國立彰化師範大學九十三學年度碩士班招生考試試題
系所：科學教育研究所
科目：普通化學 組別：丙組
☆☆請在答案紙上作答☆☆
第 1 頁，共 4 頁
A. 單選題 (選出一個最適當答案) (24 題, 每題 2.5 分)
1. What is the proper way to dispose of a two milliliter sample of hexane after completing experiments with it?
(A) Return it to the solvent bottle.
(B) Place it in a waste bottle with compatible organic materials.
(C) Flush it down the drain with large quantities of water.
(D) Pour it on a solid absorbent so it can be thrown away with solid waste.
2. Which compound can undergo both oxidation and reduction? (A) Cr2O72- (B) NO3- (C) OCl- (D) S2.
3. According to the solubility curve shown, how many grams of solute can be recrystallized when 20 mL
of a saturated solution at 60 °C are cooled to 0 °C? (A) 7.0 (B) 12 (C) 25 (D) 35
4. Which of following does not involve any delocalized π bonds (A) acetate ion (B) carbonate ion
(C) ozone (D) nitrous acid.
5. The combustion of 0.200 mol of liquid carbon disulfide, CS2, to give CO2(g) and SO2(g) releases
215 kJ of heat. What is ΔHf° for CS2(l) in kJ/mol? (A) 385 (B) 87.9 (C) -385 (D) -475
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國立彰化師範大學九十三學年度碩士班招生考試試題
系所：科學教育研究所
科目：普通化學 組別：丙組
☆☆請在答案紙上作答☆☆
第 2 頁，共 4 頁
6. For the reaction: 2NO2(g) →N2O4(g) ΔH < 0. What predictions can be made about the sign of ΔS
and the temperature conditions under which the reaction would be spontaneous?


(A)
(B)
(C)

ΔSrxn
negative
negative
positive
(D) positive
Temperature Condition
low temperatures
high temperatures
high temperatures
low temperatures
7. Which statement about second order reactions is correct?
(A) Second order reactions require different reactants.
(B) Second order reactions are faster than first order reactions.
(C) Second order reactions are unaffected by changes in temperature.
(D) The half-life of a second order reaction depends on the initial reactant concentration.
8. Arranging the following in order of decreasing oxidizing power:
HClO2, ClO3-, HClO, ClO4(A) ClO3- > HClO2 = HClO > ClO4(C) ClO4- = ClO3- > HClO2 > HClO
(B) HClO = HClO2 > ClO3- > ClO4(D) ClO3- = HClO > ClO4- > HClO2
9. A solution of Pb(NO3)2 is added dropwise to a second solution in which [Cl-] = [F-] = [I-] =
[SO42-] = 0.001 M. What is the first precipitate that forms?
(A) PbCl2 (Ksp = 1.5 x10-5) (B) PbF2 (Ksp = 3.7 x10-8)
(D) PbSO4 (Ksp = 1.8 x10-8)
(C) PbI2 (Ksp = 8.5 x10-9)
10.Which set of quantum numbers (n, l, ml, ms) is possible for an electron in an atom?
(A) 1, 0, 0, -1/2 (B) 1, 1, 0, +1/2 (C) 2, 1, 2, +1/2 (D) 3, 2, -2, 0
11.Which compound has the highest melting point?
(A) MgO (B) KCl (C) NaCl (D) CaO
12. Which is most likely to react by an SN1 mechanism?
(A) CH3Cl (B) CH3CHClCH3 (C) (CH3)3CCl (D) C6H5Cl.
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國立彰化師範大學九十三學年度碩士班招生考試試題
系所：科學教育研究所
科目：普通化學 組別：丙組
☆☆請在答案紙上作答☆☆
第 3 頁，共 4 頁
13. The Michaelis constant, Km, is
(A) The maximum velocity that any given enzyme reaction can achieve
(B) The substrate concentration which gives the best enzyme assay for an enzyme reaction
(C) The substrate concentration when the reaction is half the way toward the maximum velocity
(D) The maximum velocity divided by half
14. As indicated by Lewis structure, which of the following molecule would probably not exist as a
stable molecule (A) NH3 (B) N2H6 (C) SF4 (D) CH2F2
15. For the following titration, determine whether the solution at the equivalence point is acidic, basic
or neutral and why: NaHCO3(aq) titrated with NaOH(aq)
(A) basic because of excess OH(B) acidic because of hydrolysis of HCO3(C) acidic because of hydrolysis of Na+
(D) basic because of hydrolysis of CO3216. Choose the correct statement based on the following oxidation potentials:
Mg/Mg2+ +2.37 V; Fe/Fe2+ +0.44 V; Cu/Cu2+ -0.34 V;
Zn/Zn2+ +0.76 V; Sn/Sn2+ +0.14 V; Ag/Ag+ -0.80 V
(A) Mg will not displace Zn2+ from solution
(B) Cu will displace Sn2+ from solution
(C) Fe will displace Zn2+ from solution
(D) Fe will displace H+ from solution
17. Molecules which are nonsuperimposable mirror images of each other are called:
(A) achiralomers (B) enantiomers (C) diastereomers (D) cis/trans isomers
18. What is (are) the main product(s) of the following chlorination reaction?
CN
Cl2
O
FeCl3
H
(A) 3-chloro-5-cyanobenzaldehyde
(C) 2-chloro-3-cyanobenzaldehyde
(B) 2,6-dichloro-3-cyanobenzaldehyde
(D) 2-chloro-3-cyanobenzaldehyde and 2-chloro-5-cyanobenzaldehyde
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國立彰化師範大學九十三學年度碩士班招生考試試題
系所：科學教育研究所
科目：普通化學 組別：丙組
☆☆請在答案紙上作答☆☆
第 4 頁，共 4 頁
19. Which of the pairs of molecule below have the same hybridization on the central atom in each molecule ?
(A) HOCl, ClF2 (B) H2O, HNO (C) HCN, CO2 (D) BeH2, NH3
20. Which of the following has the smallest value of the first ionization energy ?
(A) Ar (B) Cs (C) N (D) Cu
21. Which of the following isoelectronic species has the largest radius?
(A) O2- (B) Na+ (C) F- (D) Ne
22. The very strong attraction of iron in a magnet is best explained by:
(A) diamagnetism (B) electron affinity (C) ferromagnetism (D) paramagnetism
23. Using VSEPR theory, which of the following descriptions of probable molecular geometry is incorrect
(A) SF6/octahedral (B) SiCl4/tetrahedral (C) BF3/trigonal planar (D) SnCl4/square planar
24. A 200. mL sample of a gaseous hydrocarbon has a density of 2.53 g/L at 55 °C and 720 mmHg.
What is its formula? (A) C2H6 (B) C4H10 (C) C5H12 (D) C6H6
B. 非選擇題 (共四題)
1. Using an MO diagram, rationalize the trends in the data given in Table. Will [N2]- and [N2]+ ions be
diagamnetic or paramagnetic? (10 points)
Diatomic species
Bond distance/pm
Bond dissociation enthalpy/kJmol-1
N2
110
945
[N2]119
765
+
[N2]
112
841
2. Sketch all of the possible geometrical isomers for the following complexes and indicated which of
these would exhibit optical acitivity. (8 points)
(A). [Co(en)(NH3)2BrCl]+
(B). [Co(NH2CH2CO2)2NH3Cl]+
3. Write a mechanism for the decarboxylation of ethylmalonic acid (6 points)
O H O
HO C C C OH
CH2CH3
O
HO C CH2CH2CH3
4. Explain the following terms.
(A) ligand field theory (4 points)
(B) dispersion (London) force (4 points)
(C) Heisenberg uncertainty principle (4 points)
(D) lattice energy (4 points)
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