Practice Quiz

MCAS Chemistry Exam Practice - Question List

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6. Silver (Ag) has 47 protons in each atom. Based on this information, which of the following also describes an atom of silver
  1. It has no neutrons.
  2. It has 47 electrons.
  3. It has 23 neutrons and 24 electrons.
  4. It has a total of 94 neutrons and electrons.
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7. In a hydrogen fluoride (HF) molecule, a hydrogen atom and a fluorine atom are held together by a polar covalent bond. Which of the following best explains why this bond is polar?
  1. the large difference in the atomic radii of hydrogen and fluorine atoms
  2. the large difference in the atomic masses of hydrogen and fluorine atoms
  3. the large difference in theelectronegativities of hydrogen and fluorine atoms
  4. the large difference in the number of electrons of hydrogen andfluorine atoms
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8. Which of the following occurs in an ionic bond?
  1. Two ions share protons.
  2. Two ions share electrons.
  3. Similarly charged ions attract.
  4. Oppositely charged ions attract.
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9. Which of the following lists three states of water in order of increasing entropy?
  1. ice, liquid, vapor
  2. liquid, ice, vapor
  3. ice, vapor, liquid
  4. vapor, liquid, ice
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10. Which of the following activities could cause liquid molecules to overcome intermolecular attractive forces and become gas molecules?
  1. adding a solute to the liquid
  2. adding a catalyst to the liquid
  3. increasing the temperature of the liquid
  4. increasing the air pressure above the liquid
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