阿摩線上測驗 登入

108年 - 108 臺灣綜合大學系統_學士班轉學生聯合招生試題：普通化學B#122175

科目：轉學考-普通化學 | 年份：108年 | 選擇題數：25 | 申論題數：18

試卷資訊

所屬科目：轉學考-普通化學

選擇題 (25)

1. Which of the experiments listed below did not provide the information stated about the nature of the atom? (A) The Rutherford experiment proved that the Thomson "plum pudding" model of the atom was essentially correct. (B) The Rutherford experiment determined the charge on the nucleus. (C) The cathode-ray tube proved that electrons have a negative charge. (D) Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the charge on the electron.
2. Compound X2Y is 60% X by mass. Calculate the percent Y by mass of the compound X2Y2. (A) 30% (B) 80% (C) 40% (D) 20% (E) 60%
3. The following unbalanced reaction occurs in basic media:
Fe2+ + Cr2O72- → Fe3+ + Cr3+
The coefficient for water in the balanced equation is _______ and water appears on the _______ side of the equation. (A) 14, left (B) 14, right (C) 7, right (D) 7, left (E) none of these
4. How is the observed pressure of a gas related to the ideal pressure? (A) The relationship depends on the gas. (B) They are equal. (C) The observed pressure is greater than the ideal pressure. (D) The observed pressure is less than the ideal pressure. (E) none of these
5. For the reaction 2H2(g) + O2(g) ⇌ 2H2O(g), what is the relationship between K and Kp at temperature T? (A) Kp = K(RT)2 (B) K = Kp(RT) (C) K = Kp (D) Kp = K(RT) (E) K = Kp(RT)2
6. The acids HC2H3O2 and HF are both weak, but HF is a stronger acid than HC2H3O2. HCl is a strong acid. Order the following according to base strength. (A) Cl- ＞ F- ＞ C2H3O2- ＞ H2O (B) C2H3O2- ＞ F- ＞ H2O ＞ Cl- (C) C2H3O2- ＞ F- ＞ Cl- ＞ H2O (D) F- ＞ C2H3O2- ＞ H2O ＞ Cl- (E) none of these
7. Consider a solution consisting of the following two buffer systems:
H2CO3 ⇌ HCO3- + H+  pKa = 6.4
H2PO4- ⇌ HPO42- + H+  pKa = 7.2
At pH 6.4, which one of the following is true of the relative amounts of acid and conjugate base present? (A) [H2CO3] ＞ [HCO3-] and [H2PO4-] ＞ [HPO42-] (B) [HCO3-] ＞ [H2CO3] and [HPO42-] ＞ [H2PO4-] (C) [H2CO3] ＞ [HCO3-] and [HPO42-] ＞ [H2PO4] (D) [H2CO3] = [HCO3-] and [HPO42-] ＞ [H2PO4] (E) [H2CO3] = [HCO3-] and [H2PO4-] ＞ [HPO42-]
8. Which statement is true of a process in which 1 mol of a gas is expanded from state A to state B? (A) The final volume of the gas will depend on the path taken. (B) The amount of work done in the process must be the same, regardless of the path. (C) When the gas expands from state A to state B, the surroundings are doing work on the system. (D) The amount of heat released in the process will depend on the path taken. (E) It is not possible to have more than one path for a change of state.
9. Consider the dissociation reaction of the acidHF.
HF(aq) ⇌ H+(aq) + F-(aq)
Why is ΔS negative? (A) The reaction is expected to be exothermic, and ΔS thus should be negative. (B) The reaction is expected to be endothermic, and thus ΔS should be negative. (C) Each HF molecule produces two ions when it dissociates. (D) The ions are hydrated. (E) none of these
10. In which of the following cases can Eº be equal to zero?
I. In any cell at equilibrium II. In a concentration cell
III. Eº can never be equal to zero. (A) I only (B) III (C) I and II (D) II only (E) none of these
11. For a reaction in a voltaic cell, both ΔHº and ΔSº are positive. Which of the following statements is true? (A) Eºcell will increase with an increase in temperature. (B) Eºcell will decrease with an increase in temperature. (C) Eºcell will not change when the temperature increases. (D) ΔGº> 0 for all temperatures. (E) None of the above statements is true.
12. Which of the following is not determined by the principal quantum number, n, of the electron in a hydrogen atom? (A) the minimum wavelength of the light needed to remove the electron from the atom (B) the energy of the electron (C) the shape of the corresponding atomic orbital(s) (D) the size of the corresponding atomic orbital(s) (E) All of the above are determined by n.
13. Which of the following ionic compounds has the largest lattice energy； that is, which has the lattice energy most favorable to a stable lattice? (A) LiF (B) LiI (C) CsF (D) MgO (E) CsI
複選題
14. Which of the following has a central atom that is dsp3 hybridized? (A) SO2 (B) SBr6 (C) CF4 (D) SCl4 (E) SF4-
15. The spectrochemical series is
I- ＜ Br- ＜ Cl- ＜ F- ＜ OH- ＜ H2O ＜ NH3 ＜ en ＜ NO2- ＜ CN- Which of the following complexes will absorb visible radiation of the highest energy (shortest wavelength)? (A) [Co(OH)6]3- (B) [Co(NH3)6]3+ (C) [Co(I)6]3- (D) [Co(H2O)6]3 (E) [Co(en)3]3+

16. The reaction of (CH3)3CBr with hydroxide ion proceeds with the formation of (CH3)3COH. (CH3)3CBr(aq) + OH-(aq) → (CH3)3COH(aq) + Br-(aq)
The following data were obtained at 55 ℃.

What will the initial rate (in mol/L • s) be in Experiment 4? (A) 1.8 × 10-3 (B) 6.0 × 10-3 (C) 9.0 × 10-3 (D) 3.0 × 10-3 (E) none of these

17. Consider the reaction
3A + B + C → D + E
where the rate law is defined as
-= k[A]2[B][C]
An experiment is carried out where [B]0 = [C]0 = 1.00 M and [A]0 = 2.46 × 10-4
M. After 2.96 min, [A] = 3.20 × 10-5 M. What is the value of k? (A) 8.30 × 107 L3/mol3 • s (B) 4.02 × 10-7 L3/mol3 • s (C) 2.14 × 10-5 L3/mol3 • s (D) 1.53 × 102 L3/mol3 • s (E) 9.18 × 103 L3/mol3 • s
18. A p-type semiconductor (A) is made by doping host atoms with atoms having more valence electrons than the host. (B) has electrons that lie close in energy to the conduction bands. (C) is made by doping host atoms with atoms having fewer valence electrons than the host. (D) two of these (E) none of these
19. Liquid A has vapor pressure x. Liquid B has vapor pressure y, and x> y. What is the mole fraction of A in the liquid mixture if the vapor above the solution is 50% A? (A) y/(2x + 2y) (B) y/(x + y) (C) x/(2x + 2y) (D) x/(x + y) (E) none of these
20. Which of the following complexes shows geometric isomerism? (A) K[Co(H2O)2Cl4] (B) [Co(H2O)5Cl]Cl2 (C) [Co(H2O)5Cl]SO4 (D) Na3[CoCl6] (E) [Co(H2O)6]Cl3
21. Choose the species with the smallest hydration energy (absolute value). (A) F- (B) Cl- (C) Br- (D) I- (E) All are the same.

22. The nuclide Th is radioactive. When one of these atoms decays, a series of α- and β-particle emissions occurs, taking the atom through many transformations to end up as an atom of Pb. How many α particles are emitted in converting Th into Pb? (A) 8 (B) 10 (C) 4 (D) 6 (E) 2

23. Which reaction will produce an isotope of the parent nuclide? (A)Ac → β + ? (B) As + e→ ? (C)N → β+  ? (D) Br → n + ? (E) Po → He + ?
24. Which of the following molecules is optically active? (A) CH3OH (B) CH2Cl2 (C) CH3CH2CClFOH (D) CH3CH2OCH3 (E) (CH3)2CHOH
25. When C4H8 is treated with water and H2SO4, a tertiary alcohol is produced. Which of the following structures could represent C4H8 in this reaction? (A) CH3CH2CH=CH2 (B) CH3CH=CHCH3 (C) CH3CH2CH2CH3 (D) (CH3)2C=CH2 (E) none of these

申論題 (18)

1.Please show how to prepare a buffered solution with pH of 4.37 by using benzoic acid (HC7H5O2; Ka = 6.4 × 10-5) (6%)
a. If a mixture of NaHCO3 and Na2CO3 was titrated, what would be the relative sizes of V1 and V2?
b. If a mixture of NaOH and Na2CO3 was titrated, what would be the relative sizes of V1 and V2?

3.Consider the following diagram of free energy (G) versus fraction of A reacted in terms of moles for the reaction 2A(g) → B(g).
66bea829961a1.jpg
Before any A has reacted, PA = 3.0 atm and PB = 0. Determine the sign of ΔGº and the value of K for this reaction. (6%)
a. POCl3
b.XeO4
c.NO43-
a. What is the driving force for a concentration cell to produce a voltage?
b. Is the higher or the lower ion concentration solution present at the anode? Why?
c.When the anode ion concentration is decreased and/or the cathode ion concentration is increased, both give rise to larger cell potential. Why?
a. A concentrated solution in water will always contain a strong or weak electrolyte.
b. A strong electrolyte will break up into ions when dissolved in water.
c. An acid is a strong electrolyte.
d.A real gas behaves most ideally when the container volume is relatively large and the gas molecules are moving relatively quickly.
e. A catalyst does not change the value of the rate constant.
a. What is the order of the reaction with respect to A, and what is the initial concentration of A?
b.What is the concentration of A after 9 seconds?
c. What are the first three half-lives for this experiment?