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For the given reaction mechanism, NO3 is one of the final products.

    k1

    NO2(g)    +    NO2(g) -> NO3(g)    +    NO(g)

    k2

    NO3(g)    +    CO (g) -> NO2(g)    +    CO2(g)

    Select one:

    True

    False

    2.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. No correct answer

    c. Both of the statements are correct

    d. The number of orbitals is determined by the angular quantum number (l), computed as 2l + 1.

    3.Which of the following is true about d orbitals?

    Select one:

    a. All d orbitals have 2 different shapes.

    b. All d orbitals are spherical in shape.

    c. Both of the given statements are correct

    d. No correct answer

    4.Valence electrons are also known as the innermost electrons.

    Select one:

    True

    False

    5.Which of the following affects the amount of lattice energy needed in breaking an anion bond?

    Select one:

    a. Number of protons

    b. Distance between two atoms

    c. Product of charges of the two ions and Distance between two atoms

    d. Product of charges of the two ions

    6.Direction : Identify if the following elements are metal, non-metal or metalloids:

    Oxygen

    Select one:

    a. Metal

    b. Metalloids

    c. Non-metal

    7.Concentration of reactants is reduced over the course of reaction.

    Select one:

    True

    False

    8.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

    9.Which of the following quantum numbers describes the orientation of the orbitals?

    Select one:

    a. Angular momentum quantum number

    b. Magnetic quantum number

    c. Principal quantum number

    10.We cannot write Lewis symbols for what group of elements?

    Select one:

    a. Actinides

    b. Transition metals

    c. All of the choices

    d. Lanthanides

    11.Group IA elements have the lowest ionization energies.

    Select one:

    True

    False

    12.The f-subshells of transition metals are incompletely filled.

    Select one:

    True

    False

    13.Which of the following does not affect chemical equilibrium?

    Select one:

    a. Pressure

    b. Time

    c. Temperature

    d. Concentratio1n

    14.Water flow easier than honey because of its higher viscosity.

    Select one:

    True

    False

    15.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. Aufbau Principle

    c. Photoelectric Effect

    d. Heisenberg Uncertainty Principle

    16.What is the collective term for forces that attracts molecules together?

    Select one:

    a. Intramolecular forces

    b. Dipole interaction

    c. Intermolecular forces

    d. Dispersion forces

    17.Molecules in gases, under normal conditions, is observed to:

    Select one:

    a. Exert great attractive forces together

    b. Repel each other

    c. All of the choices

    d. Have no great interaction between them

    18.What is the energy required to completely break a mole of solid ionic compound into its individual gaseous ions?

    Select one:

    a. Bond enthalpy

    b. None of the choices

    c. Bond dissociation energy

    d. Lattice energy

    19.Which of the following is not an exception to the octet rule?

    Select one:

    a. Molecules with less than an octet number of electrons

    b. Molecules with odd number of electrons

    c. Molecules with more than an octet number of electrons

    d. Molecules with eight electrons in its valence shell

    20.Supersaturated solutions contain more than the maximum amount of solvent in a solution.

    Select one:

    True

    False

    21.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

    22.The energy of a single photon is described as E = hv

    Select one:

    True

    False

    23.The stronger the intermolecular forces, the higher the surface tension.

    Select one:

    True

    False

    24.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. Aufbau Principle

    c. Bohr's theory of the hydrogen atom

    d. Heisenberg Uncertainty Principle

    25.Solubilities of solids and gases affect differently with temperature.

    Select one:

    True

    False

    26.What traits can be observed with gases, due to the large amount of space in between molecules and the lack of interaction between them?

    Select one:

    a. Gases are easily compressible

    b. None of the choices

    c. Gases have high density

    d. Gases are incompressible

    27.The boiling-point temperature of a solution is higher than its pure solvent.

    Select one:

    True

    False

    28.Effective nuclear charge is the nuclear charge felt by an electron when both the actual nuclear charge and the repulsive effects of the other electrons are taken into account.

    Select one:

    True

    False

    29.Colligative properties depend on the nature of the substances in a solution.

    Select one:

    True

    False

    30.What factor affects the polarizability of a certain nonpolar molecule?

    Select one:

    a. The molar mass of the molecule

    b. The number of electrons in the cloud

    c. How dispersed are the electrons surrounding the molecule

    d. All of the choices

    31.Chemical equilibrium is the state at which the free energy of the reaction is at its highest possible value.

    Select one:

    True

    False

    32.The lack of molecules above the surface of liquids causes them to tighten and form an elastic-like film.

    Select one:

    True

    False

    33.In order for a given exothermic chemical reaction to proceed, heat must be supplied for the molecules to collide.

    Select one:

    True

    False

    34.This is a method used to distinguish a solution from a colloid, where light is beamed in a substance and observed if it would scatter due to dispersed particles observable in a colloid:

    Select one:

    a. Crystallization

    b. Tyndall effect

    c. Effervescence

    d. Van der Waals effect

    35.Increasing the temperature also speeds up the reaction, hence, increasing the rate constants

    Select one:

    True

    False

    36.This refers toa process where molecules of a solvent pass through a semipermeable membrane:

    Select one:

    a. None of the above

    b. Osmotic pressure

    c. Osmosis

    d. Effervescence

    37.The main difference between the condensed states and the gaseous state of matter is the distance between molecules.

    Select one:

    True

    False

    38.In the following chemical reaction, what can be done to maintain the forward reaction?

    PCl3+Cl2=PCl5

    Select one:

    a. Increase concentration of PCl3

    b. Increase concentration of PCl5

    c. Decrease concentration of PCl3

    d. Decrease concentration of Cl2

    39.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

    40.The electron configuration influences the properties of the elements.

    Select one:

    True

    False

    41.Hydrogenation of ethylene to ethane using Palladium as a catalyst is considered a heterogeneous catalysis.

    Pd

    C2H2 (g)    +    H2(g) -> C2H4 (g)

    Select one:

    True

    False

    42.Why can't we write Lewis structures for lanthanides, actinides, and transition metals?

    Select one:

    a. All of the choices

    b. None of the choices

    c. Because of their incompletely filled inner shells

    d. Because of the number of electrons not equal to eight

    43.The magnetic quantum number describes the size of the orbital. It also indirectly describes the energy of an orbital.

    Select one:

    True

    False

    44.Changes in concentration, temperature, pressure, and time are important factors to consider in chemical equilibrium.

    Select one:

    True

    False

    45.During a chemical equilibrium, concentrations of products and reactants no longer have apparent change.

    Select one:

    True

    False

    46.Direction : Identify if the following elements are metal, non-metal or metalloids:

    Germanium

    Select one:

    a. Metal

    b. Metalloids

    c. Non-metal

    47.Le Chatelier's principle states that if stress (or a change in condition) is imposed on a system at equilibrium, the equilibrium position shifts to a direction that tends to lessen the stress.

    Select one:

    True

    False

    48.Which of the following describes the relation between reactant concentration and time in the following equation?

    PCl3+Cl2=PCl5

    Select one:

    a. PCl3 and Cl2 increase over time.

    b. PCl5 increase over time.

    c. PCl5 decrease over time.

    d. PCl3 and Cl2 decrease over time.

    49.What factor affect electronegativity?

    Select one:

    a. Ionization energy

    b. Electron affinity and Ionization energy

    c. Electron affinity

    d. Distance between nuclei

    50.The Brownian Model explains how the temperature affects the rate constants of a chemical reaction:

    Select one:

    True

    False

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    Subject: Chemistry, Science
    For the given reaction mechanism, NO3is one of the final products. k1 NO2(g)+NO2(g)->NO3(g)+NO(g) k2 NO3(g)+CO(g)->NO2(g)+CO2(g) Select one: True
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