NSCI 6103A CHEMISTRY MIDTERM EXAM FIRST ATTEMPT | 2022 update 97% correct

Home / My courses / UGRD-NSCI6103A-2013T / Week 8: Midterm Examination / Midterm Exam Question 1 Not yet answered Marked out of 1.00 Question 2 Not yet answered Marked out of 1.00 Question 3 Not yet answered Marked out of 1.00 Question 4 Not yet answered Marked out of 1.00 Question 5 Not yet answered Marked out of 1.00 Molecules in gases, under normal conditions, is observed to: Select one: a. Have no great interaction between them b. Exert great attractive forces together c. Repel each other d. All of the choices Clear my choice Which of the following quantum numbers describes the orientation of the orbitals? Select one: a. Magnetic quantum number b. Angular momentum quantum number c. Principal quantum number Clear my choice What factor affect electronegativity? Select one: a. Ionization energy b. Distance between nuclei c. Electron affinity and Ionization energy d. Electron affinity Clear my choice Why can't we write Lewis structures for lanthanides, actinides, and transition metals? Select one: a. All of the choices b. Because of their incompletely filled inner shells c. None of the choices d. Because of the number of electrons not equal to eight Clear my choice What can affect the viscosity of a certain liquid? Select one: a. Number of electrons b. Temperature c. Distance between molecules d. None of the choices Clear my choice  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 6 Not yet answered Marked out of 1.00 Question 7 Not yet answered Marked out of 1.00 Question 8 Not yet answered Marked out of 1.00 Question 9 Not yet answered Marked out of 1.00 Question 10 Not yet answered Marked out of 1.00 Question 11 Not yet answered Marked out of 1.00 A homogeneous catalysis occurs using a catalyst that has a different phase as the reacting molecules while a heterogeneous catalysis occurs when a catalyst has the same phase as the reactants. Select one: True False Direction : Identify if the following elements are metal, non-metal or metalloids: Germanium Select one: a. Non-metal b. Metalloids c. Metal Clear my choice Hydrogenation of ethylene to ethane using Palladium as a catalyst is considered a heterogeneous catalysis. C H + H - C H Select one: True False Pd 2 2 (g) 2(g) 2 4 (g) Valence electrons are also known as the innermost electrons. Select one: True False We cannot write Lewis symbols for what group of elements? Select one: a. Actinides b. Transition metals c. Lanthanides d. All of the choices Clear my choice Chemical equilibrium is the state at which the free energy of the reaction is at its highest possible value. Select one: True False  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 12 Not yet answered Marked out of 1.00 Question 13 Not yet answered Marked out of 1.00 Question 14 Not yet answered Marked out of 1.00 Question 15 Not yet answered Marked out of 1.00 Question 16 Not yet answered Marked out of 1.00 Question 17 Not yet answered Marked out of 1.00 Which theory states that the farther away the electron is from the nucleus, the higher the excited state is? Select one: a. Bohr's theory of the hydrogen atom b. Photoelectric Effect c. Heisenberg Uncertainty Principle d. Aufbau Principle Clear my choice What is the collective term for forces that attracts molecules together? Select one: a. Dipole interaction b. Dispersion forces c. Intermolecular forces d. Intramolecular forces Clear my choice The Brownian Model explains how the temperature affects the rate constants of a chemical reaction: Select one: True False Which of the following affects the amount of lattice energy needed in breaking an anion bond? Select one: a. Product of charges of the two ions b. Product of charges of the two ions and Distance between two atoms c. Distance between two atoms d. Number of protons Clear my choice Which of the following intermolecular forces are observed in polar molecules? Select one: a. Dipole-dipole forces and Ion-dipole forces b. Dispersion forces c. Dipole-dipole forces d. Ion-dipole forces Clear my choice The freezing-point temperature of a solution is lower as compared to its pure solvent. Select one: True False  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 18 Not yet answered Marked out of 1.00 Question 19 Not yet answered Marked out of 1.00 Question 20 Not yet answered Marked out of 1.00 Question 21 Not yet answered Marked out of 1.00 Question 22 Not yet answered Marked out of 1.00 Question 23 Not yet answered Marked out of 1.00 Question 24 Not yet answered Marked out of 1.00 Changes in concentration, temperature, pressure, and time are important factors to consider in chemical equilibrium. Select one: True False Which of the following is not a type of solution? Select one: a. Supersaturated solution b. Hypersaturated solution c. Saturated solution d. Unsaturated solution Clear my choice Supersaturated solutions contain more than the maximum amount of solvent in a solution. Select one: True False The electron configuration influences the properties of the elements. Select one: True False Direction : Identify if the following elements are metal, non-metal or metalloids: Bismuth Select one: a. Non-metal b. Metalloids c. Metal Clear my choice Valence electrons are also known as the innermost electrons. Select one: True False The lack of molecules above the surface of liquids causes them to tighten and form an elastic-like film. Select one: True False  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 25 Not yet answered Marked out of 1.00 Question 26 Not yet answered Marked out of 1.00 Question 28 Not yet answered Marked out of 1.00 Question 29 Not yet answered Marked out of 1.00 Question 30 Not yet answered Marked out of 1.00 Question 27 Not yet answered Marked out of 1.00 Solubilities of solids and gases affect differently with temperature. Select one: True False During a chemical equilibrium, concentrations of products and reactants no longer have apparent change. Select one: True False The differential rate law expresses how the reaction depends on concentration while integrated rate law expresses how concentration depends on temperature. Select one: True False For the given reaction mechanism, NO is one of the final products. NO + NO - NO + NO NO + CO - NO + CO Select one: True False 3 k1 2(g) 2(g) 3(g) (g) k2 3(g) (g) 2 g) ( 2(g) Direction : Identify if the following elements are metal, non-metal or metalloids: Tellurium Select one: a. Metalloids b. Non-metal c. Metal Clear my choice This is a type of bond observed with two atoms sharing a pair of electrons. Select one: a. All of the choices b. None of the choices c. Ionic bond d. Covalent bond Clear my choice  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 31 Not yet answered Marked out of 1.00 Question 32 Not yet answered Marked out of 1.00 Question 33 Not yet answered Marked out of 1.00 Question 34 Not yet answered Marked out of 1.00 Question 35 Not yet answered Marked out of 1.00 Question 36 Not yet answered Marked out of 1.00 This type of bond happens when an electron from an atom transfers to another atom, forming ions and creating electrostatic attraction: Select one: a. All of the choices are correct b. Covalent bond c. None of the choices d. Ionic bond Clear my choice Concentration of reactants is reduced over the course of reaction. Select one: True False What is the energy required to completely break a mole of solid ionic compound into its individual gaseous ions? Select one: a. Lattice energy b. None of the choices c. Bond enthalpy d. Bond dissociation energy Clear my choice What factor affects the polarizability of a certain nonpolar molecule? Select one: a. The number of electrons in the cloud b. How dispersed are the electrons surrounding the molecule c. All of the choices d. The molar mass of the molecule Clear my choice The energy of a single photon is described as E = hv Select one: True False Chemical equilibrium is the state in which there is no apparent change in the products and reactants over time, and the free energy of the reaction is at its lowest. Select one: True False  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 37 Not yet answered Marked out of 1.00 Question 38 Not yet answered Marked out of 1.00 Question 39 Not yet answered Marked out of 1.00 Question 40 Not yet answered Marked out of 1.00 Question 41 Not yet answered Marked out of 1.00 Question 42 Not yet answered Marked out of 1.00 Increasing the temperature also speeds up the reaction, hence, increasing the rate constants Select one: True False Which of the following rules is not true with regards to assigning maximum number of electrons to orbitals (given n)? Select one: a. The principal quantum number (n) also dictates the number of subshells (two values of l) b. Both of the statements are correct c. The number of orbitals is determined by the angular quantum number (l), computed as 2l + 1. d. No correct answer Clear my choice Henry Moseley proposed the law of octaves in which he explains that the atomic masses of the elements when arranged in ascending order, elements falling in every eight position were deemed to have the same properties. Select one: True False The boiling-point temperature of a solution is higher than its pure solvent. Select one: True False Which of the following does not affect chemical equilibrium? Select one: a. Time b. Temperature c. Pressure d. Concentration Clear my choice How does temperature affect rate constants? Select one: a. Increasing the temperature also speeds up the reaction, hence, decreasing the rate constants. b. Increasing the temperature also speeds up the reaction, hence, increasing the rate constants. c. Increasing the temperature also slows up the reaction, hence, decreasing the rate constants. d. Increasing the temperature also slows up the reaction, hence, increasing the rate constants. Clear my choice  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 43 Not yet answered Marked out of 1.00 Question 44 Not yet answered Marked out of 1.00 Question 45 Not yet answered Marked out of 1.00 Question 46 Not yet answered Marked out of 1.00 Question 47 Not yet answered Marked out of 1.00 Question 48 Not yet answered Marked out of 1.00 What theory explains that when certain metals are exposed to light of at least a certain minimum frequency, electrons are ejected from its surface. Select one: a. Photoelectric Effect b. Heisenberg Uncertainty Principle c. Bohr's theory of the hydrogen atom d. Aufbau Principle Clear my choice In order for a given exothermic chemical reaction to proceed, heat must be supplied for the molecules to collide. Select one: True False Due to little space in between molecules, solids and liquids lack shapes and volume. Select one: True False The stronger the intermolecular forces, the higher the surface tension. Select one: True False The direction of the reaction favored when stress is applied is towards the direction where the stress is lessened. Select one: True False Which of the following describes the relation between reactant concentration and time in the following equation? Select one: a. PCl and Cl decrease over time. b. PCl decrease over time. c. PCl increase over time. d. PCl and Cl increase over time. Clear my choice 3 2 5 5 3 2  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Question 49 Not yet answered Marked out of 1.00 Question 50 Not yet answered Marked out of 1.00 Water flow easier than honey because of its higher viscosity. Select one: True False Energy levels of orbitals determine the actual arrangement of electrons in atoms. Electrons will fill first the most stable orbitals. Select one: True False ◄ Midterm Quiz 2 Jump to... Lesson 7: Kinetics and Chemical Equilibrium ►  This study source was downloaded by from CourseH on :05:17 GMT -06:00 Powered by TCPDF ()