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General Chemistry 1-First Periodical Examination-Q1

Quiz by Evangeline D. Tala

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50 questions
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  • Q1
    Antoine Lavoisier, the French scientist credited with first stating the law of conservation of matter, heated a mixture of tin and air in a sealed flask to produce tin oxide. What happened to the mass of the sealed flask and contents after the heating? I. The mass increased II. The mass decreased III. The mass remained the same
    II
    I & III
    III
    I
    40s
  • Q2
    All of the following are physical properties of table sugar (sucrose) EXCEPT ____.
    breaks down into carbon and water vapor when heated
    forms solid crystals at room temperature
    tastes sweet
    appears as crystals white in color
    35s
  • Q3
    Which is the most suitable separation method can be used to separate a mixture of different colored ink?
    distillation
    filtration
    chromatography
    evaporation
    35s
  • Q4
    Which process is a chemical change?
    slicing into two pieces
    dissolving in alcohol
    heating to boiling
    burning in air
    35s
  • Q5
    What type of chemical formula is illustrated?
    Question Image
    condensed formula
    molecular formula
    empirical formula
    structural formula
    35s
  • Q6
    Which of the following is the correct order of getting salt from the mixture of sand and salt?
    Filtration – evaporation – dissolving in water
    Evaporation-filtration – dissolving in water
    Filtration-dissolving in water – evaporation
    Dissolving in water – filtration-evaporation
    35s
  • Q7
    Which of the following property could NOT be used to distinguish table salt and table sugar?
    boiling point
    color
    Melting point
    density
    35s
  • Q8
    Which of the following describes how decantation is applied BEST?
    Solid-liquid or liquid-liquid heterogeneous mixtures
    Solid-liquid homogeneous mixtures
    Liquid-liquid homogeneous mixtures
    Solid-solid heterogeneous mixtures
    40s
  • Q9
    Which group has a member that does not belong?
    Mg, Ca, Li, Sr
    C, Ne, O, N
    N³⁻, H⁻, I⁻, O²⁻
    F, Cl, Br, I
    45s
  • Q10
    Isotopes of a given element contain
    Same number of neutrons and protons
    Same number of neutrons but different number of protons
    Same number of protons but a different number of electrons
    Same number of protons but a different number of neutrons
    35s
  • Q11
    Which of the following is the CORRECT formula of copper (II) nitrate?
    Cu(NO₃)₂
    Cu₂NO₃
    Cu₂(NO₃)₂
    CuNO₃
    50s
  • Q12
    Which of the following is NOT an isotope of Hydrogen?
    Tritium
    Deuterium
    Protium
    Proterium
    30s
  • Q13
    Which of the following formula refers to the symbols of the atoms that make up the molecules?
    Chemical Formula
    Molecular Formula
    Empirical Formula
    Formula Mass
    35s
  • Q14
    Which of the following is the chemical name of NH₄⁺ ?
    Ammonia
    Ammonium
    Nitrogen tetrahydride
    Nitrogen (IV) hydride
    35s
  • Q15
    Which of the following compounds is ionic?
    KCl
    HF
    CO₂
    CO
    40s

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