Archives
Chemical Engineering Chapter 1 1 A scientist made careful measurements of the pressure and temperature of many different gases. Based on these measurements, he concluded that
Chapter 1: Keys to the Study of Chemistry 1. Which one of the following is a “substance” in the sense of the word as used in your textbook? A) air B) tap water C) sea water D) water E) toothpaste […]
Chemical Engineering Chapter 10 1 The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds
Chapter 10: The Shapes of Molecules 1. In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen? A) 5 and 6 B) 4 and 2 C) 3 and 6 D) 4 and 6 E) […]
Chemical Engineering Chapter 10 2 Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90° bond angle in it
Chapter 10: The Shapes of Molecules 41. How many faces and how many vertexes (corners), respectively, are there in a trigonal bipyramid? A) 4 and 4 B) 5 and 5 C) 5 and 6 D) 6 and 5 E) 6 […]
Chemical Engineering Chapter 11 1 Explain what is meant by the term “bond order” and describe how it can be calculated using the information in a molecular orbital energy level diagram
Chapter 11: Theories of Covalent Bonding 1. According to valence bond theory, which orbitals on N and H overlap in the NH3 molecule? A) 2p on N overlaps with 2s on H D) sp3 on N overlaps with sp on […]
Chemical Engineering Chapter 12 1 Which one of the following quantities is generally not obtainable from a single heating or cooling curve of a substance, measured at atmospheric pressure
Chapter 12: Intermolecular Forces: Liquids, Solids, and Phase Changes 1. Pentane, C5H12, boils at 35°C. Which of the following is true about kinetic energy, Ek, and potential energy, Ep, when liquid pentane at 35°C is compared with pentane vapor at […]
Chemical Engineering Chapter 12 2 Which of the following statements concerning a face-centered cubic unit cell and the corresponding lattice, made up of identical atoms, is incorrect
Chapter 12: Intermolecular Forces: Liquids, Solids, and Phase Changes 51. When identical particles pack in a simple cubic lattice, there is/are ____ particle(s) per unit cell. A) 1 B) 2 C) 3 D) 4 E) 8 Ans: A Difficulty: M […]
Chemical Engineering Chapter 13 1 Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed
Chapter 13: The Properties of Mixtures: Solutions and Colloids 1. Select the type of interaction which best describes the attraction between Mg2+ ions and water molecules. A) dipole-dipole D) ion-induced dipole B) dipole-induced dipole E) ion-hydrogen bond C) ion-dipole Ans: […]
Chemical Engineering Chapter 14 1 Although the periodic table is organized according to the atomic numbers of the elements, chemists are more interested in the arrangement of the electrons
Chapter 14: Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity 1. Although the periodic table is organized according to the atomic numbers of the elements, chemists are more interested in the arrangement of the electrons for their […]
Chemical Engineering Chapter 15 1 Benzene will react with chloromethane in the presence of a catalyst to produce toluene and hydrogen chloride. Select the correct reaction type for the process
Chapter 15: Organic Compounds and the Atomic Properties of Carbon 1. Select the correct name for the following compound. A) 1,1,3-triethyl-2-methylbutane D) 3-ethyl-4,5-dimethylheptane B) 1,1-diethyl-2,3-dimethylpentane E) none of the above C) 2,4-diethyl-3-methylhexane Ans: D Difficulty: E 2. Select the correct […]
Chemical Engineering Chapter 15 2 One characteristic of the monomers that form condensation polymers that is not common in monomers which form addition polymers is
Chapter 15: Organic Compounds and the Atomic Properties of Carbon 61. Amygdalin (Laetrile) was once touted for its potential anticancer activity. However, the claims were never scientifically verified. Identify the functional group circled. A) carbonite B) ether C) amide D) […]
Chemical Engineering Chapter 16 1 The kinetics of the decomposition of dinitrogen pent a oxide is studied at 50°C and at 75°C. Which of the following statements concerning the studies is correct
Chapter 16: Kinetics: Rates and Mechanisms of Chemical Reactions 1. The compound RX3 decomposes according to the equation 3RX3 → R + R2X3 + 3X2 In an experiment the following data were collected for the decomposition at 100°C. What is […]
Chemical Engineering Chapter 16 2 Briefly describe the experimental measurements you would make and how you would obtain the activation energy from a suitable linear plot of the experimental data
Chapter 16: Kinetics: Rates and Mechanisms of Chemical Reactions 53. Consider the following mechanism for the oxidation of bromide ions by hydrogen peroxide in aqueous acid solution. H+ + H2O2 H2O+–OH (rapid equilibrium) H2O+–OH + Br– → HOBr + H2O […]
Chemical Engineering Chapter 17 1 If the number of moles of reactants in the reaction equation is equal to that of the products, which of the following statements is definitely true
Chapter 17: Equilibrium: The Extent of Chemical Reactions 1. An equilibrium is established in which both the forward (fwd) and the reverse (rev) reactions are elementary. If the equilibrium constant Kc = 1.6 × 10-2 and the rate constant kfwd […]
Chemical Engineering Chapter 17 2 Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions
Chapter 17: Equilibrium: The Extent of Chemical Reactions 48. At high temperatures, carbon reacts with O2 to produce CO as follows: C(s) + O2(g) 2CO(g). When 0.350 mol of O2 and excess carbon were placed in a 5.00-L container and […]
Chemical Engineering Chapter 18 1 Picric acid has been used in the leather industry and in etching copper. However, its laboratory use has been restricted because it dehydrates
Chapter 18: Acid-Base Equilibria 1. The substance H2SO3 is considered A) a weak Arrhenius base. D) a neutral compound. B) a strong Arrhenius acid. E) a weak Arrhenius acid. C) a strong Arrhenius base. Ans: A Difficulty: M 2. The […]
Chemical Engineering Chapter 19 1 Which one of the following is the best representation of the titration curve which will be obtained in the titration of a weak base
Chapter 19: Ionic Equilibria in Aqueous Systems 1. Which of the following aqueous mixtures would be a buffer system? A) HCl, NaCl D) H2SO4, CH3COOH B) HNO3, NaNO3 E) NH3, NaOH C) H3PO4, H2PO4– Ans: C Difficulty: E 2. Which, […]
Chemical Engineering Chapter 19 2 Use the following information to calculate the solubility product constant, Ksp, for PbCl2. A saturated solution of PbCl2 in water was prepared and filtered.
Chapter 19: Ionic Equilibria in Aqueous Systems 63. A 20.0-mL sample of 0.50 M H2C6H6O6 (ascorbic acid, a diprotic acid) was titrated with 0.50 M NaOH. The following data were gathered during the titration. mL NaOH added 10.00 20.00 30.00 […]
Chemical Engineering Chapter 2 1 Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula
Chapter 2: The Components of Matter 1. Kaolinite, a clay mineral with the formula Al4Si4O10(OH)8, is used as a filler in slick- paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains […]
Chemical Engineering Chapter 20 1 Which of the following conditions will ensure that a chemical reaction will definitely proceed in the forward direction, toward products
Chapter 20: Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions 1. Which of the following is true for pure oxygen gas, O2(g) at 25°C? A) H° f > 0 B) H° f < 0 C) G° f > […]
Chemical Engineering Chapter 20 2 Is a spontaneous process necessarily a rapid one? Explain, and provide a real reaction as an example to illustrate your answer.
Chapter 20: Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions 55. “A diamond is forever” is one of the most successful advertising slogans of all time. But is it true? For the reaction shown below, calculate the standard […]
Chemical Engineering Chapter 21 1 The redox reaction of per oxy disulfate with iodide has been used for many years as part of the iodine clock reaction which introduces students to kinetics
Chapter 21: Electrochemistry: Chemical Change and Electrical Work 1. Which one of the following is not a redox reaction? A) Al(OH)4–(aq) + 4H+(aq) → Al3+(aq) + 4H2O(l) B) C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l) C) Na6FeCl8(s) + 2Na(l) → […]
Chemical Engineering Chapter 22 1 Nitrogen fixation occurs through atmospheric, industrial, and biological processes. Which of these fixes the most nitrogen
Chapter 22: The Elements in Nature and Industry 1. The Earth’s core consists mainly of A) Ni. B) O. C) Al. D) Si. E) Fe. Ans: E Difficulty: E 2. The main effect of the biosphere on the chemistry of […]
Chemical Engineering Chapter 23 1 A feature of transition metal chemistry is that these elements exhibit multiple oxidation states. Which one of the following elements exhibits the smallest number of
Page 403 Chapter 23: The Transition Elements and Their Coordination Compounds 1. Which of the following elements has the ground state electron configuration, [Xe]4f145d106s1? A) Hg B) Ag C) Hf D) Au E) Th 2. Which one of the following […]
Chemical Engineering Chapter 24 1 In the equation above, what particle or type of radiation needs to be included on the right hand side in order to balance it
Page 417 Chapter 24: Nuclear Reactions and Their Applications 1. Who discovered radioactivity? A) Geiger B) Curie C) Roentgen D) Becquerel E) Rutherford 2. Which one of the following is an incorrect representation of the indicated particle or nucleus? A) […]
Chemical Engineering Chapter 3 1 Lead (II) nitrate is a poisonous substance which has been used in the manufacture of special explosives and as a sensitizer in photography. Calculate the mass of lead in
Chapter 3: Stoichiometry of Formulas and Equations 1. Calcium fluoride, CaF2, is a source of fluorine and is used to fluoridate drinking water. Calculate its molar mass. A) 118.15 g/mol D) 59.08 g/mol B) 99.15 g/mol E) 50.01 g/mol C) […]
Chemical Engineering Chapter 4 1 Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in
Chapter 4: The Major Classes of Chemical Reactions 1. A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute […]
Chemical Engineering Chapter 5 1 Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral
Chapter 5: Gases and the Kinetic-Molecular Theory 1. A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor? A) […]
Chemical Engineering Chapter 6 1 Cold packs, whose temperatures are lowered when ammonium nitrate dissolves in water, are carried by athletic trainers when transporting ice is not possible
Chapter 6: Thermochemistry: Energy Flow and Chemical Change 1. A system that does no work but which transfers heat to the surroundings has A) q < 0, E > 0. D) q > 0, E < 0. B) q < […]
Chemical Engineering Chapter 7 1 Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom
Chapter 7: Quantum Theory and Atomic Structure 1. Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom? A) Planck B) Bohr C) Rydberg […]
Chemical Engineering Chapter 8 1 Energy states of atoms containing more than one electron arise from nucleus-electron and electron-electron interactions. Which of the following statements correctly
Chapter 8: Electron Configuration & Chemical Periodicity 1. “Each electron in an atom must have its own unique set of quantum numbers” is a statement of A) the aufbau principle. D) the periodic law. B) the Pauli exclusion principle. E) […]
Chemical Engineering Chapter 9 1 Analysis of an unknown substance showed that it has a high boiling point and is brittle. It is an insulator as a solid but conducts electricity when melted
Chapter 9: Models of Chemical Bonding 1. Which of the following contains ionic bonding? A) CO B) SrF2 C) Al D) OCl2 E) HCl Ans: B Difficulty: E 2. Which of the following is an ionic compound? A) H2S B) […]