24. What is the point group of sulfuric acid (with the highest possible symmetry)?
(A)T_d
(B)C₄
(C) D_2d
(D)C_2v
(E) Cs

75. What is the point group of triphenylphosphine? (A) (B) D3 (C) (D) C3 (E)

79. Determine the point group of the molecules shown below?  (A) C3v (B) C3 (C) D3d (D) D3h (E) None of the above.

81. On the basis of VSEPR, what is the predicted point group for XeO2F2? (A)Ci (B) Cs (C)C2v (D) C4v (E) D3h

26. What is the point group of BICIF (chlorofluoroiodoborane)? (A)(B) (C) (D)(E)

25. Rank the following compounds from the most soluble to the least soluble in water.(A)1＞2＞3＞4(B)2＞4＞1＞3(C)2＞1＞4＞3(D)3＞4＞1＞2(E)4＞2＞1＞3

26. There are three types of cubic unit cells, including simple cubic (SC), face-centered cubic (FCC), and body-centered cubic (BCC). Which of the following statements is correct? (A) BCC has 4 atoms per unit cell. (B) FCC has the largest unit cell. (C) The coordination number of SC is 8. (D) FCC is alternatively called hexagonal close-packed structure. (E) In BCC, the atomic packing factor is 0.68.

27. How many aromatic hydrocarbons have the molecular formula of C8H10? (A)2 (B)3 (C)4 (D)5 (E)6

28. Which of the following statements about mass spectrometry is correct? Ⅰ.The ions are separated based on their charge-to-mass ratio. Ⅱ.Chemical ionization produces more fragmentation than electron ionization. Ⅲ. Mass spectrometry can be used to accurately measure small differences in isotopic abundance. (A) I and II only (B) I and III only (C) II and IiI only (D) III only (E) I only

29.Which of the following statements associated with collision theory is incorrect? (A) More collisions correspond to a faster reaction rate. (B) It is assumed that the reactant molecules are hard spheres. (C) The potential energy and orientation govern the occurrence of collisions between reacting particles. (D) Collisions can oceur between atoms, ions, and molecules. (E) The Arrhenius equation gives the correlation between the rate constant k and temperature T.

30. The jonization energy of H is 13.6 eV. The first and second ionization energies of He will be approximately (A) 5 eV and 14 eV (B) 5 eV and 54 eV (C) 14 eV and 24 eV (D) 14 eV and 34 eV (E) 24 eV and 54 eV

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