11. A I₂ +B OH^-→ CI^- + D IO₃^-+ E H₂O, please confirm which value is not right for A, B, C, D, and E.
(A) A = 3
(B) B = 4
(C) C= 5
(D) D=1
(E) E=3

12. Isomerism is important in the coordination chemistry. Which description is correct? (A) Linkage isomers: [PtCI2(NH3)4]Br2 vs [PtBr2(NH3)4]Cl2(B) Coordination isomers: [Co(NH3)5(NO2)2+ -O—N—O or-NO2 (C) Hydrate isomers: [Cr(H2O)6]Cl3; [Cr(H2O)5]CI2•H2O;[Cr(H2O)4CI2]Cl•2H2O (D) Ionization isomers: [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] (E) None of above is correct.

13. X-ray is discovered by Wilhelm Conrad Rontgen and widely used in different areas. About the X-ray, which one is incorrect? (A) The wavelength of X-ray is shorter than that of visible light. (B) X-ray was discovered when Rontgen operated the cathodic tube. (C) X-ray diffraction (XRD) over the crystal is a kind of inelastic scattering. (D) The soft X-ray dissipates quickly at ambient. (E) Bragg equation: 2dsinθ= nλ

14. A chemical bond length is closed to: (A) 10 mm, (B) 1 nm, (C) 0.1 nm (D) 0.1 pm or (E) 1 pm.

15. A C–C bond dissociation energy is closed 1o: (A) 1 kcal/mol. (B) 10 kcal/mol. (C) 100 kcal/mol. or (D) 1000 kcal/mol.

16. The complex that does not obey 1 8-electron rule is: (A) [(η5-C5H5)FECI(CO)(PPh3)] (B)[Cr(CO)3(SiMe3)(Cl)(NCMe)2] (C) [Co(PPh3)2(AsPh2)CI3]- (D) [Os(N)Br2(PMe3)(NMe2)]- (E) (Fe(NMe3)6]2+

17. Complexes of general formula. fac-[Mo CO)3(phosphine):] have the C-O stretching frequencies as given below.Phosphines: ( A ) PMe3: ( B ) PPh2CI； ( C ) PF3； ( D ) PCI3One of vco (cm-1) of higher frequency: (i) 2090: (i) 2040； (iii) 1977: (iv) 1945The correct combination of phosphine and stretching frequency is (A) ( A )-(i)； ( B )-(ii): ( C )-(iii): ( D )-(iv) (B) ( A )-(iv): ( B )-(iii)； ( C )-(ii): ( D )-(i) (C) ( A )-(iv): ( B )-(i): ( C )-(iii)； ( D )-(ii) (D) ( A )-(iv): ( B )-(iii): ( C )-(i)； ( D )-(ii) (E) ( A )-(i):( B )-(iv)； ( C )-(iii): ( D )-(ii)

18. Given a qualitative d orbital splitting diagrams of three-fold symmetric homobimetallic complexes shown on the right. The metal-netal bond order of [W2Cl6] is likely to be:(A) 1.(B) 2, (C)3. (D)4. or (E) 5.

19. The complex ion [Cr(CN)6]4- has magnetic properties that correspond to how many unpaired electrons? (A)0.(B)1. (C)2, (D) 3. (E) 4.

20. Ethylenediaminetetraacetic acid (EDTA) is: (A) not useful as a chelating agent. (B) an effective antidote for heavy metal poisoning (e.g. Pb2- and Hg2- ). (C) a monodentate ligand. (D) known to form unstable complex ions with Fe3-. Hg2-, and Zn2-, (E) known to form complexes with platinums that inhibit the growth of cancerous cells.

21. Solutions of the complexes [Co(NH3)6]3- ( A ). [Co(H2O)6]3-( B ), and [CoCl4]4- ( C ) are colored. One is purple. another is yellow, and the third is blue. Which of the following combination is correct? A color wheel shown below is helpful in determining this relationship.(A) A : bule: B: yellow； C: purple  (B) A : yellow: B: blue: C: purple (C) A: purple； B: yeillow； C: blue Ccan (D) A: yellow； B: purple； C: blue (E) A : bule； B: purple: C: yellow 

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