112年 - [無官方正解]112 台灣聯合大學系統_學士班轉學生考試試題_A6：普通化學#139065

1 How many protons, neutrons, and electrons are present in an atom of the sulfur-31 isotope?(p = proton, n = neutron, e = electron)(A)15p,16n,15e(B)16p,15n,16e(C)15p,16n,16e(D)15p,15n,16e
(E)16p,16n,15e

2 What is the empirical formula of manganosite, a compound consisting of manganese-55 and oxygen-16, if 77% of its mass is attributed to manganese?(A)MnO(B)Mn₂O₃(C)MnO₂(D)Mn₂O₂
(E)Mn₃O₂

3 The oxidation number of S in K₂SO₄ is(A)+6(B)+4(C)+2(D)-2
(E)-4

4 What are the predicted products of the single replacement reaction between solid iron (Fe) and aqueous copper(II) sulfate?(A)Cu(s)+FeSO₄(aq)(B)Fe(s)+Cu(s)+SO₄(aq)(C)CuS(s)+Fe₂SO₄(aq)(D)FeCuSO₄(aq)
(E)FeO(s)+CuSO₃(aq)

5 Calculate the density of SF₆ gas at a temperature of 27°C and a pressure of 0.500 atm, expressed in grams per liter (g/L).(A)3.38 g/L(B)2.24 g/L(C)2.96 g/L(D)22.4 g/L
(E)33.8 g/L

6 Among these compounds, which one is most likely to exhibit covalent bonding?(A)Rb₂S(B)SrCl₂(C)CS₂(D)CaO
(E)MgI₂

7 Among these pairs of atoms, which one would likely form the most polar bond?(A)B-C(B)C-N(C)C-O(D)Si-O
(E)C-C

8 Among these compounds, which one is most likely to exhibit ionic bonding?(A)NCl₃(B)BaCl₂(C)CO(D)SO₂
(E)SF₄

9 Which of the following molecules possesses tetrahedral geometry?(A)XeF₄(B)BF₃(C)AsF₅(D)CF₄
(E)NH₃

10 How many atoms are present in a body-centered cubic unit cell?(A)1(B)2(C)3(D)4
(E)8

11 In a face-centered cubic lattice of a metal, each atom is surrounded by how many nearest neighbors (atoms in contact)?(A)4(B)6(C)8(D)10
(E)12

12 Given that the molar heats of sublimation and fusion of iodine are 62.3 kJ/mol and 15.3 kJ/mol, respectively, calculate the molar heat of vaporization of liquid iodine.(A)77.6 kJ/mol(B)47.0 kJ/mol(C)-47.0 kJ/mol(D)-77.6 kJ/mol
(E)7.76 kJ/mol

13 Which of the following statements is false according to Raoult's law?(A)The vapor pressure of a solvent over a solution decreases as its mole fraction increases.(B)The solubility of a gas increases as the temperature decreases.(C)The vapor pressure of a solvent over a solution is less than that of pure solvent.(D)The greater the pressure of a gas over a solution the greater its solubility.
(E)Ionic solutes dissociate in solution causing an enhancement of all colligative properties.

14 Among these 0.10 M solutions, which one will have the lowest pH?(A)HCN(B)HNO₃(C)NaCl(D)H₂CO₃
(E)NaOH

15 Arrange the acids HOCl, HClO₃, and HClO₂ in order of increasing acidity.(A)HOCl＜HClO₃＜HClO₂(B)HOCl＜HClO₂＜HClO₃(C)HClO₂＜HOCl＜HClO₃(D)HClO₃＜HOCl＜HClO₂
(E)HClO₃＜HClO₂＜HOCl

16 At constant T and P, a negative sign for ΔG indicates that(A)the reaction is exothermic.(B)the reaction is endothermic.(C)the reaction is fast.(D)the reaction is spontaneous.
(E)ΔS must be＞0.

17 For the reaction H₂(g)+S(s)→H₂S(g), ΔH°=-20.2 kJ/mol and ΔS°=+43.1 J/K·mol. Which of these statements is true?(A)The reaction is only spontaneous at low temperatures.(B)The reaction is spontaneous at all temperatures.(C)ΔG° becomes less favorable as temperature increases.(D)The reaction is spontaneous only at high temperatures.
(E)The reaction is at equilibrium at 25°C under standard conditions.

18 In the complex ion [Cr(C₂O₄)₂(H₂O)₂]⁻, the oxidation number of Cr is(A)+1(B)+2(C)+3(D)+4
(E)+5

19 How many unpaired electrons are there in the complex ion [Mn(CN)₆]³⁻?(A)0(B)1(C)2(D)3
(E)4

20 Which of the following species are radicals?(A)CH₂O(B)HCN(C)HClO(D)ClONO₂
(E)ClO

21 Which of the compounds listed below has the weakest hydrogen bonds?(A)CH₄(B)H₂O(C)SiH₄(D)HF
(E)H₂S

22 Why is the bond dissociation energy of C-C greater than that of C-H?(A)due to enhanced sigma bond overlap.(B)because the bond is electrostatically stronger.(C)because multiple bonds are always stronger than single bonds.(D)due to the decreased bond dipole.
(E)It is not; the dissociation energy is greater for C-H.

23 All of the following have a linear shape except for which one(A)IF₂⁻(B)CS₂(C)XeF₂(D)I₃⁻
(E)NH₂⁻

24 If 2.0 moles of an ideal gas at STP are subjected to a new pressure of 24.7 kPa, what will be the volume of the gas?(A)8.20 L(B)22.4 L(C)11.2 L(D)184 L
(E)91.9 L

25 Consider the following reaction: 4NaO₂(s)+2CO₂(g)→2Na₂CO₃(s)+3O₂(g). How many moles of NaO₂ are required to react with 75.0 L of CO₂ at STP?(A)0.15(B)1.67(C)3.35(D)6.70
(E)13.4

37 The chemical formula for diborane is(A)BH₃(B)B₂H₆(C)B₂H₄(D)B₂H₂
(E)B₂H

38 The geometry of PCl4⁺ is(A)T-shaped.(B)tetrahedral.(C)seesaw.(D)trigonal bipyramidal.
(E)trigonal pyramidal.

39 Which of the following is considered unstable?(A)HFO(B)HBrO(C)HClO(D)HI
(E)HF

40 Which of the following is not an example of a redox reaction?(A)3Mg+N₂→Mg₃N₂(B)2P³⁻+6H₂O→2PH₃+6OH⁻(C)2NaN₃→2Na+N₂(D)2NO+O₂→2NO₂
(E)N₂H₄+O₂→N₂+2H₂O

41 How many unpaired electrons can be predicted for a tetrahedral iron(II) complex?(A)1(B)2(C)3(D)4
(E)5

42 Elements with an odd number of protons and neutrons(A)are usually stable.(B)are usually unstable.(C)always have a proton-to-neutron ratio of about 1.(D)never undergo α emission.
(E)have a magic number of protons or neutrons.

43 When a β particle is emitted, the mass number(A)decreases by 4.(B)increases by 1.(C)decreases by 2.(D)decreases by 1.
(E)does not change.

44 Which of the following is a secondary alcohol?(A)CH₃CH₂OH(B)C₆H₅CH₂OH(C)C(CH₃)₃OH(D)CH₃(CH₂)₃OH
(E)CH(CH₃)₂OH

45 The -OH group occurs in(A)aldehydes.(B)amides.(C)carboxylic acids.(D)ketones.
(E)esters.

46 Which of the following compounds lacks the carbonyl group?(A)amides.(B)ketones.(C)carboxylic acids.(D)aldehydes.
(E)phenols.

47 Which of the following terms refers to a peptide bond?(A)-C(O)O-(B)-CONH-(C)-C(O)OC(O)-(D)-C=N-
(E)-OP(O)₂O-