104年 - 104 台灣聯合大學系統_學士班轉學生考試試題_A7：普通化學#139165

1. Which one of the following functional groups is aldehyde? (R = any alkyl groups) (A)–CHO (B)–COOH (C)–COOR (D)–R(CO)R (E)–NR₃

2. How many σ bonds does a propylene molecule have? (A)5 (B)6 (C)7 (D)8 (E)9

3. The orbital hybridization of the carbon atom in carbon dioxide is (A)sp (B)sp² (C)sp³ (D)dsp³ (E)d²sp³

4. What is the important precaution observed in the storage of metallic sodium? (A)Leave the container uncovered (B)Store the sodium in kerosene (C)Store the sodium in water (D)Use an opaque container (E)Store the sodium in fridge

5. Which of the following compounds has the highest boiling point? (A)o-xylene (B)p-xylene (C)m-xylene (D)toluene (E)benzene

6. Which of the following is NOT classified as a Bronsted-Lowry base? (A)ammonia (B)trimethylamine (C)perchlorate ion (D)hydronium ion (E)none of the above

7. Which of the following electron configurations is inconsistent with Hund's rule of maximum multiplicity? (A)1s²2s²2px¹2py¹2pz¹ (B)1s²2s²2px²2py²2pz² (C)1s²2s²2px²2py¹2pz¹ (D)1s²2s²2px²2py²2pz¹ (E)1s²2s²2px²2py¹2pz⁰

8. Which one of the following compounds has the most acidic proton? (A)(B)(C)(D)(E)

9. Express the number 0.05500 in scientific notation: (A)5.50 × 10⁻² (B)5.5 × 10⁻² (C)55 × 10⁻³ (D)5.500 × 10⁻² (E)0.55 × 10⁻¹

10. Which one of the following species does NOT have resonance structures? (A)acetate ion (B)carbonate ion (C)sulfonate ion (D)enolate ion (E)ethoxide ion

11. What is the oxidation number of the central metal atom in [Fe(CO)₅]? (A)5 (B)3 (C)2 (D)1 (E)0

12. Of the following elements, which one has the lowest electronegativity? (A)Mg (B)Cl (C)Br (D)Ca (E)F

13. What is the central metal of chlorophyll (葉綠素)? (A)Mg (B)Cu (C)Co (D)Ni (E)Co

14. What kind of information will be provided by the UV/VIS absorption spectroscopy? (A)Molecule rotation (B)Nuclear spin (C)Nuclear vibration (D)Electronic transition (E)Electron spin

15. Esters undergo hydrolysis reactions with aqueous sodium hydroxide to give alcohols and acids. This well-known process is also called: (A)Hydrogenation (B)Oxidation (C)Saponification (D)Halogenation (E)Epoxidation

16. Which of the following is incorrectly named? (A)SO₄²⁻, sulfate ion (B)Cr₂O₇²⁻, dichromate ion (C)PO₄³⁻, phosphate ion (D)ClO⁻, chlorite ion (E)CN⁻, cyanide ion

17. A fuel-air mixture is placed in a cylinder fitted with a piston. The original volume is 0.320-L. When the mixture is ignited, gases are produced and 805 J of energy is released. To what volume will the gases expand against a constant pressure of 635 mmHg, if all the energy released is converted to work to push the piston? (A)9.19 L (B)6.96 L (C)9.83 L (D)9.51 L (E)1.59 L

18. Which statement is true of a process in which one mole of a gas is expanded from state A to state B? (A)When the gas expands from state A to state B, the surroundings are doing work on the system. (B)The amount of work done in the process must be the same, regardless of the path. (C)It is not possible to have more than one path for a change of state. (D)The final volume of the gas will depend on the path taken. (E)The amount of heat released in the process will depend on the path taken.

19. A sample of N₂ gas is contaminated with a gas A of unknown molar mass. The partial pressure of each gas is known to be 200. torr at 25°C. The gases are allowed to effuse through a pinhole, and it is found that gas A escapes at 2 times the rate of N₂. The molar mass of gas A is: (A)7.00 g/mol (B)56 g/mol (C)14.01 g/mol (D)112 g/mol (E)none of these

20. Which of the following effects will make PV/nRT less than one for a real gas? (A)The gas molecules are large enough to occupy a substantial amount of space. (B)A large number of molecules have speeds greater than the average speed. (C)The gas molecules have a very low molar mass. (D)The gas molecules attract one another. (E)None of these.

21. A solution contains the ions Ag⁺, Pb²⁺, and Ni²⁺. Dilute solutions of NaCl, Na₂SO₄, and Na₂S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order? (A)Na₂SO₄, NaCl, Na₂S (B)Na₂SO₄, Na₂S, NaCl (C)Na₂S, NaCl, Na₂SO₄ (D)NaCl, Na₂S, Na₂SO₄ (E)NaCl, Na₂SO₄, Na₂S

22. Consider the reaction 3A + B + C → D + E where the rate law is defined as

 An experiment is carried out where [B]₀ = [C]₀ = 1.00 M and [A]0 = 1.00 × 10⁻⁴ M, and [A] = 3.26 × 10⁻⁵ M after 3.00 minutes. What is the half-life for this experiment? (A)111 s (B)87 s (C)60 s (D)17 s (E)none of these

23. At 500.0 K, one mole of gaseous ONCl is placed in a one-liter container. At equilibrium it is 5.5% dissociated according to the equation shown here: 2ONCl ⇌ 2NO + Cl2. Determine the equilibrium constant. (A)9.3 × 10⁻⁵ (B)1.7 × 10⁻³ (C)5.8 × 10⁻² (D)9.5 × 10⁻¹ (E)1.1 × 10⁴

24. Ammonia is prepared industrially by the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g) for the reaction: ΔH° = −92.2 kJ and K (at 25°C) = 4.0 × 10⁸. When the temperature of the reaction is increased to 500°C, which of the following is true? (A)K for the reaction will be larger at 500°C than at 25°C. (B)At equilibrium, more NH₃ is present at 500°C than at 25°C. (C)Product formation (at equilibrium) is not favored as the temperature is raised. (D)The reaction of N₂ with H₂ to form ammonia is endothermic. (E)None of the above is true.

25. The equilibrium constant of a certain reaction was measured at various temperatures to give the plot shown below. What is ΔS° for the reaction in J/mol·K?

(A)0.20 (B)3.0 (C)25 (D)−50 (E)−8.3 × 10³