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PSc Chemistry Past Exam Questions NC

Quiz by Douglas Goodfellow

HS Physical Science
Science
North Carolina Standard Course of Study

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28 questions
Show answers
  • Q1
    A child fills a bucket with salt water and sand. How are the contents of the bucket classified?
    a compound
    a homogeneous mixture
    a solution
    a heterogeneous mixture
    30s
    PSc.2.1.1
  • Q2
    How are the processes of melting and freezing similar?
    They are both processes that physically change a substance.
    They are both processes where heat is released by a substance
    They are both processes where heat is absorbed by a substance.
    They are both processes that chemically change a substance.
    30s
    PSc.2.1.2
  • Q3
    Which element is classified as a metal?
    antimony(Sb)
    boron(B)
    cadmium(Cd)
    phosphorus(P)
    30s
    PSc.2.1.1
  • Q4
    Four different liquids will be separately poured into a single beaker. The liquids are ethanol, milk, oil, and water. The density for each liquid at room temperature is listed in the table below. How will the liquids be arranged from bottom to top in the beaker?
    Question Image
    water, milk, oil, ethanol
    water, oil, ethanol, milk
    milk, water, oil, ethanol
    milk, water, ethanol, oil
    30s
    PSc.2.1.3
  • Q5
    The diagram below is the Bohr model of an atom. Which best describes this atom?
    Question Image
    It has 6 electrons.
    It has a full outermost energy level
    It has a positive charge.
    It has 6 valence electrons
    30s
    PSc.2.1.4
  • Q6
    How does a piece of paper’s ability to be folded in half compare to its ability to burn?
    Its ability to be folded is a physical property, while its ability to burn is a chemical property.
    Its ability to be folded is a chemical property, while its ability to burn is a physical property.
    Both are chemical properties of the piece of paper.
    Both are physical properties of the piece of paper.
    30s
    PSc.2.1.3
  • Q7
    How many valence electrons are in a neutral atom of nitrogen (N)?
    15
    2
    3
    5
    30s
    PSc.2.2.1
  • Q8
    Electrons are being shared between atoms in a certain compound. Which elements could most likely form this compound?
    aluminum (Al) and iodine (I)
    sulfur (S) and oxygen (O)
    lithium (Li) and fluorine (F)
    iron (Fe) and chlorine (Cl)
    30s
    PSc.2.2.2
  • Q9
    What is the chemical formula for magnesium acetate?
    Mg(C2H3O2)2
    MgC4H6O4
    Mg2(C2H3O2)2
    Mg2C4H6O4
    30s
    PSc.2.2.3
  • Q10
    Which represents a balanced chemical equation?
    CH4 + 2O2 → CO2 + 2H2O
    CO2 + H2O → CH4 + O2
    CO2 + 2H2O → 2CH4 + 2O2
    CH4 + O2 → CO2 + H2O
    30s
    PSc.2.2.4
  • Q11
    What type of chemical reaction occurs when beryllium (Be) combines with oxygen (O2) to form beryllium oxide (BeO)?
    single replacement
    decomposition
    double replacement
    synthesis
    30s
    PSc.2.2.5
  • Q12
    Which equation represents a neutralization reaction?
    acid + base → water + salt
    acid + water → salt + base
    water + base → salt + acid
    acid + salt → base + water
    30s
    PSc.2.2.6
  • Q13
    Which of these elements is the most chemically reactive?
    strontium(Sr)
    radium(Ra)
    calcium(Ca)
    beryllium(Be)
    30s
    PSc.2.2.1
  • Q14
    Which compound contains ionic bonds?
    Ca3N2
    PCl5
    C2H6
    SF2
    30s
    PSc.2.2.2
  • Q15
    This unbalanced equation represents a chemical reaction: Pb(NO3)2 + NaI → NaNO3 + PbI2 What is the coefficient for NaI once the equation is balanced?
    3
    4
    2
    1
    30s
    PSc.2.2.4

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