109年 - 109 台灣聯合大學系統_學士班轉學生考試試題_A6：普通化學#99771

科目：研究所、轉學考(插大)◆普通化學 | 年份：109年 | 選擇題數：50 | 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 (50)

1. Which one of the following is the strongest intermolecular force experienced by noble gases? (A)polar covalent bonds (B) hydrogen bonding (C) London dispersion forces (D) ionic bonding (E) dipole-dipole interactions
2. The sodium salt, NaA, of a weak acid is dissolved in water； no other substance is added. Which of these statements (to a close approximation) is true? (A) [H+] = [A-] (B) [A-] = [OH-] (C) [HA] = [OH-] (D) [H+] = [OH-] (E) none of these

3. Calculate the pH of 0.10 M NH4CN.(60ee3100eb976.jpg) (A) 5.79 (B)8.21 (C) 8.87 (D) 5.13(E) 9.23
4. Compounds X and Y have the same mass, but compound Y has two more atoms in its structure. Which statements must be true? (A) Cv for compound X is greater than Cv for Y (B) Cv for compound X is less than C, for Y (C) Cpfor compound X is greater than Cp for Y (D) Cp, for compound X is less than Cp for Y (E) B and D
5. Which of the following gases is/are present in the fuel obtained after coal gasification? I: octene gas； II: synthetic gas； IIl: methane gas； IV: mercaptan gas； V propane gas (A) I and IV (B) I and V (C) I, II and IIl (D) II, IV, and V (E) II and Ill

6. When the equation for the following reaction in basic solution is balanced, what is the sum of the coefficients?60ee31c29cec6.jpg(A) 20(B) 10 (C)8 (D)13(E)11

7. A solution contains the ions Ag+, 60ee33767f393.jpg.Dilute solutions of NaCI, Na2SO4, and Na2S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order? (A) Na2S, NaCI, Na2SO4 (B) Na2SO4, NaCI,Na2S (C) Na2SO4, Na2S, NaCI (D) NaCI, Na2S, Na2SO4(E) NaCI, Na2SOa,Na2S

8. When NH3(aq) is added to60ee3431c6305.jpg(aq), a precipitate initially forms. What is its formula? (A) CuO (B) Cu(NH3) (C) Cu(OH)2 (D) Cu(NO3)2 (E)60ee34e60ccce.jpg
9. Order the following according to increasing rate of effusion: (A) CH4 ＜NO2＜NO＜F2＜CI2(B) CI2＜F2＜NO2＜CH4＜NO(C)CI2＜NO2＜F2 ＜NO＜CH4(D) CH4 ＜NO＜F2＜NO2＜Cl2(E) F2 ＜NO ＜CI2 ＜NO2＜CH4
10. As water is heated, its pH decreases. This means that (A) [OH-] ＞[H+] (B) [H+]＞ [OH-] (C) the water is no longer neutral (D) two of these are correct. (E) none of these is correct.

11. A 100.0-mL sample of 0.2 M (CH3)3N 60ee35eccaf14.jpg is titrated with 0.2 M HCI. What is the pH at the equivalence point? (A) 5.4 (B)7.0 (C) 10.3 (D) 3.1 (E) 9.9

12. You have a solution of 0.10 M CI- and 0.10 M 60ee3635539e8.jpg. You add 0.10 M silver nitrate dropwise into the solution. 60ee367b9565f.jpg. Which of the following will precipitate first? (A) silver nitrate (B) silver chromate (C) cannot be determined from the information given (D) silver chloride (E) none of these

13. A 0.012-mol sample of Na:SO, is added to 400 mL of each of two solutions. One solution contains 1.5 x 103 M BaCh； the other contains60ee36c422e5b.jpg for CaSO, = 6.1 x 10S. Which of the following statements is true? (A) both BaSO4, and CaSO4 would precipitate (B) not enough information is given to determine whether precipitation would occur (C) CaSO4 , would precipitate, but BaSO4, would not (D) BaSO4, would precipitate but  CaSO4  would not (E) neither BaSO4, nor  CaSO4 , would precipitate.

14. 60ee3d663bdd8.jpg is_________for exothermic reactions and_________ for endothermic reactions. (A) favorable, unfavorable (B) favorable, favorable (C) unfavorable, favorable (D) unfavorable, unfavorable (E) cannot tell

15. For the reaction 60ee3db23229a.jpg. Therefore, the reaction under standard conditions is (A) spontaneou us only at temperatures between 10 K and 800 K (B) spontaneous at temperatures greater than 800 K (C) spontaneous at all temperatures (D) nonspontaneous at all temperatures (E) spontaneous at temperatures less than 10 K

16. When a battery dies, which of the following is true? (A)△G° = 0 (B)△G = O (C) E°= O (D) Q= 1 (E) A and C
17. Which of the following statements is/are true of the electrolysis of brine? I: chlorine is produced at the anode of the cell during the electrolysis of brine；Il: under normal circumstances, sodium is produced at the cathode of the cell during the electrolysis of brine； III: hydrogen is produced at the cathode of the cell during the electrolysis of brine. (A) I only (B) II only (C) III only (D) I and II (E) I and Ill
18. How many f orbitals have the value n = 3? (A) 3(B) 1 (C)0(D) 5(E)7
19. How many unpaired electr rons does cobalt have in its ground state? (A) 7 (B) 27 (C) 5 (D)3 (E)1
20. Which of the following exhibits the correct orders (increasing) for atomic radius and ionization energy, respectively? (A) F, S, O, and O, S, F (B) F, O, s, and s, O, F (C) s, O, F, and F, O, s (D) S, F, O, and S, F, O (E) none of these
21. Draw the Lewis structures of the molecules below, and use them to answer the following questions. How many of the molecules have no dipole moment? BH3, NO2, SF6, O3 and PCl5 (A) 2 (B) 4 (C) 1 (D) 3 (E) they are all polar.

22. How many of the following molecules and ions are linear? 60ee3e921b134.jpg (A) 4 (B) 2 (C) 3 (D) 1 (E)0
23. How many of the following molecules have all of their atoms in the same plane? H2C = CH2, F2O, H2CO,NH3, CO2, BeC2 and H2O2 (A) 4 (B) 5 (C) 6 (D) 7 (E) 3

24. Which of the following statements about the 60ee3f137026f.jpg ion is false? (A) the ion has a total of 24 electrons (B) the orbitals on the carbon atom are sp2 hybridized (C) the ion is expected to be diamagnetic (D) one C-O bond is shorter than the others (E) it has a planar molecular geometry

25. An ethyl group60ee3f8974f46.jpg that is attached to a substituent that does not contain a hydrogen atom appears as what in a NMR spectrum? (A) a triplet and a quartet with relative intensities of 3 and 2, respectively (B) a triplet and a quartet with relative intensities of 2 and 3, respectively (C) a doublet and a triplet with relative intensities of 2 and 3, respectively (D) a doublet and a triplet with relative intensities of 3 and 2, respectively (E) none of these

26. How many of the following has a bond order = 0.5? 60ee3fd654fb1.jpg(A) 2(B) 3 (C)4 (D) 1 (E)0

27.In the unit cell of sphalerite, 60ee401dd1b29.jpg ions occupy half the tetrahedral holes in a face-centered cubic lattice 60ee4044a2a60.jpg ions. What is the number of formula units of ZnS in the unit cell? (A) 3 (B) 5 (C) 4 (D) 1 (E) 2

28. Which of the compounds below is an example of a network solid? (A) NaCl(s) (B) S8(s) (C) MgO(s) (D) SiO2(S) (E)60ee4087d38c4.jpg

29. A certain substance, X, has a triple-point temperature of 20℃ at a pressure of 2.0 atm. Which one of the following statements cannot possibly be true? (A) X can exist as a liquid above 20℃  (B) both liquid and solid X have the same vapor pressure at 20℃ (C) liquid X can exist as a stable phase at 25℃ , 1 atm (D) X can exist as a solid above 20℃  (E) all of these statements could be true
30. The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3 . A large increase in pressure will (A) lower the freezing point (B) lower the boiling point (C) lower the triple point (D) raise the triple point (E) raise the freezing point.
31. Which of the following is the most polarizable? (A) Ar (B) He (C) Kr (D) Ne (E) Xe
32. For which of the following compound(s) are cis and trans isomers possible? (A) difluoroethyne (B) 2,3-dichloro-2-butene (C) 3,4-diethyl-3-hexene (D) ortho-chloroanaline (E) 4,4-dimethylcyclohexanol
33. Aspirin is formed via a(r)_______ reaction. (A) combustion (B) hydrogenation (C) condensation (D) substitution (E) addition
34. Which of the following is optically active? (A) 3-chloropentane (B) 1-bromopentane (C) 2-chloropentane (D) dichloromethane (E) dimethylamine
35. Choose the correct molecular structure for XeF6. (A) trigonal planar (B) octahedral (C) trigonal bipyramidal (D) tetrahedral (E) none of these
36. The deciding factor that makes HF a weak acid is that (A) HF has a large bond energy (B) F2 has a small bond energy (C) the entropy for hydration of F- is a large negative value (D) the enthalpy of hydration ofF- is negative (E) F- has the largest ionization energy of all the halide ions
37. How many of the following statements are false?
I：the Group 3A elements are all metals；II：Alkaline earth metals react less vigorously with water than do alkali metals；III：Salts can consist of hydrogen；IV：because Li is the strongest reducing agent among the alkali metals, it reacts most；V：quickly with water of the alkali metals (A) 1(B) 3 (C) 2(D) 4 (E) 0

38. The solubility of the salt60ee41d12c533.jpg. The osmotic pressure exhibited by a solution saturated with Mx,Ay, at 25℃ is 1.22 atm. Determine the values of x and y by assuming ideal behavior. (A) x = 1, y=3 (B) x= 27y = 5 (C) x = 1, y= 1 (D) x= 2 y = 3 (E) none of these
39. A cucumber is placed in a concentrated salt solution. What is most likely to happen? (A) salt will precipitate out (B) water will flow from the solution to the cucumber (C) salt will flow into the cucumber (D) water will flow from the cucumber to the solution (E) no change will occur
40. Liquid A has vapor pressure x. Liquid B has vapor pressure y, and x ＞ y. What is the mole fraction of A in the liquid mixture if the vapor above the solution is 50% A? (A) y/(2x + 2y) (B) y/(x+ y) (C) x/(2x + 2y) (D) x/(x + y) (E) none of these

41. Rank the following compounds according to increasing solubility in water.

I: CH3-CH2-CH2-CH3；ll: CH3-CH2-O-CH2-CH3； III: CH3-CH2-OH； IV:CH3-OH (A) I＜Il＜IV＜III (B) I ＜III＜IV＜I (C)I＜II＜III＜IV(D) III＜IV＜lI＜I (E) none is correct.
42. A liquid-liquid solution is called an ideal solution if I: it obeys PV = nRT； II: it obeys Raoult's law； IIl: solute-solute, solvent-solvent, and solute-solvent interactions are very similar； IV: solute-solute, solvent-solvent, and solute-solvent interactions are quite different. (A) II, IV (B) II, III (C) I, I (D) I, 1, 111(E) I, U, IV

43. How many unpaired electrons are found in60ee429a0ca73.jpg (A) 0(B) 4 (C) 1(D) 5(E) 2
44. Which of the following statements about the complex ion Co(en)2Cl2+ (en = ethylenediamine, NH2CH2CH2NH2)is true? (A) the geometric isomers of the complex ion have identical chemical properties (B) the complex ion exhibits two geometric isomers (cis and trans) and two optical isomers (C) because en is a strong field ligand (large A), the complex ion is paramagnetic (D) the complex ion exhibits cis and trans geometric isomers, but no optical isomers (E) the complex ion contains Co(l)

45. The spectrochemical series is 60ee42f9b3ec9.jpg Which of the following complexes will absorb visible radiation of the highest energy? (A) 60ee431ae26db.jpg(B) 60ee433c57b5e.jpg(C)60ee435a33e2c.jpg(D)60ee437db9be8.jpg(E)60ee439ff09dc.jpg

46. Which of the following complexes would be diamagnetic? (A)60ee43c91fff4.jpg(B) 60ee43e7c4b07.jpg(C) 60ee441191f6c.jpg(D)60ee443aad2cb.jpg(E) Fel(CO)5

47. Which has the greater number of unpaired electrons? I: square planar 60ee44685bbc7.jpg (A) I (B) II (C) neither I nor II has any unpaired electrons (D) more information is needed (E) both I and I| have the same (nonzero) number of unpaired electrons

48. When heat is added to proteins, the hydrogen bonding in the secondary structure breaks apart. What are the algebraic signs of△H and△S for the denaturation process? (A)△H is negative and △S is positive (B) both △H and△S are negative (C) △H is positive and △S is O (D) both △H and △S are positive (E) △H is positive and△S is negative
49. Which of the following polymers is not based on a s substituted ethylene monomer? (A) polystyrene (B) Teflon (C) nylon (D) polyvinylchloride (E) polypropylene
50. Which of the following statements is/are true of alcohols? I: alcohols are characterized by the presence of the hydroxyl group (-OH)； I: the systematic name for an alcohol is obtained by replacing the final -e of the parent hydrocarbon with -oxyl； IIl: alcohols usually have much lower boiling points than might be expected from their molar masses. (A) Ill only (B) II only (C) I only (D) I and III (E) I and 2

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