49. 有關理想放大器的特性，下列何者不正確？
(A)輸入阻抗無窮大
(B)輸出阻抗無窮大
(C)電壓增益無窮大
(D)頻帶寬度無窮大

50. 若 F=A⊕B，⊕表 XOR 運算，當 A=1001 1011B，B=0110 0011B 時，F 之結果為何？ (A)F1 H (B)F8 H (C)FB H (D)FE H

1. At a particular temperature, the half-life of a zero-order reaction is 32 min. How long will it take for the reactant concentration to be depleted by a factor of 16? (A)128 min (B)480 min (C)160 min (D)60 min (E)96 min

2. A 100.0-mL sample of the triprotic weak acid H3A (0.200 M) is titrated with 0.200 M NaOH. Besides water and sodium ions, what are the major species after 180.0 mL of 0.200 M NaOH is added in the titration? (A)H2A- (B)HA2- (C)HA2-, A3- (D)H2A-, HA2- (E)A3-

3. Which of the following statements is correct? (A)As long as the disorder of the surroundings is increasing, a process will be spontaneous. (B)For any process, \(\Delta S_{\text{surr}}\) and \(\Delta S_{\text{sys}}\) have opposite signs. (C)If \(\Delta S_{\text{surr}} = -\Delta S_{\text{sys}}\), the process is at equilibrium. (D)\(\Delta H^{\circ}\) is zero for a chemical reaction at constant temperature. (E)none of these

4. Which of the following ions will be expected to have the most negative heat of hydration, \(\Delta H_{\text{hydr}}\)? (A)Cs+ (B)Na+ (C)Ca2+ (D)F- (E)Ba2+

5. Which of the following properties is not a state function? (A)Internal energy (E) (B)Entropy (S) (C)Pressure (P) (D)Gibb's free energy (G) (E)Heat (q)

6. Among these 8 molecules: CH4, XeF4, CHCl3, BF3, CS2, PH3, BrF5, SCl2, how many molecules are polar? (A)4 (B)5 (C)6 (D)3 (E)2

7. Consider the following octahedral complex structures, each involving ethylenediamine and two different monodentate ligands, X and Y. Which one of the following statements about these structures is incorrect? (A)Structures 1 and 2 are optical isomers. (B)Structures 1 and 3 are optical isomers. (C)Structures 1 and 3 are different complexes. (D)Structures 1 and 4 are geometrical isomers. (E)Structures 3 and 4 are the same complex.

8. Which of the following has the smallest radius? (A)Se2- (B)Br- (C)Kr (D)Rb+ (E)Sr2+

9. How many of the following molecules have all of their atoms in the same plane? H2C = CH2 F2O H2CO NH3 CO2 BeCl2 H2O2 (A)3 (B)4 (C)5 (D)6 (E)7

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