【全部】 - 學士後西醫物理及化學2024~2020難度:(61~70)-阿摩線上測驗

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【全部】 - 學士後西醫物理及化學2024~2020難度:(61~70)

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1(A).

66. The color difference between [CoCl₄]²⁻and [Co(H₂O)₆]²⁺can be supported by which concept?
(A) Redox process
(B) Spectrochemical series
(C) Disproportionation reaction
(D) van’t Hoff factor
(E) Hard-Soft Acid-Base

2(A).

68. For a reaction involving changes of reactant concentrations ([A]), what is the reaction order (m) when the correlation of ln [A] versus time (t) is a straight line?
(A) m=0
(B) m=1/2
(C) m=1
(D) m=2
(E) None of these

3(A).

74. Which is the major specie for a carbonate-containing solution at pH 8.5? (K_a1 = 4.3 × 10^–7, K_a2 = 4.8 × 10^–11 for carbonic acid)
(A) CO₂
(B) H₂CO₃
(C) HCO₃⁻
(D) CO₃²⁻
(E) C₂O₄²⁻

4(A).

82. For corrosion of iron, which of the following statements is (are) true?

I. Anode reaction: Fe → Fe²⁺ + 2e^–

II. Cathode reaction: O₂+ 2H₂O + 4e^– → 4OH^–

III. Moisture serving as a salt bridge

(A) I
(B) III
(C) I and II
(D) I, II, and III
(E) None of the statement is true

5(A).

1. Consider the block and spring system shown in the drawing. On the earth’s surface the natural frequency is ω. The system is then transported into moon’s surface (Gravitational acceleration: g_Moon= g_Earth/6). How will the natural frequency of the system change?
(A) 6ω
(B) ω
(C) ω/6
(D) ω/
(E) The frequency doesn’t change.

6(A).

18. Which of the following options best describes the relationship between the following two compounds?

(A) Constitutional isomers
(B) Stereoisomers
(C) Identical
(D) Not isomers, different compounds entirely.
(E) Conformers

7(A).

22. What are the hybridization state and geometry of the nitrogen atom in the following chemical structure?

(A) sp hybridized and linear geometry
(B) sp² hybridized and trigonal pyramidal
(C) sp³ hybridized and trigonal pyramidal
(D) sp³ hybridized and trigonal planar
(E) sp³ hybridized and bent

8(A).

66. The lattice energy of NaI(s) is -686 kJ/mol, and its heat of solution is -7.6 kJ/mol. Calculate the hydration of energy of NaI(s) in kJ/mol.
(A) -678
(B) -694
(C) +678
(D) +694
(E) +15.2