front 1 A polar molecule is one that has a. a more positive side and a more negative side b. an even distribution of charge c. one large atom and one small atom d. a positive or negative charge e. only polar atoms | back 1 a. a more positive side and a more negative side |
front 2 ![]() Which is an adequate description of this hydrocarbon? a. it is a polyunsaturated hydrocarbon b. it is a multi unsaturated hydrocarbon c. it is a saturated hydrocarbon d. it is an unsaturated hydrocarbon | back 2 d. it is an unsaturated hydrocarbon |
front 3 Compounds that are used as fuels a. contain weak bonds b. contain C--C bonds c. contain C--H bonds d. are high in potential energy e. all of these are used a fuels | back 3 e. all of these are used as fuels |
front 4 ![]() An overview of metabolism is shown in the following figure. What does this figure tell us about the energy of catabolism and anabolism? a. catabolism is exothermic, and anabolism is endothermic b. overall, we every more energy than we consume c. anabolic reactions occur more quickly than catabolic reactions d. overall, the amount of energy that goes into anabolic processes is the same as is released in catabolic processes e. the conservation of energy does not apply to biological systems | back 4 a. catabolism is exothermic, and anabolism is endothermic |
front 5 What os the BEST name for the compound SF6, a potent greenhouse gas? a. sulfur pentafluoride b. sulfur fluoride c. monosulfur fluoride d. sulfur hexafluoride e. sulfur fluorine | back 5 d. sulfur hexafluoride |
front 6 ![]() Which of the following diagrams illustrates an exothermic reaction? a. II only b. I only c. II and III d. I and II e. I and III | back 6 b. I only |
front 7 _______________ are the subatomic particles that have the smallest mass. a. Protons b. Electrons c. Neutrons d. Protons and neutrons e. Protons, neutrons, and electrons | back 7 b. Electrons |
front 8 ![]() The boxed species in the following reaction is a. a hydronium ion b. the conjugate acid c. a proton d. the acid e. a hydroxide ion | back 8 e. a hydroxide ion |
front 9 The identity of an element is determines by its number of ________________. a. protons, neutrons, and electrons b. protons and neutrons c. neutrons d. electrons e. protons | back 9 e. protons |
front 10 ![]() Which structures are straight-chain hydrocarbons? a. I and III b. II and IV c. I only d. II, III, and IV e. All of these molecules have a straight chain | back 10 a. I and III |
front 11 Which of the following definition BEST describes structural isomers? a. They are molecules that differ by carbon-carbon bond rotation b. They are molecules that have the same molecular formula but different atom connectivity c. They are molecules with the same molecular formula and the atom connectivity d. They are molecules with different atom connectivity e. They are molecules with the same physical properties | back 11 b. They are molecules that have the same molecular formula but different atom connectivity |
front 12 Which of the following statements BEST describes what happens when an acid reacts with water? I. The acid donates a proton. II. Water donates a proton. III. Water acts as a base. IV. Hydronium is formed. V. Hydroxide is formed. a. I, III, and V b. II and V c. I, III, and IV d. I only e. II only | back 12 c. I, III, and IV |
front 13 The nucleus is composed of _______________. a. electrons b. neutrons c. protons, neutrons, and electrons d. protons e. protons and neutrons | back 13 e. protons and neutrons |
front 14 ![]() The boxed species in the following reaction is a. the conjugate base b. a hydronium c. a proton d. a hydroxide e. the acid | back 14 a. the conjugate base |
front 15 A hydrogen atom without an electron is referred to as a. hydronium b. a proton c. a conjugate base d. an acid e. hydroxide | back 15 b. a proton |
front 16 ![]() Which part of the following energy diagram is changed when a catalyst is added, and how is it changed? a. II is higher b. II is lower c. I is higher d. III is higher e. I is lower | back 16 b. II is lower |
front 17 A conjugate acid-base pair is a. the products of an acid-base reaction b. two species that differ only by a proton c. the reactants in an acid-base reaction d. two species that differ only by a hydroxyl group e. a single molecule that can act as both an acid and a base | back 17 b. two species that differ only by a proton |
front 18 Which element is the MOST electronegative? a. carbon b. sulfur c. nitrogen d. oxygen | back 18 d. oxygen |
front 19 ![]() Ethylene is used a a starting material in making plastics. It has a molecular formula of C2H4-. Which of the following structures is the correct Lewis structure for ethylene? a. structure a b. stricture e c. structure b d. structure d e. structure c | back 19 a. structure a |
front 20 Which of the following ions os a polyatomic ion? a. O2- b. NH4 + c. O2 d. Mg2+ | back 20 b. NH4 + |
front 21 ![]() Propane is a fuel commonly used in barbecues and to heat homes. It has the structure shown below. Does propane have a permeant dipole? a. Yes. One side of the molecule is always partially positive, and the other side is partially negative b. Yes. The carbon is partially positive, and the hydrogen is partially negative c. Yes. The carbon is partially negative, and the hydrogen is partially positive d. No. Propanse has a temporary dipole e. No. Propane never displays any dipole at all | back 21 d. No. Propane has a temporary dipole |
front 22 The only interactions between two or more molecules of a non polar material such as methane (CH4) are ________________ because these molecules do not have permanent dipoles. a. covalent bonding b. dispersion forces c. dipole-dipole forces d. ionic bonding e. hydrogen bonding forces | back 22 b. dispersion forces |
front 23 Which of the following statements about acids is FALSE? a. an acid increases the concentration of protons in solution b. an acid is a proton donor c. an acid increases the concentration of hydronium in solution d. an acid increases the concentration of hydroxide in solution | back 23 d. an acid increases the concentration of hydroxide in solution |
front 24 When MgCl2 dissolves in water, it produces Mg2+ and Cl- ions. Which statement BEST describes the interaction between Cl- and water? a. Chloride anions are attracted to the partial positive charge of hydrogen b. Chloride anions are attracted to the partial negative charge of hydrogen c. Chloride anions are attracted to the partial positive charge of oxygen d. Chloride anions are not attracted to any part of water e. Chloride anions are attracted to the partial negative charge of oxygen | back 24 a. Chloride anions are attracted to the partial positive charge of hydrogen |
front 25 The following is the reaction of propanoic acid in water. Which choice is a conjugate acid-base pair in this reaction? C3H5O2H (aq) + H2O (l) ⟷⟷ C3H5O2 – (aq) + H3O+(aq) propanoic acid propanoate a. propanoate and water b. propanoic acid and hydronium c. propanoate and hydronium d. propanoic acid and water e. propanoic acid and propanoate | back 25 e. propanoic acid and propanoate |
front 26 ![]() Does formaldehyde have a permanent dipole? a. Yes. The carbon is partially positive and the oxygen is partially negative b. No. Formaldehyde only has a temporary dipole c. Yes. The carbon is partially negative and the oxygen is partially positive d. Yes. The carbon is partially negative and the hydrogen is partially positive e. Yes. The carbon is partially positive and the hydrogen is partially negative | back 26 a. Yes. The carbon is partially positive and the oxygen is partially negative |
front 27 Carbon tetrafluoride is a refrigerant and potent greenhouse gas. Which of the following is the molecular formula for this component. a. CF4 b. C(IV)F c. C4F4 d. CF e. C4F | back 27 a. CF4 |
front 28 How many valence electrons are there in an oxygen atom? a. 6 b. 2 c. 4 d. 8 | back 28 a. 6 |
front 29 Match the atomic symbol and ion symbol with the correct terms. Mg2+ Cl- Cδ+ F δ- a. cation anion cation anion b. cation anion partially+ C partially- F c. anion cation anion cation d. cation anion partially- C partially+ F e. anion cation partially- C partially+ F a. choice a b. choice e c. choice c d. choice b e. choice d | back 29 d. choice b |
front 30 ![]() Consider solution A and B separated by a semipermeable membrane. Which diagram BEST illustrates what the volumes should look like after osmosis occurs? a. figure c b. figure a c. figure d d. figure e e. figure b | back 30 a. figure c |
front 31 Which of the following changes increases the rate of a reaction? a. adding a catalyst b. decreasing concentration c. removing product as it is formed d. decreasing temperature e. all of the above increase the rate of a reaction | back 31 a. adding a catalyst |
front 32 A cation has _____________ electrons and is _____________ charged. a. gained; positively b. lost; positively c. the same number of protons; not d. gained; negatively e. lost; negatively | back 32 b. lost; positively |
front 33 Metabolism is a. the tendency to gain or lose weight b. the process by which fat is stored or burned c. the citric acid cycle d. the breakdown of food e. all catabolic and anabolic pathways in the body | back 33 e. all catabolic and anabolic pathways in the body |
front 34 Electronegativity is a measure if an atom's ability to a. ionize b. accept an electron from a metal c. draw electrons to itself in a covalent bond d. donate an electron to a nonmetal e. become and anion | back 34 c. draw electrons to itself in a covalent bond |
front 35 What buffer system is the primary buffering system in the blood? a. DNA and RNA b. H2CO3/HCO3 - c. proteins d. H2PO4 -/HPO4 2- | back 35 b. H2CO3/HCO3 - |
front 36 ![]() The arrow is pointing to a(n) a. triple bond b. single bond c. valence shell d. double bond e. electron 3 | back 36 b. single bond |
front 37 The reaction between acetic acid and water is given below, followed by a list of changes that could be made to the reaction solution. Which change will result in the equilibrium shifting to the left? CH3COOH + H2O ⟷⟷ CH3COO– + H3O+
Changes that could be made to the solution a. only IV will result in the equilibrium shifting to the left b. only I will result in the equilibrium shifting to the left c. I and III will result in the equilibrium shifting to the left d. II and IV will result in the equilibrium shifting to the left e. all of these changes will result in the equilibrium shifting to the left | back 37 d. II and IV will result in the equilibrium shifting to the left |
front 38 A hydrogen atom without an electron is referred to as a. a proton b. an acid c. hydronium d. hydroxide | back 38 a. a proton |
front 39 How do strong and weak acids differ? a. strong acids ionize completely in aqueous solution and weak acids don't b. only strong acids produce hydronium in aqueous solutions c. strong acids increase the concentration of OH- in solution d. strong acids donate protons and weak acids do not | back 39 a. strong acids ionize completely in aqueous solution and weak acids don't |
front 40 ![]() What is the strongest type of molecular interaction attracting molecules of propane together? a. dipole-dipole forces b. hydrogen bonding forces c. dispersion forces d. covalent bonding e. ionic bonding | back 40 c. dispersion forces |
front 41 ![]() Each of the following figures represents a reaction. Which reaction(s) has/have the slowest rate? a. a, b, c, d, and e b. a and b c. b and e d. all but d e. b only | back 41 d. all but d |
front 42 ![]() Chloroform (CHCl3) is an anesthetic and is also used in synthesis of ozone-damaging refrigerants called CFCs. What is the correct Lewis dot structure for chloroform? a. structure c b. structure a c. structure e d. structure b e. structure d | back 42 b. structure a |
front 43 ![]() Which of the following structures is a branched-chain hydrocarbon? a. II only b. II and III c. I and II d. III only e. I only | back 43 a. II only |
front 44 Which of the following interactions is the strongest? a. dipole-dipole forces b. dispersion forces c. covenant bond d. hydrogen bonding forces e. all of the above interactions have the same strength | back 44 c. covalent bond |
front 45 What is the chemical formula of the compound formed by sodium and oxygen? a. Na2O3 b. NaO2 c. Na3O2 d. Na2O e. NaO | back 45 d. Na2O |
front 46 Electrons shared between two atoms is a(n) _________________. a. covalent bond b. cation c. ionic bond d. salt e. anion | back 46 a. covalent bond |
front 47 ![]() Below is an illustration of an atom of fluorine. Which arrow points to the part of the atom involved in bonding? a. B b. A c. both B and C point to the correct part of the atom d. none of the above is involved in binding e. C | back 47 e. C |
front 48 What is the ration of ions in Li2O? a. 2 Li : 1 O b. 4 O : 5 Li c. 4 Li : 5 O d. 1 Li : 1 O e. 2 O : 1 Li | back 48 a. 2 Li : 1 O |
front 49 ![]() What is meant by the following symbols? a. This means the the oxygen has donated an electron to the hydrogen b. These are not symbols used in chemistry c. This means that the oxygen is pulling electrons towards itself and is partially negative d. This means that the hydrogen has donated an electron to the oxygen e. This means that the hydrogen is pulling electrons toward itself and is partially positive | back 49 c. This means that the oxygen is pulling electrons towards itself and is partially negative |
front 50 ![]() Each circle is a sample of an aqueous acidic or basic solution. Which solution contains a strong acid? a. figure c b. figure b c. figure d d. figure a e. figure e | back 50 b. figure b |