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90年 - 90 學士後西醫：化學#85625

科目：學士後西醫-化學 | 年份：90年 | 選擇題數：20 | 申論題數：18

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所屬科目：學士後西醫-化學

選擇題 (20)

1.Order the following in increasing rate of effusion: (A)Cl2 ＜ F2 ＜ NO2 ＜ CH4 ＜ NO (B)Cl2 ＜ NO2 ＜ F2 ＜ NO ＜ CH4 (C)CH4 ＜ NO2 ＜ NO ＜ F2 ＜ Cl2 (D)CH4 ＜ NO ＜ F2 ＜NO2 ＜ Cl2 (E)F2 ＜ NO ＜ Cl2 ＜ NO2 ＜ CH4
2.Which of the following statements is (are)incorrect? 
I.The hybridization of boron in BF3 is SP2. 
II.The molecule XeF4 is nonpolar. 
III.The bond order of N2 is three. 
IV.The molecule HCN has two pi bonds and two sigma bonds. 
(A)All four statements are correct . (B)III is incorrect. (C)Iand III are incorrect. (D)II and III are incorrect. (E)II, III and IV are incorrect.
3.The hybridization of the central atom in KrF4O is: (A)SP (B)SP2 (C)SP3 (D)dSP3 (E)d2SP3

4.Which of the following statements is false? (A)C2 is paramagnetic. (B)C2 is diamagnetic. (C)The carbon-carbon bond in 5ec0bf4ab2b30.jpg is stronger than the one in CH3CH3. (D)The carbon-carbon bond in 5ec0bf571aae3.jpg is shorter than the one in CH3CH3. (E)none of these.

5.Which if the following species has the largest dissociation energy? (A) O2(B) (C)(D)(E)
6.The unit cell in a certain lattice consists of a cube formed by an anion at each corner, an anion in the center, and a cation at the center of each face. The unit cell contains a net: (A)5 anions and 6 cations (B)5 anions and 3 cations (C)2 anions and 3 cation (D)3 anions and 4 cations (E)2 anions and 2 cations
7.A liquid-liquid solution is called an ideal solution if (I)it obeys PV = nRT. (II)it obeys Raoult’s law. (III)solute-solute, solvent-solvent, and solute-solvent interactions are very similar. (IV)solute-solute, solvent, and solute-solvent interactions are quite different. (A)I, II, III (B)I, II, IV (C)II, III (D)II, IV (E)I, II, III
8. For which order reaction is the half life of the reaction proportional to 1/k (k is the rate constant)? (A)zero order (B)first order (C)second order (D)all of the above (E)none of the above.
9.Which of the following would produce a basic aqueous solution? (A) P4O10 (B)KCl (C)CO2 (D)NH4Cl (E)none of these
10. For a particular chemical reaction, △H = 5.0kJ and △S = - 25J/K. Under what temperature conditions is the reaction spontaneous? (A)When T ＜ -220K (B)When T ＜ 220K (C)When T ＞ 220K (D)The reaction is not spontaneous at any temperature. (E)The reaction is spontaneous as all temperature.

11. Which of the following is true for the cell shown here? (A)The electrons flow from the cathode to the anode. (B)The electrons flow from the zinc to the chromium. (C)The electrons flow from the chromium to the zinc. (D)The chromium is oxidized. (E)The zinc is reduced.
【已刪除】複選題
12. Determine △G for a cell that utilizes the following reaction: 
The standard reduction for the chlorine gas is 1.360 volts and the standard reduction for the bromine liquid is 1.077 volts. (A)82.5kJ (B)54.6kJ (C)27.3kJ (D)236kJ (E)471kJ
13. Give the number of geometrical isomers for the octahedral compound [MA2B2C2] where A, B and C represent ligands. (A)1 (B)2 (C)3 (D)4 (E)5 .
14. Which of the following is paramagnetic? (A)[Zn(H2O)6]2+ (B)[Co(NH3)6]3+ (strong field) (C)[Cu(CN)3]2- (D)[Mn(CN)6]2- (strong field) (E)non of these
15. The rate constant for the beta decay of thorium-234 is 2.88×10-2 /day. What is the half-life of this nuclide? (A)53.1days (B)1.22days (C)24.1days (D)101days (E)0.693days

16. Which of the following would not be expected to undergo disproportionation?  (A)Cl2(B)(C)(D)(E)
17. Which of the following oxides is amphoteric? (A) Al2O3 (B)B2O3 (C)In2O3 (D)Tl2O3 (E)Tl2O
18. The ionization constants for the diprotic acid H2S are 1.0×10-7 and 1.3×10-13. For 0.1molar solutions of sodium sulfide and sodium hydrogen sulfide, which of the following is true? (A) The solutions are neutral. (B)The sodium sulfide solution is the most basic. (C)Both the solutions are acidic. (D)The sodium hydrogen sulfide solutions is the most basic. (E)Both solutions have the same pH.
19. For the reaction system N2O4(g)≒2NO2(g) at 90°C, Kc = 0.27. For this system, what is Kp? (A) ＞ 0.27 (B)＜ 0.27 (C) = 0.27 (D)We can not determine Kp without additional data. (E)none of these
20. A second order reaction starts with an initial concentration of 0.020M of the reactant. If the rate constant is 10/(M. .), calculate the time required to decrease the initial concentration to 0.005M. (A)0.069s (B)10s (C)15s (D)0.139s (E)20s.

申論題 (18)

(a)C5H10O25ec0c2f4242f4.jpg

(b)C10H12O 5ec0c307b2580.jpg

(a)5ec0c35506221.jpg

(b) 5ec0c37ca835e.jpg

(c) 5ec0c38f90dd9.jpg

(d) 5ec0c39c749c7.jpg

(e)5ec0c3a92b1d5.jpg

(f) 5ec0c3b484348.jpg
(a)Wolff-Kishner reduction
(b)Michael reaction
(c)Dieckmann condensation
(d)Gabriel amine synthesis
(e)Hofmann elimination
(f)Saytzeff elimination
(g)Wittig reaction
(h)Williamson ether synthesis
(i)Gatterman-Koch synthesis
(j)Hell-Volhard-Zelinsky reaction