112年 - 112 高雄醫學大學_學生轉系考試試題：普通化學#116374

科目：研究所、轉學考(插大)◆普通化學 | 年份：112年 | 選擇題數：25 | 申論題數：0

試卷資訊

所屬科目：研究所、轉學考(插大)◆普通化學

選擇題 (25)

1. Which species has the largest O-N-O angle? (A)FNO2 (B) NO2 (C) (D)(E)

2. The Ka of the pyridinium ion, , is 5.9 x . What is the pH of 0.120 M solution of pyridine C5H5N?(A) 3.00 (B) 9.15 (C) 7.97 (D) 4.78 (E) 8.82
3. Aluminum crystallizes in a face-centered cubic unit cell with an edge length of 380 pm. What is its density? (Al, M=26.98 g/mol) (A) 1.58 g cm-3 (B) 0.73 g cm-3 (C) 3.27 g cm-3 (D) 3.89 g cm-3 (E) 5.40 g cm-3

4. Which reaction has ＞0? All reactants and products are liquids. (A)(B)(C)(D)(E)
5. A 2.0 L container with 2.00 atm Ar gas is connected by a stopcock to 4.0 L container containing 1.0 atm Kr gas. Which statement accurately describes the system after the stopcock is opened and the system is allowed to reach equilibrium? The temperature is 25 °C throughout the experiment. (A) The total pressure is 2.0 atm. (B) The number of moles of Ar in the 2.0 L container is equal to the number of moles of Kr in the 4.0 L container. (C) The average speed of the Ar atoms is equal to the average speed of the Kr atoms. (D) The partial pressure of Ar is equal to the partial pressure of Kr. (E) The partial pressure of Ar is larger than the partial pressure of Kr.

6. How many unpaired electrons does a ground-state gas-phase ion have? (Atomic number of Fe=26) (A) 1 (B) 2 (C) 5 (D) 3 (E) 6
7. Which charge(s) on an N2 ion would give a bond order of 2.5? (A) -2 (B) -1 (C) 0 (D) +1 (E) +2

8. Which nuclide undergoes beta decay? (A) (B) (C) (D) (E)
9. You are diluting an aqueous glucose solution. First, add 0.99 mL of water twice into a vial, and then add 100.0 uL of glucose solution. If the weight of the final solution is 2.1254 g, what is the correct expression for the solution density (g/mL)? (A) 1.021826 (B) 1.0218 (C) 1.021 (D) 1.02182 (E) 1.02

10. To a solution that is 0.01 M each in fluoride, sulfite, and phosphate ions is added dropwise a 1.00 M solution of CaCl2. In what order will solids precipitate?
(A) First Ca3(PO4)2, then CaF2, last CaSO3 (B) First Ca3(PO4)2, then CaSO3, last CaF2 (C) First CaSO3, then, CaF2, last Ca3(PO4)2 (D) First CaF2, then CaSO3, last Ca3(PO4)2 (E) First CaF2, then Ca3(PO4)2, last CaSO3
11. Acetanilide (C6H5NHCOCH3, M=135.2 g/mole) can be prepared from aniline (C6H5NH2, M=93.1 g/mole) and acetic anhydride ([CH3CO]2O, M=102.1 g/mole) according to the balanced equation below.
 C6H5NH2 + [CH3CO]2O C6H5NHCOCH3 + CH3COOH If 5.0 g acetanilide is isolated from the reaction of 5.0 g aniline with 5.0 g acetic anhydride, what is the percent yield of the reaction? (A) 50.0% (B) 68.9% (C) 69.3% (D) 75.5% (E) 88.2%

12. What is ΔG for the decomposition of CaCO3 at 298 K and a partial pressure of CO2 of 2.00xbar?
 (A) -121 kJ mol-1 (B) 110 kJ mol-1 (C) 121 kJ mol-1 (D) 140 kJ mol-1 (E) 160 kJ mol-1

13. A 0.100 g sample of an alloy of copper and silver is dissolved in nitric acid to give a solution of and ions. This mixture is electrolyzed to redeposit all the metal ions as the elemental metals, requiring a current of 0.150 A for 1800 s. What's the mass percent of copper in the alloy? (Cu, M=63.5 g/mole, Ag, MW:107.9 g/mole) (A) 84.2% (B) 20.0% (C) 58.3% (D) 70.6% (E) 77.2%

14. In the following oxidation-reduction reaction and the oxidizing agent is
(A) (B) (C) (D) Sn (E) NO2
15. Which of the following statements are true? A catalyst can act in chemical reaction to:
I. Lower the activation energy.
II. Change the equilibrium concentration of the products.
III. Decrease the ΔE for the reaction.
IV. Change the order of the reaction.
V. Provide a new path for the reaction.(A) I, II, III (B) II and III (C) I and V (D) III and IV (E) II and V

16. Which C3H6O isomer has the highest boiling point? (A)(B) (C) (D) (E)
17. Which is a possible set of quantum numbers n, l, ml, ms for a valence electron of sulfur (S)? (A) 3, 2, 2, 1/2 (B) 3, 1, -1, 1/2 (C) 2, 1, 0, 1/2 (D) 3, 2, 0, -1/2 (E) 2, 1, 0, 1/2

18. A 17.3 mg sample of an organic compound (a non-electrolyte) was ground up with 420 mg of camphor to form a homogeneous mixture melting at 168 ℃. Which is the possible organic structure? ( of camphor = 37.7 ℃/m, m.p. of camphor = 178.4 ℃)(A)(B)(C) (D)(E)

19. For the following anions, ranking the basicity (from strong to weak). (A) (B) (C) (D) (E)

20. Consider the complex ion with 5 unpaired electrons. Which response includes all the following statements that are true?
I. It is paramagnetic.
II. It is a low spin complex.
III. The metal ion is a d5ion.
IV. It is diamagnetic.
V. It is octahedra.(A) I, II (B) III, IV, V (C) I, III, IV (D) III, IV (E) I, III, V

21. Consider the reaction:

 Into a 1.00 L vessel, 1.00 mol H2(g) and 1.00 mole I2 (g) are placed at a high temperature. When the reaction mixture reach the equilibrium, it is found that 65.0% of the H2 has reacted. What is the equilibrium constant for this reaction at this temperature? (A) 13.8 (B) 26.9 (C) 33.8 (D) 17.9 (E) 11.2
22. What's the molecular geometry of IF3? (A) Trigonal planar (B) Trigonal pyramidal (C) T-shaped (D) Tetrahedral (E) Octahedral

23. The standard enthalpy of formation of hematite, Fe2O3(s), is -825.5 kJ/mol. What is the standard enthalpy of reaction for the reduction of hematite with carbon monoxide to give metallic iron as shown below?
(A) +23.5 kJ/mol (B) -23.5 kJ/mol (C) -432.5 kJ/mol (D) -531.5 kJ/mol (E) -849.0 kJ/mol
24. Which transition in a gas-phase hydrogen atom would absorb the most energy? (A) n=1 to n=3 (B) n=2 to n=5 (C) n=3 to n=1 (D) n=3 to n=4 (E) n=4 to n=2

25. Which complex ion absorbs visible light of the longest wavelength? (A) (B) (C) (D) (E)

申論題 (0)