Review Multiple Choice Questions

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1 Chapter 2 Matter and Changes Review Multiple Choice Questions 1. The random molecular motion of a substance is greatest when the substance is a. condensed b. a liquid c. frozen d. a gas 2. After elements A & B react to completion in a closed container, the ratio of masses of A and B in the container will be the same as before the reaction. This is true because of the law of a. definite proportion b. multiple proportions c. conservation of mass d. conservation of energy 3. Which one of the following is not a PHYSICAL change? a. ice melting b. salt dissolving in water c. iron rusting d. a rock being crushed 4. Which of the following is not a chemical reaction? a. dissolving salt in water c. combustion of wood in a fireplace b. fading of a black sweater by sunlight d. curdling of milk. 5. When atoms of a substance are geometrically arranged in a predictable, non-random pattern, the substance is a: a. gas b. liquid c. solid d. plasma 6. All of the following are physical properties of sucrose EXCEPT: a. forms solid crystals are room temp c. breaks down into C and H 2 O (g) when heated b. appears as white crystals d. tastes sweet Chapter 4 Atomic Structure 7. Which is the following is the correct ranking of increasing size of the following examples of sodium: atom, ion, nucleus, proton, neutron and electron. (The first is the smallest, the last is the largest.) a. Ion, atom, proton, neutron, electron, nucleus b. Nucleus, proton, neutron, electron, atom, ion. c. Electron, neutron, proton, nucleus, atom, ion. d. Electron, neutron, proton, nucleus, ion, atom. e. Neutron, electron, proton, nucleus, atom, ion. 8. An atom has no net electrical charge because a. its subatomic particles carry no electrical charges b. the positively charged protons cancel out the negatively charged neutrons. c. The positively charged neutrons cancel out the negatively charged electrons. d. The positively charged protons cancel out the negatively charged electrons In the reaction 4 Be + X 12 6 C n, the X represents a. an alpha particle b. a beta particle c. an electron d. a proton

2 10. When an atom emits a ß-particle from its nucleus the resulting nucleus contains a. one less proton and one more neutron b. one more proton and one more neutron c. one less proton and the same number of neutrons d. one more proton and one less neutron 11. How many total electrons does Cl - have? a. 17 b. 18 c. 16 d Which of the following is a product of α decay of 92 U? a. Th b. c. d. e Np 91 Pa 92U 94 Pu Chapter 5 - Electrons in Atoms 13. Which of the following atoms has six valence electrons? a. Magnesium b. Silicon c. Sulfur d. Argon 14. Using noble gas notation, the ground state electrons configuration for Cd is a. [Kr]4d 1 04f 2 b. [Ar]4s 2 3d 10 c. [Kr]5s 2 4d 10 d. [Xe]5s 2 4d The complete electron configuration of a scandium atom is a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1 b. 1s 2 2s 2 2p 7 3s 2 3p 7 4s 2 3d 1 c. 1s 2 2s 2 2p 5 3s 2 3p 5 4s 2 3d 1 d. 1s 2 2s 1 2p 7 3s 1 3p 7 4s 2 3d How many valance electrons does Zr have? a. 2 b. 6 c. 1 d Which of the following is the electron configuration for Mn? a. [He] 2s 2 2p 3 b. [Ar] 4s 2 3d 5 c. [Ne] 3s 2 d. [Ar] 4s 2 3d What element has the electron configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 4? a. Se b. Ru c. Te d. I e. Bi 19. Which of the following elements has the same Lewis dot structure as silicon a. Germanium b. Aluminum c. Arsenic d. Gallium

3 Chapter 6 - The Periodic Table 20. Two different elements are located in different portions of the periodic table. Element A is on the far upper left side (not Hydrogen); element B is a halogen. Which statement(s) is/are true? a. Element A is a metal and B is a non-metal. b. The combination of A & B results in an ionic compound. c. Element A has a smaller atomic number than element B. d. Element B has fewer valence electrons than A. e. Element A is an alkali earth metal. 21. Which of the following are incorrectly paired? a. Na, alkali metal b. Mg, alkaline earth metal c. Br, halogen d. Ar, noble gas e. Sn, transition metal 22. Consider the following orderings. Al < Si < P < Cl Be < Mg < Ca < Sr I < Br < Cl < F Which of these give(s) a correct trend in ionization energy? a. III b. I, II c. I d. I, III e. none of them 23. Which of the following statements is false? a. A sodium atom has a smaller radius than a potassium atom. b. A neon atom has a smaller radius than an oxygen atom. c. A fluorine atom has a smaller first ionization energy than an oxygen atom. d. A cesium atom has a smaller first ionization energy than a helium atom. e. All are true. 24. The elements of group 2 a. Are in the same horizontal row of the periodic table b. Are generally different in their chemical reactivity c. Have different number of valance electrons d. Are generally similar in their chemical and physical properties e. Have different outer electron configurations 25. Arrange the following elements in order of increasing atomic radii: K, Na, Mg, Cs, Cl a. Na, Mg, Cl, K, Cs b. Cl, Mg, Na, K, Cs c. Cs, K, Cl, Mg, Na d. Cl, Mg, Cs, K, Na e. Cl, Mg, Na, Cs, K 26. Which of the following is INCORRECTLY classified? a. Se / metal b. Cr / metal c. Ag / metal d. Si / metalloid e. C / nonmetal

4 Chapter 7 & 9 - Ionic Compounds 27. The anion in AlPO 4 has a charge of a. 2+ b. 3+ c. 2- d. 3- e. cannot determine without more information. 28. Which of the following pairs is incorrect? a. NH 4 Br, ammonium bromide b. K 2 CO 3, potassium carbonate c. BaPO 4, barium phosphate d. CuCl, copper (I) chloride e. MgO, magnesium oxide 29. A compound in which the nitrate to metal ion ratio is 2:1 has the following formula? a. M(NO 3 ) 2 b. M(NO 3 ) 4 c. M 2 NO 3 d. MNO 3 e. M 6 NO When the calcium ion is combined with the sulfate ion, the following neutral compound is produced a. CaS b. CaSO 4 c. Ca 2 (SO 4 ) 3 d. Ca(SO 4 ) 2 e. Ca 2 S The combination of a positively charged metal to a negatively charged non-metal which results in a neutrally charged substance is a(n): a. polyatomic ion c. molecular compound b. monatomic ion d. ionic compound 32. The correct formula for iron (II) oxide is a. Fe 2 O 3 b. IrO c. FeO d. Ir 2 O The correct formula for calcium phosphate is a. CaPO 4 b. Ca(PO 4 ) c. Ca 3 (PO 4 ) 2 d. 3Ca2PO 34. Which of the following ion formulas is NOT correctly stated? a. NO 3 b. CO 2 c. Fe d. MnO Which of the following formulas for magnesium hydroxide is correctly written? a. Mg(OH) 2 b. MgOH c. MgOH 2 d. Mg 2 OH 36. Which of the following does not represent an ionic compound? a. LiNO 3 b. MgO c. KF d. CO 2 Chapter 8 & 9 - Covalent Bonding 37. The proper name for the molecular compound N 2 Cl 5 is a. Dinitride pentachloride b. Dinitrogen pentachlorine c. Dinitride pentachlorine d. Dinitrogen pentatchloride e. Nitrogen chloride

5 38. Which of the following molecules contains a double bond? a. CO 2 b. NH 3 c. H 2 O d. All e. none 39. How many total lone pairs of electrons are on the molecule, NF 3? a. 0 b. 1 c. 6 d. 9 e How many of the 6 valance electrons in sulfur are used in covalent bonding in sulfur tetrachloride and sulfur difluoride? a. 3 and 2 b. 6 and 1 c. 4 and 2 d. 2 and 2 e. Chapter 11 - Chemical Reactions 41. On a separate piece of paper, balance the following equation using the coefficient of 1 already given to Al 4 C 3. C + Al 2 O 3 1 Al 4 C 3 + CO In the correctly balanced equation, the coefficient of carbon, C, is a. 3 b. 6 c. 9 d On a separate piece of paper, balance the equation below and choose the correct coefficient. Pb(NO 3 ) 2 + KCl KNO 3 + PbCl 2 a. 2, 2, 1, 2 b. 1, 2, 2, 1 c. 1, 2, 1, 2 d. 2, 1, 2, Which of the following displacement reactions will NOT occur? (use activity series) a. CuSO 4 (aq) + Zn(s) ---> Cu(s) + ZnSO 4 (aq) b. 2NaNO 3 (aq) + Zn(s) ---> 2Na(s) + Zn(NO 3 ) 2 (aq) c.2agno 2 (aq) + Zn(s) ---> 2Ag(s) + Zn(NO 3 ) 2 (aq) d. 2HCl(aq) + Zn(s) ---> H 2 (g) + ZnCl 2 (aq) Chapter 10- Chemical Quantities: The Mole 44. Two moles of (NH 4 ) 2 S has a mass of a. 76 g b. 100 g c. 136 g d. 2 x (6 x ) g 45. Which one of the following is NOT a valid CHEMICAL example of a mole? a x particles c. the number of atoms in 12.0 grams of carbon 12 b. Avagadro s number of particles d. a small, burrowing, gopher-like animal 46. How many moles of NaOH are in 10.0 grams of NaOH? Molar mass of NaOH = 40 g/mol a mol b. 400 mol c x mol d. 1.5 x mol 47. How many molecules are present in 22.0 grams of CO 2? (molar mass of CO 2 = 44 g/mol) a. 0.5 molecules b. 2.0 molecules c. 3.0 x molecules d. 2.0 x molecules 48. How many grams of CO 2 are present in 0.20 moles of CO 2? Molar mass = 44 g/mol a. 44 g b. 8.8 g c. 220 g d. 4.4 g

6 Classify the chemical reactions in questions 49-55, using the following key: a. single displacement c. combustion e. decomposition b. double displacement d. synthesis Al + Fe 3 N 2 2 AlN + 3Fe Na + Cl 2 NaCl 51. C 7 H O 2 4 H 2 O + 7 CO Ag 2 S 16 Ag + 1 S KBr + Fe(OH) 3 3 KOH + FeBr H 2 O 2 2 H 2 O + O ZnS + 2 AlP Zn 3 P 2 + Al 2 S 3 Ch 12 - Stoichiometry 56. Given the following balanced equation, how many grams of aluminum oxide are formed from 13.5 g of aluminum? Molar mass: Al: 27.0, Al 2 O g/mol 4 Al + 3 O2 2 Al 2 O 3 a g b g c g d g Questions refer to the following: A lab experiment was run in which material X was reacted with material Y to produce material Z as shown in the below equation. A stoichiometry calculation showed that 50.0 g of Z should be produced, but in the lab only 45.0 g were obtained. 1 X + 1 Y 1 Z 57. The theoretical yield was a g b g c. 5.0 g d g 58. The actual, or experimental yield was a g b g c. 5.0 g d g 59. The % yield was a % b % c. more than 100 % d. less than 50 % 60. The balanced equation for the reaction between zinc and sulfur is Zn + S ZnS. The only statement below which is consistent between zinc and sulfur is: a. 1 mol Zn + 1 mol S 2 mol ZnS c. 1 g Zn + 1 g S 1 g ZnS b. 20 atoms Zn + 20 atoms S 40 atoms of ZnS d g Zn g S 97.4 g ZnS Chapter 13/14 - Gases 61. Which of the following variables (amount, pressure, temperature, volume) have an indirect mathematical relationship? a. amount and volume c. pressure and temperature b. volume and pressure d. temperature and volume

7 62. If a rigid container of oxygen is submerged in sixty feet of water, it does not crush. Which of the following is NOT correct? a. the pressure of the oxygen does not change b. the container exerts a pressure outward on the water c. the water pressure is nearly 2 atmospheres d. the oxygen molecules are closer together under water L of a gas at 27 atm will occupy what volume at 30 atm? a L b L c. 75 L d L 64. At 250 K a gas had a pressure of atm. At what temperature would it be at 1.32 atm? a. 162 K b. 281 K c. 387 K d. 402 K

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