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Study Resources (Chemistry)

  8.1   Multiple Choice Questions 1) With respect to energy content, reduced forms of matter are generally A) low in potential energy and often make good fuels. B) high in potential energy and often make good fuels. C) low in potential energy and are poor fuels. D) high in potential energy and are poor fuels. 2) Which.
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11) All redox reactions occur with the transfer of A) protons. B) electrons. C) oxygen. D) hydrogen. 12) The black, granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell) is manganese dioxide, MnO2.  The oxidation number of manganese in MnO2 is A) +2. B) -2. C) +4..
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6.2   True/False Questions 1) Supercritical fluids require the use of special equipment to control the temperatures and high pressures needed for their use. 2) Most organic solvents are toxic, but supercritical fluids are generally regarded as safe. 3) Supercritical fluids require the use of special equipment to control the temperatures and high pressures.
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51) Most chemical explosions are ________ reactions. A) nuclear fission B) oxidation-reduction C) neutralization D) precipitation 52) A mixture of ammonium nitrate (NH4NO3) and fuel oil has often been used in terrorist attacks around the world.  Which of the following statements is NOT true for this type of explosive mixture? A) The materials are readily available.
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7.2   True/False Questions 1) Acid-base indicators will change color when the amount of acid present changes. 2) Many acid-base indicators can be extracted from fruit skins or flower petals. 3) Biodiesel fuels are more toxic to the environment than petroleum fuels are. 4) The production of biodiesel fuel and of soap both require the.
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5.2   True/False Questions 1) The reactants are the starting materials in a reaction. 2) In an equation, the number in front of a formula is the coefficient. 3) You can balance a chemical equation by changing the formula of a reactant or a product. 4) According to Avogadro's hypothesis, equal volumes of gases at.
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91) Sodium bicarbonate is commonly known as A) baking soda. B) baking powder. C) washing soda. D) cherry soda. 92) All antacids are A) acids. B) bases. C) neutral. D) salts. 93) Calcium carbonate is a common antacid.  A problem with regular use of calcium carbonate based antacids is they cause A) constipation. B) diarrhea. C) high blood pressure. D) destruction of the stomach.
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8.2   True/False Questions 1) An oxidation reaction often occurs without a corresponding reduction reaction. 2) When a metal reacts with a nonmetal, the metal is oxidized. 3) Zinc is oxidized in the following reaction: Zn  +  2 H+ →  Zn2+  +  H2 4) If the oxidation number of an atom decreases, the atom has.
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31) For which of the following is hydrogen bonding NOT a factor? A) H2O B) NH3 C) CH4 D) CH3OH 32) What type of forces exist between oxygen molecules in liquid oxygen? A) hydrogen bonding B) dipole forces C) dispersion forces D) A mixture of all of these forces exist between oxygen molecules in liquid oxygen. 33) Liquid hydrogen is.
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5.3   Essay Questions 1) Balance the equation:  AlCl3  +  H2SO4  →  Al2(SO4)3  +  6 HCl. 2) Balance the equation:  C8H18  +  O2  →  CO2  +  H2O 3) Balance the equation:  C3H8  +  O2  →  CO2 +  H2O 4) Balance the equation:  Zn  +  CuSO4  →  ZnSO4  +  Cu 5) Balance the equation:  Cu  + .
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7.3   Short Answer Questions 1) The leading chemical produced in the United States is ________. 7.4   Essay Questions 1) Why are acids sometimes referred to as "proton donors?" 2) Lime is used in farming to reduce the acidity of the soil.  The chemical name for lime is calcium oxide.  When water in the soil.
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21) Ammonia can be prepared by the reaction of magnesium nitride with water.  The products are ammonia and magnesium hydroxide.  When the equation is written and balanced, the coefficient of magnesium hydroxide is A) 1. B) 3. C) 6. D) 8. 22) Ammonia can be prepared by the reaction of magnesium nitride with water.  The.
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61) Phenolphthalein has often been used to monitor the progress of an acid-base neutralization reaction.  What color will phenolphthalein be when there is an excess of acid present? A) colorless B) green C) pink D) yellow 62) Phenolphthalein has often been used to monitor the progress of acid-base neutralization reactions.  What color will phenolphthalein be.
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31) An electrochemical cell is a device that converts chemical energy into A) electrical energy. B) chemical energy. C) nuclear energy. D) light energy. 32) A device that generates an electrical current by taking advantage of a difference in the spontaneous tendency of substances to lose and gain electrons is called an A) electrochemical cell. B) electrolysis.
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61) This substance is a powerful oxidizing agent and a harmful pollutant; yet a layer of it in the upper stratosphere serves as a shield from harmful ultraviolet radiation from the sun. A) CO2 B) O2 C) SO3 D) O3 (ozone) 62) Approximately what percentage of the earth's crust is composed of oxygen? A) ≈ 10% B).
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11) Petroleum jelly is A) a mixture of low carbon number hydrocarbons. B) a mixture of moderate carbon number hydrocarbons. C) a mixture of higher carbon number hydrocarbons. D) none of the above 12) What is the name of the compound with a formula CH3CH2CH3? A) methane B) ethane C) propane D) butane 13) A compound containing only carbon and.
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11) Pure oxygen is obtained by liquefying air and then boiling off the nitrogen and argon. 12) Naturally occurring reactions of oxygen (O2) are always desirable. 13) Bleaches are oxidizing agents. 14) Palladium metal can absorb up to 900 times its own volume of hydrogen. 15) In Food Chemistry, reducing agents are sometimes referred.
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71) An unknown substance is added to a solution and the pH increases.  The substance is best described as a(n) A) acid. B) base. C) salt. D) solvent. 72) Which substance has the lowest pH? A) blood B) lemon juice C) unpolluted rainwater D) NaOH (4% solution) 73) Which substance has the highest pH? A) blood B) lemon juice C) unpolluted rainwater D) NaOH.
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71) Oxidizing agents are often used A) as antioxidants. B) as antiseptics. C) to form Ag grains in photography. D) to add hydrogen to an unsaturated fat. 72) An oxidizing agent that was used in older versions of the Breathalyzer test is A) NaHClO (sodium hypochlorite). B) O3 (ozone). C) K2Cr2O7 (potassium dichromate). D) AgBr (silver bromide). 73) Which.
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81) Antioxidants are A) oxidizing agents found in foods. B) reducing agents found in foods. C) fat-soluble. D) water soluble. 82) All of the following are reducing agents EXCEPT A) antioxidants B) coal (coke) C) hydrogen D) chlorine 83) When hydrogen is added to a compound, which of the following can act as a catalyst? A) N B) O C) C D) Pt 84) A.
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61) What is the best way to measure a reaction's efficiency? A) experimental yield B) percent atom economy C) percent yield D) theoretical yield 62) Which of the following types of reactions can have a 100% yield? A) addition reaction B) substitution reaction C) neither addition nor substitution reactions D) both addition and substitution reactions 63) A one molar solution.
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  6.1   Multiple Choice Questions 1) Which state of matter is characterized by having molecules close together, but moving randomly? A) gas B) liquid C) solid D) all of these 2) Which state of matter is characterized by having molecules far apart and moving randomly? A) gas B) liquid C) solid D) all of these 3) Which state of matter is characterized.
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21) Hydrogen gas converts tungsten oxide to tungsten metal.  Hydrogen (H2) is a(n) A) acid. B) base. C) oxidizing agent. D) reducing agent. 22) Which substance is a reducing agent? A) C B) F2 C) H2O2 D) CO2 23) In a reaction, the substance undergoing reduction serves as the A) electron donor. B) proton donor. C) oxidizing agent. D) reducing agent. 24) In a reaction,.
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21) All of the following are bases EXCEPT A) KOH. B) HNO3. C) NH3. D) Mg(OH)2. 22) A useful broad view of reactions between acids and bases involves the A) transfer of protons. B) transfer of electrons. C) conversion of protons into electrons. D) ionization of atoms. 23) Which of the following is a hydroxide ion? A) OH- B) H+ C) H3O+ D) H2O- 24).
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51) Citric acid is made by oranges.  When citric acid dissolves in water, it produces a relatively small number of hydronium ions.  Citric acid is best described as a A) dilute acid. B) concentrated acid. C) weak acid. D) strong acid. 52) An acid is strong if it A) is very concentrated. B) makes acid-base indicators change.
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41) In a solution, the solvent is ________. A) present in larger amount than the solute is B) dissolved in the solute C) always water D) always nonpolar 42) Which of the following is NOT a postulate of the kinetic-molecular theory? A) Molecules of a gas move rapidly and in straight lines. B) The molecules in a.
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  7.1   Multiple Choice Questions 1) Which is NOT a characteristic of acids? A) taste bitter B) turn litmus red C) react with bases to form salts D) react with active metals to form H2 gas 2) Which is NOT a characteristic of bases? A) taste bitter B) turn litmus red C) react with acids to form salts D) produce hydroxide.
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  9.1   Multiple Choice Questions 1) Organic chemistry is most broadly defined as A) the chemistry of living systems. B) the chemistry of substances produced by living systems. C) the chemistry of the compounds of carbon. D) the chemistry of the non-metallic compounds. 2) Approximately what percentage of known compounds are classified as organic compounds? A) ≈ 95% B).
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