112年 - 112 台灣聯合大學系統_碩士班招生考試_化學類:綜合化學#117883

1. What monomer(s) is(are) needed to make the polymer shown here?
  

Ⅰ. HOCH₂CH₂OH
II. HOOCCH₂CH₂COOH
III. HOCH₂CH₂COOH
IV. HOCH = CHOH
V.HOOCCH =CHCOOH (A) II only (B) III only (C) I and II (D) IV and V (E) II and Ⅲ

4. For the process Co(NH₃)₅CI²⁺ + CI^-→ Co(NH₃)₄Cl2⁺ + NH₃, what would be the ratio of cis to trans isomers in the product? (A) 1:1 (B) 1:2 (C) 1:4 (D) 4:1 (E) 2:1

11. The rate law for a reaction is found to be Rate = K[A]²[B]. Which of the following mechanisms gives this rate law?
  (A) I only (B) II only (C) III (D) I and Il (E) II and III

16. A strip of copper is placed in a 1 M solution of copper nitrate, and a strip of silver is placed in a 1 M solution of silver nitrate. The two metal strips are connected to a voltmeter by wires, and a salt bridge connects the solutions. The following standard reduction potentials apply:
 
When the voltmeter is removed and the two electrodes are connected by a wire, which of the following does not take place? (A) Electrons flow in the external circuit from the copper electrode to the silver electrode. (B) The silver electrode increases in mass as the cell operates. (C) There is a net general movement of silver ions through the salt bridge to the copper half-cell. (D) Negative ions pass through the salt bridge from the silver half-cell to the copper half-cell. (E) Some positive copper ions pass through the salt bridge from the copper half-cell to the silver half-cell.

17. The standard potential for the reaction is 0.51 V. What is the equilibrium constant K for this reaction at 250C? (A) 6.3 x 10²⁵ (B) 1.6 x 10^-26 (C) 17 (D) -17 (E) 0.015

18. Which of the following is not a valid resonance structure for N₃^-?(A)(B)(C)(D)(E) All are valid.

21. Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should (A) increase P to 1.5 atm and then increase T'to 300 K. (B) increase T to 300 K, keeping P = 1.0 atm. (C) lower P to 0.5 atm and then increase T to 200 K. (D) increase T to 300 K and then lower P to 0.5 atm. (E) abandon the attempt to sublime X.

31. Which of the following statements is correct for a mercury cell to produce chlorine and sodium hydroxide?
(A) a reduction reaction occurs at anode to generate (1) (B)(1) is H₂ (C) (2) is pure Hg (D) (3) is NaOH solution (E) (4) is water vapor

32. About a chemical reaction, which of the following statements is correct? (A) the entropy change of ice melting is positive (B) the △S of a spontaneous reaction must be negative (C) the △S of a spontaneous reaction must be positive (D) the △G of a spontaneous reaction is larger than 0 (E) the enthalpy change of a spontaneous reaction must be negative