21. What is the predicted magnetic moment for [FeCl₄]^-?

(A) 4.9 μB

(B) 1.7 μB

(C) 2.8 μB

(D) 5.9 μB

(E) 0 μB

22. Which complex below is expected to show Jahn-Teller distortion?(A) [Co(CO)6]3+(B) [Cr(CN)6]3-(C) [Mn(H2O)6]2+(D) [Fe(CO)6]2+(E) None of the above

23. In a cubic unit cell, what is the intersect angle between (100) and (110)?(A) 180°(B) 45°(C) 60°(D) 30°(E) 90°

24. In CaF2 crystal, Ca2+ ions have coordination number of X while F- ions have coordination number of Y.(A) X=6 and Y=4(B) X=8 and Y=4(C) X=4 and Y=4(D) X=8 and Y=8(E) X=6 and Y=6

25. Among the listed characteristics below, which one does not belong to ionic bonding?(A) Columbic forces(B) Brittle(C) Small difference in electronegativity between bonding pairs(D) Low conductivity in solid state(E) Large bond energy

26. Which of the following statement is correct?(A) Back bonding concerns the electron donation coming from ligands to metal and yielding sigma bond(B) HOMO has higher energy levels than LUMO in molecular orbital theory(C) Compared to Lewis structure, molecular orbital theory describes bonding electrons to be more delocalized(D) The larger radius ratios of cation to anion (Rcation/Ranion), the smaller coordination numbers observed in the crystal packing(E) None of the above

27. Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its Celsius temperature, other factors remaining constant?(A) Line a(B) Line b(C) Line c(D) Line d(E) None of the above

28. What is the point group of PCl5?(A) C4v(B) D5h(C) C5v(D) D3h(E) C3v

29. Which of the following ligand decreases Δo with octahedral coordination?(A) F-(B) CO(C) PR3(D) CN-(E) None of the above

30. On the basis of 18-electron rule, please identify the first -row transition metal of compound (η3-C5H5)(η5-C5H5)M(CO)(A) M=Ni(B) M=Co(C) M=Fe(D) M=Mn monodentate(E) M=Cr

31. What is the correct wavenumber order of ν(CO) in the compounds listed below?(A) [Fe(CO)6]2+ ＞ [Ti(CO)6]2-＞ Cr(CO)6(B) Cr(CO)6 ＞ [Fe(CO)6]2+ ＞ [Ti(CO)6]2-(C) [Fe(CO)6]2+ ＞ Cr(CO)6 ＞ [Ti(CO)6]2-(D) [Ti(CO)6]2- ＞ Cr(CO)6 ＞ [Fe(CO)6]2+(E) None of the above

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