28. Colligative properties depend on
(A) the chemical properties of the solute.
(B) the chemical properties of the solvent.
(C) the masses of the individual ions.
(D) the molar mass of the solute.
(E) the number of particles dissolved.

29. A 0.100 m K2SO4 solution has a freezing point of -0.43°C. What is the van't Hoff factor for this solution? Kf = 1.86°C/m (A) 0.77 (B) 1.0 (C) 2.3 (D) 3.0 (E) >3.0

30. The reaction 2A + 5B → products is second order in A and fourth order in B. What is the rate law for this reaction? (A) rate = k[A]2[B]5 (B) rate = k[A]4[B]2 (C) rate = k[A]2[B]4 (D) rate = k[A]5[B]2 (E) rate = k[A]2/7[B]5/7

31. The Ksp of AgI is 1.5 × 10–16. Calculate the solubility in mol/L of AgI in a 0.45 M NaI solution. (A)6.8×10–17 (B) 0.45 (C) 1.5×10–16 (D) 1.2×10–8 (E) 3.3×10–16

32. What is the formula for the pentaamminehydroxotitanium(II) ion? (A)[Ti(NH3)(OH)5]3– (B) [Ti(NH3)5(OH)5]2+ (C) [Ti(NH3)5(OH)]2+ (D)[Ti(NH3)5(OH)5]3– (E) [Ti(NH3)5(OH)]+ 

33. Which of the following complexes can exhibit optical isomerism? (en = H2N–CH2–CH2–NH2 and is bidentate) (A)cis–Co(NH3)4Cl2 (B) trans–Co(en)2Br2 (C) cis–Co(en)2Cl2 (D) Co(NH3)3Cl3 (E) none of these

34. Which of the following complexes shows geometrical isomerism? (A) [Co(NH3)5Cl]SO4 (B) [Co(NH3)6]Cl3 (C) [Co(NH3)5Cl]Cl2 (D) K[Co(NH3)2Cl4] (E) none of these

35. The complex ions of Zn2+ are all colorless. The most likely explanation for this is: (A) Zn2+ is paramagnetic. (B) Zn2+ exhibits “d orbital” splittings in its complexes such that they absorb all wavelengths in the visible region. (C) Since Zn2+ is a d10 ion, it does not absorb visible light even though the “d orbital” splittings are correct for absorbing visible wavelengths. (D) Zn2+ is not a transition metal ion. (E) None of these is correct.

36. The complex FeL62+, where L is a neutral ligand, is known to be diamagnetic. The number of d electrons in this complex ion is: (A)4 (B) 5 (C) 6 (D) 7 (E) 8

37. What is the correct IUPAC name for [MnCl4(H2O)2]– ? (A) diaquatetrachloromanganate(0) ion (B) diaquatetrachloromanganate(III) ion (C) diaquatetrachloromanganate(I) ion (D) diaquatetrachloromanganese(III) ion (E) diaquatetrachloromanganese(I) ion

38. What is the maximum oxidation state expected for titanium? (A)+8 (B) +5 (C) +3 (D) +2 (E) +4

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