Practice Quiz

MCAS Chemistry Exam Practice - Question List

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46. Which of the following samples of sugar will dissolve fastest in a pitcher of lemonade?
  1. 5 g of cubed sugar in 5°C lemonade
  2. 5 g of cubed sugar in 20°C lemonade
  3. 5 g of granulated sugar in 5°C lemonade
  4. 5 g of granulated sugar in 20°C lemonade
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47. Which of the following comparisons correctly describes subatomic particles?
  1. An electron has a negative charge and a mass larger than the mass of a proton.
  2. A neutron has a negative charge and a mass smaller than the mass of a proton.
  3. A neutron has a neutral charge and a mass larger than the mass of an electron.
  4. A proton has a positive charge and a mass smaller than the mass of an electron.
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48. One way that mixtures differ from pure substances is in the methods that can be used to separate them into their components.Which of the following is a method used to separate the components of some mixtures?
  1. a nuclear reaction
  2. a filtration process
  3. a chemical reaction
  4. an electrolysis process
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49. Which of the following describes the separation of the components of a mixture?
  1. Water is broken down into hydrogen and oxygen.
  2. Salt is isolated from seawater through evaporation.
  3. Propane reacts with oxygen to form carbon dioxide and
    water.
  4. Calcium carbonate decomposes to form calcium oxide and carbon dioxide.
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50. Which of the following elements has the greatest electronegativity?
  1. hydrogen (H)
  2. fluorine (F)
  3. astatine (At)
  4. francium (Fr)
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