Regents Chemistry Test Preparation Practice

    Regents Test, Full Exam Practice Online: chemistry January 2018

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54

    Base your answers to questions 55 and 56 on the information below and on your knowledge of chemistry.

    The bright-line spectra for four elements and a mixture of elements are shown in the diagram below.

    excited-states-bright-line-spectrum fig: chem12018-exam_g13.png

    55
    56

    Base your answers to questions 57 through 59 on the information below and on your knowledge of chemistry.

    Rubidium and iodine have different chemical and physical properties. Some of these properties are shown in the table below.

    identification-of-element fig: chem12018-exam_g14rd047.png

    57
    58
    59

    Base your answers to questions 60 through 62 on the information below and on your knowledge of chemistry.

    Given the unbalanced equation showing the reactants and product of a reaction occurring at 298 K and 100. kPa:

    P4(s) + Cl2(g) → PCl3(ℓ) + energy

    60
    61
    62

    Base your answers to questions 63 through 65 on the information below and on your knowledge of chemistry.

    The diagram below shows the first three steps in the uranium-238 radioactive decay series.

    isotopes-atomic-mass fig: chem12018-exam_g15.png

    The decay mode for the first and third steps is shown above the arrows. The decay mode for the second step is not shown in the diagram. Thorium-234 has a half-life of 24.10 days.

    63
    64
    65

    Base your answer to question 66 on the information below and on your knowledge of chemistry.

    Tetrachloroethene, C2Cl4, is a solvent used in many dry cleaning processes.

    66

    Base your answers to questions 67 through 69 on the information below and on your knowledge of chemistry.

    Thermal energy is absorbed as chemical reactions occur during the process of baking muffins. The batter for muffins often contains baking soda, NaHCO3(s), which decomposes as the muffins are baked in an oven at 200.°C. The balanced equation below represents this reaction, which releases CO2(g) and causes the muffins to rise as they bake. The H2O(ℓ) is released into the air of the oven as it becomes a vapor.

    2NaHCO3(s) + heat → Na2CO3(s) + H2O(ℓ) + CO2(g)

    67
    68
    69

    Base your answers to questions 70 through 72 on the information below and on your knowledge of chemistry.

    A bubble of air at the bottom of a lake rises to the surface of the lake. Data for the air inside the bubble at the bottom of the lake and at the surface of the lake are listed in the table below.

    significent-figures-conversions fig: chem12018-exam_g16.png

    70
    71
    72

    Base your answers to questions 73 through 77 on the information below and on your knowledge of chemistry.

    Nitrogen dioxide, NO2, is a dark brown gas that is used to make nitric acid and to bleach flour. Nitrogen dioxide has a boiling point of 294 K at 101.3 kPa. In a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, N2O4. This equilibrium is represented by the equation below.

    2NO2(g) ⇌ N2O4(g) + 58 kJ

    73
    74
    75
    76
    77

    Base your answers to questions 78 through 81 on the information below and on your knowledge of chemistry.

    A student sets up a voltaic cell using magnesium and zinc electrodes. The porous barrier in the cell has the same purpose as a salt bridge. The diagram and the ionic equation below represent this operating cell.

    chemical-reactions-and-equations fig: chem12018-exam_g17.png

    78
    79
    80
    81

    Base your answers to questions 82 through 85 on the information below and on your knowledge of chemistry.

    Polyvinyl chloride (PVC) is a polymer used to make drain pipes, flooring, electric wire insulation, and some plastic bottles. Making PVC requires several reactions. The first step is represented by the equation below.

    hydrocarbons fig: chem12018-exam_g18.png

    The 1,2-dichloroethane is converted to vinyl chloride. To produce PVC, the vinyl chloride monomer is polymerized, as represented by the equation below.

    hydrocarbons fig: chem12018-exam_g19.png

    82
    83
    84
    85