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91年 - 91 淡江大學 轉學考 普通化學#56133

科目：轉學考-普通化學 | 年份：91年 | 選擇題數：5 | 申論題數：34

試卷資訊

所屬科目：轉學考-普通化學

選擇題 (5)

1 Which of the following atomic orbital designations arc not possible? (A) (B) 3p (C) 4d (D) 5p (E) 6s
2 How many valence electrons does a carbon atom have? (A)1 (B)2 (C) 3(D)4 (E) 6
3 Which of the following species has the highest entropy (S°) at 25°C? (A)CO(g)(B)CH4(g) (C) NaCI(s) (D) H2O(I) (E) Fe(s)
4 The energy released by the sun is the result of: (A)naturaf radioactivity (B) nuclear fission (C) nuclear fusion (D) combustion of hydrogen (E) photosynthesis
5 Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of: (A) Pb (B) Ag (C) Sn (D) Cu (E) Mg

申論題 (34)

(A) iron____
(B) Mercury____
(C) Potassium____
(D) Sodium____
(A) BO33-____
(B) O3____
(C) PCI3____
(D) PbCI4____
(A) Cl2____
(B) PCl3 ____
(C) LiCl ____
(D) CIF ____
(A) Soda water____
(B) Natural gas____
(C) Carbon black____
(D) Chalk____
(A) CIO3-____
(B) H5IO6____
(C) BrF3____
(A) an oxidizing agent
(B) a reducing agent.
(A) phosphorus trichloride
(B) lithium hydride
(A) a double bond
(B) a triple bond
(A) HCl(g) in water and in pentane, C5H12(l).
(B) Water in liquid LIF and in gasoline.
(A) All is negative and AS is positive
(B) All is positive and AS is negative Explain your predictions.
16 Docs the concentration of a homogeneous catalyst appear in (lie rate law for a catalyzed reaction? Explain.
17 Explain why oxalic acid can be used to remove rust stains. Write a balanced equation for the reaction involved.
18 The value of equilibrium constant for a reaction increases as the temperature is increased. Is the forward reaction exothermic or endothermic? What can one say about the enthalpy change for the reverse reaction?
19 Both sodium chloride and magnesium oxide are ionic solids, yet magnesium oxide melts at a temperature about 2000 K higher than sodium chloride. Explain why.
20 Explain why the structural isomers dimethyl ether (bp = -23 °C) and ethanol (bp = 78.3 °C) differ significantly in their boiling points? What simple chemical test could be used to distinguish ethanol from dimethyl ether?