62 Which of the following cvcloalkenes would be expected to be stable? 
(A) 1&2
(B)2&3
(C)2
(D)l&3
(E) none are stable 

58. If 30 mL of 5.0 x 10-4M Ca(NO 3)2 are added to 70 mL of 2.0 ✖ 10-4 M NaF, will a precipitate occur? (Ksp of CaF2 = 4.0 ✖ 10-11 ) (A) No, because the ion product is greater than iTSp. (B) Yes, because the ion product is less than XSp. (C) No, because the ion product is less than ZSp. (D) Not enough information is given. (E) Yes, because the ion product is greater than Ksp.

59. A galvanic cell consists of a left compartment with a tin electrode in contact with 0.1 M Sn(N03)2(aq) and a right compartment with a lead electrode in contact with 1 ✖ 10 -3M Pb(NO3)2(aq). The relevant reduction potentials are:   When this cell is allowed to discharge spontaneously at 25°C, which of the following statements is true? (A) Electrons will flow from left to right through the wire. (B) Pb2+ ions will be reduced to Pb metal.  (C) the concentration of Sn2+ ions in the left compartment will increase. (D) The tin electrode will be the cathode. (E) No noticeable change will occur, because the cell is at equilibrium.

60. Consider the galvanic cell shown below (the contents of each half-cell are written beneath each compartment): The standard reduction potentials are as follows: Which of the following statements about this cell is false? (A) This is a galvanic cell. (B) Electrons flow from the Pt electrode to the Cr electrode. (C) Reduction occurs at the Pt electrode. (D) The cell is not at standard conditions. (E) To complete the circuit, cations migrate into the left half-cell and anions migrate into the right half-cell from the salt bridge. II. Choose one correct answer for the following questions

61. Which of the following compounds is the strongest acid? (A)p-nitrobenzoic acid (B)p-bromobenzoic acid (C) m-methylbenzoic acid (D) m-methoxybenzoic acid (E) water

63. The reaction of CH3CH2MgBr with CH3COCH2CH3 gives. : (A) an achiral product. (B) a of diastereomers. ； (C) the racemate of a chiral product. (D) a single enantiomer. (E) none of the above.

64.The, nrnton?： marked and Hh in the molecule below are___________. (A) chemically equivalent (B) enantiotopic (C) diastereotopic  (D) endotopic (E) none of the above 

65. Consider the spectrum illustrated below.  Which of the following structure will be best for this spectrum?(A)(B)(C)(D)(E) None ofthe above

66. Consider the following two spectrums which are from the same compound BC,(A)(B)(C)(D)(E) None ofthe above

67. wh il1 be the major product ofadamantane (shown below) reacted with Br2 with the presence ofperoxide?(A)(B)(C)(D)(E) None of the above

68. Consider the following reaction.BY   is  (A)(B)(C)(D)(E)