Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Oxidation is the and reduction is the. A) loss of oxygen, gain of electrons B) gain of oxygen, loss of mass C) gain of oxygen, loss of electrons D) gain of electrons, loss of electrons E) loss of electrons, gain of electrons 2) A strong electrolyte is one that completely in solution. A) disappears B) ionizes C) dissolves D) reacts E) decomposes 3) The density of ammonia gas in a 4.32 L container at 837 torr and 45eC is g/l. A) 0.717 B) 3.86 C) 0.194 D) 0.432 E) 4.22 x 10-2 4) The main component of air is. A) oxygen B) argon C) nitrogen D) methane E) carbon dioxide 5) DH for an endothermic process is while DH for an exothermic process is. A) negative, positive B) positive, negative C) zero, positive D) positive, zero E) zero, negative 6) The value of DHe for the reaction below is -126 kj. How much heat (in kj) is released when 2.00 mol of NaOH is formed in the reaction? 2Na2O2 (s) + 2H2O (l) 4NaOH (s) + O2 (g) A) 252 B) -126 C) 7.8 D) 63 E) 3.9 7) Objects can possess energy as. (a) endothermic energy (b) potential energy (c) kinetic energy A) a only B) b only C) c only D) a and c E) b and c 1
8) Molecular compounds of low molecular weight tend to be gases at room temperature. Which of the following is most likely not a gas at room temperature? A) CH4 B) Cl2 C) LiCl D) HCl E) H2 9) Which of the following are strong acids? 1) HI 2) HNO3 3) HF 4) HBr A) 1, 2, 4 B) 3, 4 C) 1, 3, 4 D) 1, 2, 3, 4 E) 2, 3, 4 10) Oxidation cannot occur without. A) acid B) reduction C) water D) air E) oxygen 11) Of the following, is a valid statement of Charles' law. A) V T = constant B) V = constant P C) P T = constant D) PV = constant E) V = constant n 12) The molar volume of a gas at STP is L. A) 1.00 B) 14.7 C) 0.08206 D) 22.4 E) 62.36 13) Ca(OH)2 is a. A) strong base B) weak base C) strong acid D) weak acid E) binary compound 14) Ammonia is a. A) strong base B) weak base C) weak acid D) strong acid E) salt 15) Which of the following is soluble in water at 25eC? A) Fe3(PO4)2 B) FeS C) FeCO3 D) Fe(OH)2 E) Fe(NO3)2 16) How many grams of NaOH (MW = 40.0) are there in 500.0 ml of a 0.175 M NaOH solution? A) 114 B) 14.0 C) 3.50 D) 3.50 x 103 E) 2.19 x 10-3 17) The value of DE for a system that performs 213 kj of work on its surroundings and loses 79 kj of heat is kj. A) -213 B) +292 C) -292 D) -134 E) +134 2
18) Which of the following are strong electrolytes? 1) HCl 2) HC2H3O2 3) NH3 4) KCl A) 1, 3, 4 B) 1, 2, 3, 4 C) 1, 4 D) 2, 4 E) 1, 2, 4 19) Which one of the following is a correct expression for molarity? A) mol solute/ml solvent B) mmol solute/ml solution C) mol solute/kg solvent D) mol solute/l solvent E) mmol solute/l solution 20) The kinetic energy of a 7.3 kg steel ball traveling at 18.0 m/s J. A) 66 B) 2.4 x 103 C) 1.2 x 103 D) 7.3 E) 1.3 x 102 21) Which hydroxides are strong bases? 1) Sr(OH)2 2) KOH 3) NaOH 4) Ba(OH)2 A) 2, 4 B) 2, 3, 4 C) 2, 3 D) 1, 2, 3, 4 E) None of these is a strong base. 22) What is the molarity (M) of an aqueous solution containing 22.5 g of glucose (C6H12O6) in 35.5 ml of solution? A) 0.634 B) 3.52 C) 0.197 D) 1.85 E) 0.125 23) With which of the following will ammonium ion form an insoluble salt? A) sulfate B) carbonate C) chloride D) sulfate and carbonate E) none of the above 24) Gaseous mixtures. A) can only contain isolated atoms B) can only contain molecules C) are all heterogeneous D) are all homogeneous E) must contain both isolated atoms and molecules 3
25) Which of the following statements about gases is false? A) Distances between molecules of gas are very large compared to bond distances within molecules. B) Non-reacting gas mixtures are homogeneous. C) Gases expand spontaneously to fill the container they are placed in. D) All gases are colorless and odorless at room temperature. E) Bases are highly compressible. 26) A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is atm. A) 1.5 B) 7.5 C) 0.67 D) 15 E) 3.3 27) The reaction 4Al (s) + 3O2 (g) 2Al2O3 (s) DHe = -3351 kj is, and therefore heat is by the reaction. A) exothermic, released B) exothermic, absorbed C) endothermic, absorbed D) endothermic, released E) thermoneutral, neither released nor absorbed 28) The compound HClO4 is a. A) strong base B) weak base C) strong acid D) weak acid E) binary compound 29) Of the species below, only is not an electrolyte. A) HCl B) NaCl C) Ar D) Rb2SO4 E) KOH 30) Which one of the following compounds is insoluble in water? A) K2SO4 B) Ag2CO3 C) ZnS D) Fe(NO3)3 E) Na2CO3 31) Which one of the following is a diprotic acid? A) hydrofluroric acid B) nitric acid C) sulfuric acid D) chloric acid E) phosphoric acid 32) Of the following, is a correct statement of Boyle's law. A) PV = constant B) V T = constant C) V P = constant D) P V = constant E) n P = constant 4
33) Which one of the following is a weak acid? A) HF B) HNO3 C) HI D) HCl E) HClO4 34) HNO2 is a. A) strong base B) weak base C) strong acid D) weak acid E) binary compound 35) One significant difference between gases and liquids is that. A) a gas is made up of molecules B) a gas may consist of both elements and compounds C) gases are always mixtures D) a gas assumes the volume of its container E) All of the above answers are correct. 36) What is the concentration (M) of an aqueous methanol produced when 0.200 L of a 2.00 M solution was diluted to 0.800 L? A) 8.00 B) 0.500 C) 0.200 D) 0.400 E) 0.800 37) Standard temperature and pressure (STP), in the context of gases, refers to. A) 298 K and 1 torr B) 298 K and 1 atm C) 273 K and 1 torr D) 273 K and 1 atm E) 273 K and 1 pascal 5
Answer Key Testname: 1411-2F.TST MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) E 2) B 3) A 4) C 5) B 6) D 7) E 8) C 9) A 10) B 11) A 12) D 13) A 14) B 15) E 16) C 17) C 18) C 19) B 20) C 21) D 22) B 23) E 24) D 25) D 26) C 27) A 28) C 29) C 30) C 31) C 32) A 33) A 34) D 35) D 36) B 37) D 1