2. The reaction of carbon monoxide and diiodine pentoxide as represented by the equation

Transcription

1 1. The complete combustion of phenylhydrazine, C 6 H 5 NHNH 2, with the oxidizer dinitrogen tetraoxide is shown in the equation C 6 H 5 NHNH 2 + N 2 O 4 CO 2 + H 2 O + N 2 When balanced, the sum of all the coefficients (using smallest whole numbers) is [A] 10. [B] 15. [C] 20. [D] 25. [E] The reaction of carbon monoxide and diiodine pentoxide as represented by the equation is exothermic. The yield could be increased by [A] decreasing the volume of the reaction vessel. [B] increasing the temperature. [D] increasing the pressure. [C] decreasing the temperature. [E] decreasing the pressure. 3. For which of the following systems at equilibrium and at constant temperature will decreasing the volume cause the equilibrium to shift to the right? [A] [C] [E] 4. All the following oxoacids and names 1. H 2 SO 3 sulfurous acid 2. HClO 2 chlorous acid 3. H 2 CO 3 carbonic acid is (are) correct EXCEPT [A] 1 only. [B] 2 only. [C] 3 only. [D] 1 and 2 only. [E] All are correct. 5. Which of the following reactions involves neither oxidation nor reduction? [B] [D] [A] Cu + 2Ag + Cu Ag [C] NH 4 NO 2 N 2 + 2H 2 O [B] N 2 + 3H 2 2NH 3 [D] C 2 H 4 + H 2 C 2 H 6 [E] 2CrO H + Cr 2 O H 2 O 6. Which of the following is a weak electrolyte in aqueous solution? [A] NH 4 Cl [B] HCl [C] Al(NO 3 ) 3 [D] NaCl [E] HC 2 H 3 O 2

2 7. A student is given a sample in lab which contains one of the ions listed below. After adding a few drops of AgNO 3 solution to part of the unknown sample, the student got a greyish precipitate. After adding a few drops of Mg(NO 3) 2 solution to another part of the unknown sample the student got a black precipitate. Based on these observations the only possible ion in this student s sample is: [A] Cl. [B] SO 2 4. [C] C2H 3O 2. [D] F. [E] S The oxoanion that comes from nitrous acid is [A] N O 2 3. [B] NO 3. [C] NO 2. [D] HNO 3. [E] NO. 9. The formula for chlorous acid is [A] HCl. [B] HClO. [C] HClO 2. [D] HClO 4. [E] HClO Which of the following conversions requires an oxidizing agent? [A] C 2 H 4 C 2 H 6 [B] SiF 4 SiF 2-6 [C] 2CrO 2-4 Cr 2 O 2-7 [D] Mn 3+ Mn 2+ [E] SO 2 SO Which of the following is NOT a correct name-symbol combination? [A] copper, Cu [B] arsenic, Ar [C] gold, Au [D] manganese, Mn [E] lithium, Li 12. All the following reactions are described as decomposition reactions EXCEPT [A] 2H 2 O(g) 2H 2 (g) + O 2 (g). [B] CaCO 3 (s) CaO(s) + CO 2 (g). [C] PCl 5 (g) PCl 3 (g) + Cl 2 (g). [D] CH 4 (g) + Cl 2 (g) CH 3 Cl(g) + HCl(g). [E] BaCl 2 2H 2 O(s) BaCl 2 (s) + 2H 2 (O(g). 13. The oxidation numbers of nitrogen in N 2 O and N 2 F 4 are, respectively, [A] 2 and +2. [B] 2 and 3. [C] +1 and 3. [D] +1 and +2. [E] +1 and 1.

3 14. Consider the reaction If the above reactants and products are contained in a closed vessel and the reaction system is at equilibrium, the number of moles of CS 2 can be increased by [A] adding some S 2 Cl 2 to the system. [B] decreasing the temperature of the reaction system. [C] adding some CCl 4 to the system. [D] adding some Cl 2 to the system. [E] increasing the size of the reaction vessel. 15. Which of the following can we determine by using an equilibrium constant for a gaseous reaction system? 1. the effect of changing the volume of the reaction system 2. the extent of a reaction at equilibrium 3. the direction of a reaction upon adding both reactants and products [A] 1 only [B] 2 only [C] 3 only [D] 1 and 2 only [E] 1, 2, and The formula for aluminum sulfate is [A] Al 3 (SO 4 ) 2. [B] Al 3 S 2. [C] Al 2 S 3. [D] AlS. [E] Al 2 (SO 4 ) The equilibrium expression for K c for the system is [A] [CaSO 3]. [B] [CaO][SO ] 2 [D] [CaO][SO 2 ]. [E] [SO 2 ]. 1. [C] [CaO][SO ] 2. [SO 2] [CaSO ] When the equation (CH 3 ) 2 NNH 2 + N 2 O 4 N 2 + H 2 O + CO 2 is balanced, the sum of all the coefficients (simplest whole number) is [A] 9. [B] 10. [C] 11. [D] 12. [E] 13.

4 19. What products result from the addition of aqueous solutions of Cu(NO 3 ) 2 and (NH 4 ) 2 S? [A] CuS(s), NH 3 (g), and H 2 S(g) [C] CuS(s) and NH 4 NO 3 (aq) [B] Cu 2 S(s) and NH 4 NO 3 (aq) [D] CuS(aq) and NH 4 NO 3 (s) [E] CuS(s) and NH 4 NO 3 (s) 20. What is the net ionic equation for the reaction of H 2 SO 3 with Ba(OH) 2? [A] 2H + (aq) + SO 2-3 (aq) + Ba 2+ (aq) + 2OH - (aq) BaSO 3 (s) + 2H 2 O(l) [B] H 2 SO 3 (aq) + Ba(OH) 2 (aq) BaSO 3 (s) + 2H 2 O(l) [C] H + (aq) + OH - (aq) H 2 O(l) [D] H 2 SO 3 (aq) + Ba 2+ (aq) + 2OH - (aq) BaSO 3 (s) + 2H 2 O(l) [E] 2H + (aq) + 2OH - (aq) 2H 2 O(l) 21. The oxidation state of nitrogen given for all the following species is correct EXCEPT [A] HN 3 ( 1). [B] HNO 2 (+3). [C] N 2 O (+1). [D] N 2 H 4 ( 2). [E] NH 2 OH ( 1). 22. All the following compounds are insoluble in water EXCEPT [A] CuS. [B] BaSO 4. [C] Fe(NO 3 ) 2. [D] CuCO 3. [E] CaCO The bromide ion, 80 Br -, contains [A] 45 neutrons and 34 electrons. [C] 35 protons and 80 neutrons. [E] 35 protons and 36 electrons. [B] 45 neutrons and 35 electrons. [D] 35 protons and 35 electrons. 24. A compound dissolves in water to form an aqueous solution that is a poor conductor of electricity. The compound may be composed of [A] a strong acid. [B] ions. [C] a soluble salt. [D] covalent molecules. [E] a strong base.

5 25. Which ONE of the following lists gives the correct symbols for the elements potassium, magnesium, beryllium, and sodium in that order? [A] K, Mn, Br, Na [B] Po, Mn, Br, Na [C] K, Mg, Be, Na [D] Pt, Mg, Be, Sc [E] P, Mn, Be, Se 26. All the following equations are double-displacement reactions EXCEPT [A] Cl 2 (g) + Na 2 SO 3 (s) + H 2 O(l) Na 2 SO 4 (aq) + 2HCl(aq). [B] 2NaOH(aq) + (NH 4 ) 2 SO 4 (aq) Na 2 SO 4 (aq) + 2NH 3 (g) + H 2 O(l). [C] Na 2 CO 3 (aq) + CuSO 4 (aq) Na 2 SO 4 (aq) + CuCO 3 (s). [D] 2NaOH(aq) + H 2 SO 4 (aq) Na 2 SO 4 (aq) + 2H 2 O(l). [E] Na 2 CO 3 (aq) + H 2 SO 4 (aq) Na 2 SO 4 (aq) + H 2 O(l) + CO 2 (g). 27. An ion that has 18e - and a net charge of +2 [A] has 18 neutrons. [C] has the same number of electrons as an argon atom. [B] has 16 protons. [D] is an anion. [E] has the symbol Ar Which of the following is (are) a weak base(s)? 1. Al(OH) 3 2. NH 3 3. LiOH [A] 1 and 2 only [B] 2 only [C] 1, 2, and 3 [D] 3 only [E] 1 only 29. All the following reactions can be described as displacement reactions EXCEPT [A] 2Na(s) + 2H 2 O(l) 2NaOH(aq) + H 2 (g). [B] CuSO 4 (aq) + Fe(s) Cu(s) + FeSO 4 (aq). [C] Zn(s) + FeCl 2 (aq) ZnCl 2 (aq) + Fe(s). [D] C 6 H 6 (l) + Cl 2 (g) C 6 H 5 Cl(l) + HCl(g). [E] Cu(s) + 2AgNO 3 (aq) Cu(NO 3 ) 2 (aq) + 2Ag(s).

6 30. All the following are weak acids EXCEPT [A] HClO 2. [B] H 2 S. [C] HClO. [D] HC 2 H 3 O 2. [E] HBr. 31. Each of the following pairs contains a strong acid and a weak acid, respectively, EXCEPT [A] HNO 3 and HNO 2. [B] HBr and HF. [C] H 3 PO 3 and H 3 PO 2. [D] H 2 SO 4 and H 2 S. [E] HClO 4 and HClO Which of the following contains more electrons than neutrons? [A] S [B] 12 Mg [C] 16 8O 2 [D] Ar [E] 9 19 F 33. How many moles of sulfate ions are there in a 0.20-L solution of molar Al 2 (SO 4 ) 3? [A] [B] [C] [D] [E] The reaction of a mixture of SO 2 and O 2 at a given temperature is represented by the equation When the equilibrium is established, which of the following ratios is constant regardless of the initial concentrations of SO 2 and O 2? [A] 1 2 SO O 2 3 NO [B] 2SO 2SO 3 O 2 2 [C] SO SO 3 O 2 2 [D] SO SO O [E] SO SO 3 O The formulas of the hydroxide ion, the nitrate ion, and the phosphate ion are represented, respectively, as [A] OH -, NO 2 -, PO [B] H -, NO 2 -, P 3-. [C] OH -, NO 2 -, PO [D] H -, NO 3 -, P 3-. [E] OH -, NO 3 -, PO Which of the following is NOT a correct name symbol combination? [A] boron, B [B] beryllium, Be [C] copper, Cu [D] magnesium, Mn [E] cobalt, Co

7 37. For the reaction system at 550 C, K = 67. The equilibrium constant expression is [A] [D] [H 2]. [B] [H O] 2 [Co][H 2O]. [E] [CoO][H ] 2. [H ] [Co][H O] 2 [Co][H 2O]. [C] [CoO][H ] 2 2 [H2O]. [H ] White the balanced chemical equation that represents the following reaction: 39. All the following statements concerning acids and bases are true EXCEPT [A] NH 3 is a Brønsted base because it is a proton acceptor. [B] HCO 3 - is a Brønsted acid because it reacts with NaOH. [C] HCO 3 - is an Arrhenius acid because a NaHCO 3 solution increases the OH - concentration. [D] NH 3 is an Arrhenius base because it increases the OH - concentration in water. [E] HCl is a Brønsted acid because it is a proton donor. 40. Ammonia can be made by reaction of water with magnesium nitride. Mg 3 N 2 (s) + H 2 O(l ) Mg(OH) 2 (s) + NH 3 (g) When the equation is properly balanced, the sum of the coefficients is [A] 6. [B] 8. [C] 9. [D] 12. [E] In which of the following compounds does the underlined element have an oxidation number of 3? [A] CrO 2 Cl 2 [B] PH 4 + [C] HNO 2 [D] NO 2 [E] Zn(OH) An atom that has the same number of neutrons as 59 Ni is [A] 60 Cu. [B] 59 Co. [C] 58 Ni. [D] 58 Fe. [E] 57 Co.

8 43. The name of the S 2 O 3 2- ion is [A] thiosulfite. [B] thiosulfate. [C] sulfate. [D] sulfide. [E] sulfite. 44. Which of the following salts is (are) soluble in aqueous solution? 1. lead(ii) nitrate 2. lead(ii) sulfide 3. lead(ii) carbonate [A] 2 only [B] 3 only [C] 1 and 2 only [D] 1 only [E] 1, 2, and In the balanced equation 3Na + + 3OH - + P 4 + 3H 2 O 3Na + + 3H 2 PO PH 3 the reducing agent is [A] PH 3. [B] OH -. [C] P 4. [D] H 2 O. [E] Na Consider the equilibrium The concentration of PCl 3 at equilibrium will be increased by [A] increasing the pressure. [C] the addition of PCl 5. [B] adding Cl 2 to the system. [D] the addition of neon. [E] decreasing the temperature. 47. Which of the following compounds is a salt? [A] NH 3 [B] NH 4 CN [C] BaO [D] HOClO [E] N 2 O The following reaction occurs in basic solutions. What is the sum of the coefficients in the balanced equation? MnO NH 3 NO MnO 2 [A] 9 [B] 29 [C] 23 [D] 12 [E] Which of the following is a weak electrolyte in aqueous solution? [A] H 2 SO 3 [B] HBr [C] HNO 3 [D] HClO 4 [E] NaOH 50. The formula for the sulfide ion is [A] SO [B] S 2-. [C] HSO 4 -. [D] SO [E] S 2 O 3 2-.

9 51. The formula for aluminum iodide is [A] AlI 2. [B] AlI 3. [C] AI. [D] AlI 4. [E] AlI. 52. Which of the following ionic compounds is INSOLUBLE in water? [A] LiNO 3 [B] KI [C] AgBr [D] CuSO 4 [E] (NH 4 ) 2 CO Treatment of sodium borohydride with sulfuric acid is a convenient method for the preparation of diborane: NaBH 4 + H 2 SO 4 B 2 H 6 + H 2 + Na 2 SO 4 When the equation is balanced, the coefficient for hydrogen is [A] 1. [B] 2. [C] 3. [D] 4. [E] The complete combustion of heptane, C 7 H 16, which is a volatile hydrocarbon, yields carbon dioxide and water: C 7 H 16 + O 2 CO 2 + H 2 O The coefficient of oxygen in the balanced equation is [A] 8. [B] 9. [C] 11. [D] 13. [E] Li(s) + 2H + (aq) + SO 2 4 (aq) 2Li + (aq) + SO 2 4 (aq) + H 2 (g) The reaction shown above between lithium and sulfuric acid is best described as 1. acid-base. 2. oxidation-reduction. 3. precipitation. [A] 1 only [B] 3 only [C] 2 only [D] 1 and 2 only [E] 1, 2, and All the following ions have the same charge EXCEPT [A] sulfide. [B] dichromate. [C] chlorate. [D] sulfate. [E] sulfite. 57. The formulas of the carbonate ion, the ammonium ion, and the chlorate ion are represented, respectively, as [A] CO 3 2-, NH 3 +, ClO 2 -. [B] CO 3 2-, NH 2 -, ClO 3 -. [C] P 3-, NH 3 +, ClO 2 -. [D] CO 2 -, NH 4 +, ClO -. [E] CO 3 2-, NH 4 +, ClO All the following are strong acids EXCEPT [A] H 2 SO 4 [B] HBr [C] HI [D] HF [E] HCl

10 59. Carbon monoxide is toxic because it can successfully compete with oxygen for hemoglobin (Hb) sites according to the following equilibrium From LeChatalier s Principle, how is CO poisoning reversed? [A] by increasing the O 2 pressure [B] by increasing the amount of Hb [C] by increasing the CO pressure [E] by increasing the CO 2 pressure [D] by decreasing the amount of Hb 60. Assign oxidation numbers to each atom in nitric acid. [A] H = +1, N = +3, O = 1 [B] H = +1, N = +3, O = 2 [C] H = +1, N = +3, O = 0 [D] H = +1, N = +5, O = 2 [E] H = +1, N = +5, O = Which of the following is a weak base? [A] KOH [B] Ba(OH) 2 [C] HOCl [D] LiOH [E] NH What is the symbol for the element phosphorus? [A] Pr [B] Po [C] P [D] K [E] Pt 63. The names of the elements whose symbols are Si, P, Mn, and S are, respectively, [A] silicon, potassium, manganese, and sulfur. [B] silver, potassium, manganese, and sodium. [C] silicon, phosphorus, manganese, and sulfur. [D] silicon, potassium, magnesium, and sulfur. [E] silver, phosphorus, magnesium, and sodium. 64. The formulas of the nitrite, phosphide, and nitrate ions are represented, respectively, as [A] NO - 2, PO 3-4, NO - 4. [B] N 3-, PO 3-3, NO - 3. [C] NO -, P 5-, NO - 3. [D] NO - 2, P 3-, NO - 3. [E] NO - 3, PO - 2, N 3-.

11 65. All the following half-reactions are balanced EXCEPT [A] 2Ta + 5H 2 O Ta 2 O H e -. [B] H 2 O 2 2OH - + 2e -. [C] H 3 PO 3 + H 2 O H 3 PO 4 + 2H + + 2e -. [D] NO H + + 3e - NO + 2H 2 O. [E] 2H 2 O + 2e - H 2 + 2OH When solutions of barium chloride and sodium sulfate are mixed, the spectator ions in the resulting reaction are [A] only Cl -. [B] both Na + and Cl -. [C] only Ba 2+. [D] only Na +. [E] only SO Besides its ability to function as an acid, hydrosulfuric acid, H 2 S, is able to act as a reducing agent. Which one of the following equations illustrates this property? [A] H 2 S(aq) + 2AgI(s) Ag 2 S(s) + 2H + (aq) + 2I - (aq) [B] H 2 S(aq) + 2Na(s) H 2 (g) + 2Na + (aq) + S 2- (aq) [C] 3H 2 S(aq) + 2H + (aq) + 2NO - 3 (aq) 3S(s) + 2NO(g) + 4H 2 O(l) [D] H 2 S(aq) + 2OH - (aq) S 2- (aq) + 2H 2 O(l) [E] H 2 S(aq) + Cu 2+ (aq) CuS(s) + 2H + (aq) 68. Which of the following is (are) a weak acid(s)? 1. HNO 3 2. HBr 3. H 2 SO 3 [A] 1 only [B] 1 and 2 only [C] 1, 2, and 3 only [D] 2 only [E] 3 only 69. Dalton s atomic theory consisted of all the following postulates EXCEPT [A] elements are composed of indivisible particles called atoms. [B] with gases, the volumes consumed and produced are in ratios of small whole numbers. [C] atoms combine in fixed ratios of whole numbers. [D] atoms of different elements have different properties. [E] in chemical changes, atoms are not destroyed, created, or changed.

12 70. For the reaction that occurs in a lead storage battery, Pb(s) + PbO 2 (s) + 2H + (aq) + 2HSO - 4 (aq) 2PbSO 4 (s) + 2H 2 O(l) the oxidizing agent is [A] H +. [B] Pb. [C] PbSO 4. [D] PbO 2. [E] HSO Choose the name-formula pair that does NOT match. [A] sodium chlorite, NaClO 2 [B] calcium hydride, CaH 2 [C] calcium hydroxide, Ca(OH) 2 [D] ammonium hydrogen carbonate, NH 4 CO 3 [E] nitric acid, HNO In which of the following reactions does an instantaneous increase in the volume of the reaction vessel favor formation of the products? [A] [C] [E] 73. The formula for aluminum sulfate is [A] Al 2 S 3. [B] Al 3 S 2. [C] Al 2 (SO 3 ) 3. [D] Al 2 (SO 4 ) 3. [E] Al 3 (SO 4 ) 2. [B] [D] 74. The net ionic equation for the reaction of Ba(OH) 2 with H 3 PO 4 is [A] 2H 3 PO 4 (aq) + 3Ba(OH) 2 (aq) Ba 3 (PO 4 ) 2 (s) + 6H 2 O(l). [B] 6H + (aq) + 2PO 3-4 (aq) + 3Ba 2+ (aq) + 6OH - (aq) Ba 3 (PO 4 ) 2 (s) + 6H 2 O(l). [C] H + (aq) + OH - (aq) H 2 O(l). [D] 2H 3 PO 4 (aq) + 3Ba 2+ (aq) + 6OH - (aq) Ba 3 (PO 4 ) 2 (s) + 6H 2 O(l). [E] 2PO 3-4 (aq) + 3Ba 2+ (aq) Ba 3 (PO 4 ) 2 (s).

13 75. At 25 C, the reaction has a K value of Which of the following would be true if the temperature were increased to 100 C? 1. The value of K would be larger. 2. The concentration of ICl(g) would be increased. 3. The partial pressure of I 2 would increase. [A] 1 only [B] 2 only [C] 3 only [D] 1 and 2 only [E] 2 and 3 only 76. The oxidation number of barium in BaO 2 is [A] 2. [B] -1/2. [C] +1. [D] +2. [E] +4.

14 Reference: [4.1.3] [1] [C] Reference: [ ] [2] [C] Reference: [ ] [3] [C] Reference: [2.1.71] [4] [E] Reference: [4.1.72] [5] [E] Reference: [4.1.29] [6] [E] Reference: [ ] [7] [E] Reference: [2.1.70] [8] [C] Reference: [2.1.69] [9] [C] Reference: [4.1.80] [10] [E] Reference: [2.1.35] [11] [B]

15 Reference: [4.1.43] [12] [D] Reference: [4.1.64] [13] [D] Reference: [ ] [14] [E] Reference: [ ] [15] [E] Reference: [2.1.62] [16] [E] Reference: [15.1.3] [17] [E] Reference: [4.1.5] [18] [D] Reference: [4.1.38] [19] [C] Reference: [4.1.55] [20] [D] Reference: [4.1.61] [21] [A] Reference: [4.1.27] [22] [C]

16 Reference: [2.1.14] [23] [E] Reference: [4.1.28] [24] [D] Reference: [2.1.40] [25] [C] Reference: [4.1.39] [26] [A] Reference: [2.1.11] [27] [C] Reference: [4.1.35] [28] [A] Reference: [4.1.9] [29] [D] Reference: [4.1.18] [30] [E] Reference: [4.1.15] [31] [C] Reference: [2.1.17] [32] [C] Reference: [ ] [33] [E]

17 Reference: [15.1.6] [34] [E] Reference: [2.1.48] [35] [E] Reference: [2.1.42] [36] [D] Reference: [15.1.9] [37] [C] Reference: [2.2.91] [38] 3 H 2 + N 2 2 NH 3 Reference: [4.1.59] [39] [C] Reference: [4.1.7] [40] [D] Reference: [4.1.70] [41] [B] Reference: [2.1.12] [42] [A] Reference: [2.1.44] [43] [B] Reference: [4.1.37] [44] [D]

18 Reference: [4.1.79] [45] [C] Reference: [ ] [46] [C] Reference: [4.1.32] [47] [B] Reference: [ ] [48] [B] Reference: [4.1.21] [49] [A] Reference: [2.1.45] [50] [B] Reference: [2.1.59] [51] [B] Reference: [4.1.24] [52] [C] Reference: [2.1.81] [53] [B] Reference: [2.1.76] [54] [C] Reference: [4.1.96] [55] [C]

19 Reference: [2.1.49] [56] [C] Reference: [2.1.46] [57] [E] Reference: [4.1.14] [58] [D] Reference: [ ] [59] [A] Reference: [4.1.90] [60] [D] Reference: [4.1.13] [61] [E] Reference: [2.1.38] [62] [C] Reference: [2.1.41] [63] [C] Reference: [2.1.47] [64] [D] Reference: [4.1.87] [65] [B] Reference: [4.1.23] [66] [B]

20 Reference: [4.1.83] [67] [C] Reference: [4.1.34] [68] [E] Reference: [2.1.1] [69] [B] Reference: [4.1.77] [70] [D] Reference: [2.1.58] [71] [D] Reference: [ ] [72] [C] Reference: [2.1.55] [73] [D] Reference: [4.1.54] [74] [D] Reference: [ ] [75] [D] Reference: [4.1.67] [76] [D]