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Physical Setting / Chemistry - New York Regents June 2013 Exam

   Directions (1–30): For each statement or question, record on your separate answer sheet the number of the
word or expression that, of those given, best completes the statement or answers the question. Some questions
may require the use of the 2011 Edition Reference Tables for Physical Setting/Chemistry.

Formats Worksheet / Test Paper Quiz Review
: Multiple choice

Your Performance  

1.

1 According to the wave-mechanical model of the
  atom, an orbital is a region of the most probable
  location of
  (1) an alpha particle      (3) an electron
  (2) a gamma ray            (4) a proton

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2.

2 Which particles have approximately the same
  mass?
  (1) an electron and an alpha particle
  (2) an electron and a proton
  (3) a neutron and an alpha particle
  (4) a neutron and a proton

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3.

3 During a flame test, a lithium salt produces a
  characteristic red flame. This red color is produced
  when electrons in excited lithium atoms
  (1) are lost by the atoms
  (2) are gained by the atoms
  (3) return to lower energy states within the atoms
  (4) move to higher energy states within the atoms

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4.

4 Compared to the energy and charge of the
  electrons in the first shell of a Be atom, the
  electrons in the second shell of this atom have
  (1) less energy and the same charge
  (2) less energy and a different charge
  (3) more energy and the same charge
  (4) more energy and a different charge

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5.

5 Which quantity can vary among atoms of the
  same element?
  (1) mass number
  (2) atomic number
  (3) number of protons
  (4) number of electrons

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6.

6 Which substances have atoms of the same
  element but different molecular structures?
  (1) He(g) and Ne(g)     (3) K(s) and Na(s)
  (2) O2(g) and O3(g)     (4) P4(s) and S8(s)

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7.

7 An atom that has 13 protons and 15 neutrons is
  an isotope of the element
  (1) nickel               (3) aluminum
  (2) silicon              (4) phosphorus

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8.

8 Which elements have the most similar chemical
  properties?
  (1) Si, As, and Te     (3) Mg, Sr, and Ba
  (2) N2, O2, and F2     (4) Ca, Cs, and Cu

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9.

9 Which list includes three types of chemical
  formulas for organic compounds?
  (1) covalent, metallic, isotopic
  (2) covalent, metallic, molecular
  (3) empirical, structural, isotopic
  (4) empirical, structural, molecular

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10.

10 In a bond between an atom of carbon and an
   atom of fluorine, the fluorine atom has a
   (1) weaker attraction for electrons
   (2) stronger attraction for electrons
   (3) smaller number of first-shell electrons
   (4) larger number of first-shell electrons

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11.

11 A sample of CO2(s) and a sample of CO2(g)
   differ in their
   (1) chemical compositions
   (2) empirical formulas
   (3) molecular structures
   (4) physical properties

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12.

12 Which statement defines the temperature of a
   sample of matter?
   (1) Temperature is a measure of the total
       electromagnetic energy of the particles.
   (2) Temperature is a measure of the total
       thermal energy of the particles.
   (3) Temperature is a measure of the average
       potential energy of the particles.
   (4) Temperature is a measure of the average
       kinetic energy of the particles.

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13.

13 For a chemical reaction, the difference between
   the potential energy of the products and the
   potential energy of the reactants is equal to the
   (1) heat of fusion
   (2) heat of reaction
   (3) activation energy of the forward reaction
   (4) activation energy of the reverse reaction

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14.

14 Which equation represents sublimation?
   (1) Hg(ℓ) → Hg(s)      (3) NH3(g) → NH3(ℓ)
   (2) H2O(s) → H2O(g)     (4) CH4(ℓ) → CH4(g)

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15.

15 Which statement describes the particles of an
   ideal gas, based on the kinetic molecular theory?
   (1) The motion of the gas particles is orderly
       and circular.
   (2) The gas particles have no attractive forces
       between them.
   (3) The gas particles are larger than the dis-
       tances separating them.
   (4) As the gas particles collide, the total energy
       of the system decreases.

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16.

16 Two grams of potassium chloride are completely
   dissolved in a sample of water in a beaker. This
   solution is classified as
   (1) an element
   (2) a compound
   (3) a homogeneous mixture
   (4) a heterogeneous mixture

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17.

17 Which compound has the strongest hydrogen
   bonding between its molecules?
   (1) HBr                (3) HF
   (2) HCl                (4) HI

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18.

18 Powdered sulfur is yellow, and powdered iron is
   gray. When powdered sulfur and powdered iron
   are mixed at 20°C, the powdered iron
   (1) becomes yellow       (3) remains ionic
   (2) becomes a liquid     (4) remains magnetic

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19.

19 An effective collision between reactant particles
   requires the particles to have the proper
   (1) charge and mass
   (2) charge and orientation
   (3) energy and mass
   (4) energy and orientation

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20.

20 Which term is defined as a measure of the
   disorder of a system?
   (1) heat              (3) kinetic energy
   (2) entropy           (4) activation energy

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21.

21 Which process is used to determine the concen-
   tration of an acid?
   (1) chromatography       (3) electrolysis
   (2) distillation         (4) titration

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22.

22 The compounds CH3OCH3 and CH3CH2OH
   have different functional groups. Therefore, these
   compounds have different
   (1) chemical properties
   (2) gram-formula masses
   (3) percent compositions by mass
   (4) numbers of atoms per molecule

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23.

23 Which term identifies the half-reaction that
   occurs at the anode of an operating electro-
   chemical cell?
   (1) oxidation          (3)   neutralization
   (2) reduction          (4)   transmutation

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24.

24 During the operation of a voltaic cell, the cell
   produces
   (1) electrical energy spontaneously
   (2) chemical energy spontaneously
   (3) electrical energy nonspontaneously
   (4) chemical energy nonspontaneously

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25.

25 In which type of chemical reaction are electrons
   transferred?
   (1) organic addition
   (2) oxidation-reduction
   (3) double replacement
   (4) acid-base neutralization

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26.

26 A substance that dissolves in water and produces
   hydronium ions as the only positive ions in the
   solution is classified as
   (1) an alcohol            (3) a base
   (2) an acid               (4) a salt

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27.

27 According to one acid-base theory, a base is an
   (1) H+ acceptor         (3) Na+ acceptor
   (2) H+ donor            (4) Na+ donor

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28.

28 Which compound is an electrolyte?
   (1) CCl4              (3) C6H12O6
   (2) CH3OH             (4) Ca(OH)2

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29.

29 Which term identifies a type of nuclear reaction?
   (1) fermentation          (3) reduction
   (2) deposition            (4) fission

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30.

30 Which radioisotopes have the same decay mode
   and have half-lives greater than 1 hour?
   (1) Au-198 and N-16       (3) I-131 and P-32
   (2) Ca-37 and Fe-53       (4) Tc-99 and U-233

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