I: trans-[PtCI2(NH3)2]； II: trans-[PtCl2(NH3)(NO2)]- (B) I: cis-[PtCl2(NH3)2]:II:trans-[PtCl2(NH3)(NO2)]- (C) I: cis-[PtCl2(NH3)2]； II: cis-[PtCl2(NH3)(NO2)]- (D) I: trans-(PtCl2(NH3)2]: II: cis-[PtCl2(NH3)(NO2)]-
24. The first step in the Eigen-Wilkins mechanism for ML6 undergoing Y for L substitution is: (A) loss of L (B) addition of Y (C) formation of a weakly bound encounter complex (D) formation of a 7-coordinate complex in the rate-determining step
25. Match the structure type to the stated compound. Which pair is incorrect? (A) CoF2； rutile structure type (B) TiO； rock salt structure type (C) ZnS； zinc blende structure type (D) FeF2； anti-fluorite structure type

26. Which of the following is a π-donor ligand? (A)Cl- (B)NH3 (C)CO (D)PF3
27. Match the M-M bond orders to the species given. Which pair is incorrect? (A) [Re2Cl8]2-； Re-Re bond order = 4 (B) [W2Cl9]3-； W-W bond order = 3 (C) [Mo2Cl8]4- ； Mo-Mo bond order = 4 (D) [Os2CI8]2-；Os-Os bond order = 4

28. Which statement about organoaluminium compounds is incorrect? (A) Dimers of AlMe3 possess delocalized Al-C-Al bonding interactions (B) The bonding in AI2Me4Cl2 can be described in terms of a localized scheme (C)In Al2Ph4(μ-C≡CPh)2, the bridge bonds can be described in a similar way to those in Al2Me4(μ-Ph)2 (D) Al2{CH(SiMe3)2}4 contains an Al-Al bond
29. Which statement is correct regarding the covalent bond classification (CBC)? (A) L is a 2-electron donor, Z is a l-electron donor and X donates 0 electrons (B) L is a 2-electron donor, X is a L -electron donor and Z donates 0 electrons (C) X is a 2-electron donor, Z is a 1 -electron donor and L donates O electrons (D) Z is a 2-electron donor, L is a 1 -electron donor and X donates 0 electrons
30. Which statement is incorrect about complexes formed by the lanthanoids? (A) Hard donor ligands are favored (B) High coordination numbers are often observed (C) The 4f atomic orbitals do not play a significant part in metal--ligand bonding (D) Aqua ions are typically 6-coordinate
31. Band gaps affect semiconducting properties. Which is the correct ordering of band gaps in these III-V semiconductors? (A)GaSb＜InSb(B) GaP＞GaAs (C) InAs＞ InP (D) GaP ＜ Si
32. Which statement correctly describes the function of cytochromes P-450? (A) Cytochromes P-450 act as monooxygenases and catalyze the insertion of O into a C-H bond (B) Cytochromes P-450 couple to cytochrome c in the mitochondrial electron-transfer chain (C) Cytochromes P-450 act as dioxygenases (D) Cytochromes P-450 contain high-spin Fe(IIl)； this directly binds O2 and acts as an O2 carrier
33. Enantiomers of [Cr(oxalate)3]3- are: (A) related by a rotation axis(B) diastereoisomers (C) structural isomers (D) stereoisomers
34. To compare the electronic absorption spectra of three iron(Il) complexes, you want to combine the three spectra in one plot. You should plot: (A) extinction coefficient against wavelength (B) absorbance against wavelength (C) extinction coefficient against concentration (D) absorbance against wavenumber
35. In an MO diagram for the formation of H2O in which the z axis bisects the H-O-H angle and the molecular is on the xz plane: (A) the O 2pz atomic orbital interacts with an in-phase combination of H 1s atomic orbitals (B) the O 2py atomic orbital interacts with an out-of-phase combination of H 1s atomic orbitals (C) the O 2px atomic orbital is non-bonding (D) the O 2s atomic orbital is non-bonding
36. Which statement is incorrect about a cubic close-packed lattice? (A) All atoms have a coordination number of 12 (B) The lattice contains both tetrahedral and octahedral holes (C) Layers of close-packed atoms are stacked in an ABABAB... pattern (D) The packing is more efficient than in a body-centred cubic lattice

37. For the cell: 2Ag+(aq) + Zn(s) →2Ag(s)+ Zn2+(aq) E°cell = 1.56 V The value of △G'°is: (A) -150 kJ per mole of Zn (B) -602 kJ per mole of Ag (C) -301 kJ per mole of Ag (D) -301 kJ per mole of Zn
38. Comparing H2O and NHs as solvents leads to analogies between which pair of species? (A) NH3 and [OH]- (B) [NH2]- and H2O (C) [NH2]- and [OH]-(D) [NH4]+ and H2O
39. Match the compound formula to its application as a catalyst or catalyst precursor in the stated process. Which pair is incorrect? (A) cis-[Rh(CO)2I2]- ； Monsanto acetic acid synthesis (B) RhCI(PPh3)3； alkene hydrogenation (C) HRh(PPh3)3； asymmetric hydrogenation (D) HCo(CO)4, hydroformy lation of alkenes
40. The usual form of the experimental rate law for substitution in square planar Pt(I) complexes contains two terms: Rate =k1[PtL3X] + k2[PtL3X][Y] where PtL3X is the starting complex and Y is the entering group. The reason for the two-term law is that: (A) there are competitive associative and dissociative pathways (B) there are two competing dissociative pathways (C) the solvent enters in the rate-determining step, and then two competing fast steps follow (D) the solvent competes with Y in the rate-determining step

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