41. Density compares the of substances which have the same. A) mass; weight D) temperature; mass B) volume; mass E) mass; temperature C) mass; volume
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1 Unit 1 Matter - Honors Chemistry Practice Exam. ALL questions need to be completed for credit towards exam. Practice Exams will be subject to spot checks to ensure students actually attempted all problems. IF students do not have a certain amount of questions correct they may not receive credit for doing practice exam. So students should try hard to answer each question correctly. Students are welcome to stay after school on Tuesdays for help with Ms. Thomas 1. A physical property may be investigated by a. melting ice. c. allowing silver to tarnish. b. letting milk turn sour. d. burning wood. 2. One chemical property of matter is a. boiling point. c. reactivity. b. texture. d. density. 3. Which of the following is an intensive physical property? a. volume c. color b. length d. mass 4. A chemical change occurs when a. dissolved minerals solidify to form a crystal. b. ethanol is purified through distillation. c. salt deposits form from evaporated sea water. d. a leaf changes color. 5. The particles in a solid are a. packed closely together. c. constantly in motion. b. very far apart. d. able to slide past each other. 6. The state of matter in which a material is most likely to resist compression is the a. solid state. c. gaseous state. b. liquid state. d. vaporous state. 7. The state of matter in which a material has definite shape and definite volume is the a. liquid state. c. gaseous state. b. solid state. d. vaporous state. 8. The state of matter in which particles are rigidly held in fixed positions is the a. gaseous state. c. vaporous state. b. liquid state. d. solid state. 9. A substance classified as a fluid contains particles that a. quickly expand into any available space. b. are held in fixed positions. c. may slide past each other. d. are very far from each other. 10. Under ordinary conditions of temperature and pressure, the particles in a gas are a. closely packed. c. held in fixed positions. b. very far from each other. d. able to slide past each other. 11. The substances that are chemically bound together are a. the gases in the air. c. dust particles in air. b. the elements that compose water. d. substances in blood. 12. All of the following are steps in the scientific method EXCEPT a. observing and recording data. b. forming a hypothesis. c. discarding data inconsistent with the hypothesis. d. developing a model. 13. Which of the following observations is quantitative? a. The liquid turns blue litmus paper red. c. The liquid tastes bitter. b. The liquid boils at 100ºC. d. The liquid is cloudy.
2 14. Quantitative observations are recorded using a. numerical information. c. non-numerical information. b. a control. d. a system. 15. A testable statement used for making predictions and carrying out further experiments is a a. law. c. generalization. b. theory. d. hypothesis. 16. The validity of scientific concepts is evaluated by a. collecting facts. c. voting by scientists. b. providing explanations. d. testing hypotheses. 17. A theory is an accepted explanation of an observed phenomenon until a. one study conflicts with the theory. b. repeated data and observation conflict with the theory. c. scientists disagree about the methods used to gather the data. d. an eminent scientist declares that it is inadequate. 36. A measurement that closely agrees with accepted values is said to be a. precise. c. significant. b. reliable. d. accurate. 37. A measurement is said to have good precision if it a. agrees closely with an accepted standard. b. agrees closely with other measurements of the same quantity. c. has a small number of significant figures. d. has a large number of significant figures. 38. Precision pertains to all of the following EXCEPT a. reproducibility of measurements. b. agreement among numerical values. c. sameness of measurements. d. closeness of a measurement to an accepted value. 39. These values were obtained as the mass of products from the same reaction: 8.83 g; 8.84 g; 8.82 g. The known mass of products from that reaction is 8.60 g. The values are a. accurate. c. both accurate and precise. b. precise. d. neither accurate nor precise. 40. When applied to scientific measurements, the words accuracy and precision a. are used interchangeably. c. can cause uncertainty in experiments. b. have limitations. d. have distinctly different meanings. 41. Density compares the of substances which have the same. A) mass; weight D) temperature; mass B) volume; mass E) mass; temperature C) mass; volume 42. Are colloidal particles large enough to be seen under a microscope? A) yes B) no C) there's no way to tell 43. A solution is fundamentally a(n) A) compound B) element C) mixture D) emulsion Use the following to answer questions 44-46:
3 Use the data table below to classify the following mixture Mixture Particles settle out? Particles filter out Tyndall Effect is Original appearance Positive clarity and color 1 Yes Yes Yes Cloudy, gray 2 No No Yes Cloudy, white 3 No No No Clear, green 44. Mixture 3 is a A) a solution B) a suspension C) a colloid D) not enough info is provided 45. Mixture 1 is a A) a solution B) a suspension C) a colloid D) not enough info provided 46. Mixture 2 is a A) a solution B) a suspension C) a colloid D) not enough info is provided 47. Ice floats in water because A) Ice is denser than water C) cold things rise B) water is less dense that ice D) water is denser than ice No questions for A solution is fundamentally a(n) A) compound B) element C) mixture D) emulsion Use the following to answer questions : Identify the mixture with the definition given. A) solution B) colloid C) suspension D) element 54. Rubbing Alcohol 55. Italian salad dressing 56. Mayonnaise 57. A cola soft drink
4 58. Milk 60. The most common solvent is A) alcohol B) benzene C) water D) carbon tetrachloride 61. The compound has the greatest ability to dissolve ionic solids. A) methanol B) ethanol C) water D) toluene 62. Density compares the of substances which have the same. A) mass; weight D) temperature; mass B) volume; mass E) mass; temperature C) mass; volume 63. High surface tension allows water to A) evaporate easily D) form rain drops B) boil at a high boiling point E) expand when cooled C) float as a solid 64. Suspensions, colloids and solutions are types of A) mixtures B) compounds C) elements D) pure substances 65. A physical property of a substance A) can be determined without changing the substance B) depends on the way a substance reacts C) are properties that help support life D) involves breaking the chemical bonds that hold compounds together E) all of these Use the following to answer questions 66-70: Match the observation as a characteristic of one of the following mixture choices: A) colloid B) suspension C) solution D) colloid or suspension E) colloid or solution 66. Positive Tyndall Effect 67. Solids do not settle out in water
5 68. Mixture with the smallest particles 69. A mixture that tends to be clear 70. A mixture that can be changed by filtering 71. A change in which bonds are broken and new bonds are formed, resulting in new substances being produced is called A) an ion B) distillation C) a chemical reaction D) dissolving E) filtration 72. Two or more elements that are bonded in a definite amount are called A) a mixture B) an ion C) a compound D) a colloid E) a solution 73. Pick the two words that are most closely related A) symbol; equation D) formula; compound B) symbol; compound E) equation; element C) formula; reaction 74.In a mixture of salt dissolved in water, the solute is A) the salt. B) the water. C) separated by filtering. D) the precipitate. 75. The density of ice is the density of liquid water. A) greater than B) equal to C) less than D) sometimes greater than, and sometimes less than 76. Suppose you are stranded, with no source of water or food. Which one of the following items would be the most important for you to have with you to insure your survival for three or four days? A) a kilogram of peanuts C) a package of flares B) 10 liters of pure water D) a portable toilet 77. Which of the following is a solution? A) Pure water B) A bottled cola drink C) Italian dressing D) Fresh bacon grease 78. The label on a solid tomato fertilizer says "ammonium phosphate, ammonium sulfate, muriate of potash, sulfate of potash, sulfate of potash-magnesia, manganese oxide, iron oxide." The fertilizer is a A) solution B) compound C) mixture D) pure substance
6 79. The shape of the water molecule is best described as A) Linear B) V shaped C) Circular D) Water molecule has no shape 80. When we say water is very polar, what do we mean? A) Water is very cold and comes from polar regions. B) One end of the molecule has a slight positive charge and the opposite end has a slight negative charge. C) The molecule itself has a slight electrical charge D) The molecule is magnetic and can be used as a compass. 81. A clear green liquid is sitting in a beaker. No settling is observed. When a beam of light is aimed through the beaker the beam cannot distinctly be seen in the liquid. What kind of mixture is this most likely? A) Suspension B) Colloid C) Solution D) Slime juice 82. Ice floats in water because A) Ice is denser than water C) cold things rise B) water is less dense that ice D) water is denser than ice 83. Which is the correct ranking (least to highest) of the density of water? A) gas, solid, liquid C) solid, gas, liquid B) gas, liquid, solid D) liquid, gas, solid 84. Which statement correctly describes the type and quantity of atoms in the molecule Ca(OH) 2 A) 1 calcium, 1 oxygen, 2 hydrogen C) 2 calciums, 2 oxygens, 2 hydrogens B) 1 calcium, 2 oxygens, 2 hydrogens D) 1 californium, 1 oxygen, 2 hydrogen Use the following to answer questions : Match the following term with the best definition. A) The homogeneous mixture of two or more substances B) Uniform throughout C) Macro-size particles that remain in a suspension D) Not uniform throughout E) Having large, dispersed particles 86. Colloid 87. Homogeneous 88. Heterogeneous
7 89. Suspension 90. Solution Use the following to answer questions 91-95: Match the following term with the best definition. A) Composed of two or more elements not physically separable B) Where the original substances of a chemical formula are written C) This leads to rain and snow D) The "glue" in molecules E) Where formulas are written indicating new substances 91. Reactant Side 92. Chemical Bond 93. Product Side 94. Compound 95. Condensation Use the following to answer questions 96-97: Match the following term with the best definition. A) The dissolved substance B) Having regions of positive and negative charge C) The dissolving agent D) Uniform throughout 96. Solute 97. Homogeneous 98. In the following example FeO + CO Fe + CO 2, the compound(s) are called the reactants. A) FeO + CO B) FeO only C) Fe + CO 2 D) Fe only
8 99. Water is a polar molecule. Which statement is not related to this fact? A) Water molecules stick together. B) The oxygen end of water has a negative charge. C) Water is held together by an ionic bond. D) Water has a high boiling point. E) Water has a high surface tension. Use the following to answer question : Select the best term from the following choices that best fits the definition. A) concentration B) solute C) saturated D) solubility E) unsaturated 100. The substance which dissolves into a solution 101. One reason why water is considered to be one of the most rare and unusual substances in the universe is that: A) water is composed of atoms, bonded into molecules. B) water molecules are attracted to each other. C) water expands when it freezes. D) water has a definite boiling point and a definite melting point. 102.Suppose an unknown liquid demonstrates the Tyndall effect, but cannot be separated by filtering. It's most likely a: A) suspension B) colloid C) solution D) coagulate 103 Are colloidal particles large enough to be seen under a microscope? A) yes B) no C) there's no way to tell
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