Practice Quiz

MCAS Chemistry Exam Practice - Question List

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41. An insect known as a water strider can walk across the surface of a pond. Which of the following is directly responsible for this insect being able to walk on the surface without sinking?
  1. ionic bonding
  2. oxygen bonding
  3. hydrogen bonding
  4. nonpolar covalent bonding
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42. A person left a bottle of distilled water and a bottle of a sugary drink outside overnight. In the morning, one liquid was frozen but the other was not. Which liquid was frozen and why did it freeze?
  1. The sugary drink froze because solutions are more dense than pure substances.
  2. The distilled water froze because pure substances are more dense than solutions.
  3. The sugary drink froze because solutions have a higher freezing point than pure substances.
  4. The distilled water froze because pure substances have a higher freezing point than solutions.
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43. Which of the following characteristics of an element can be determined precisely by considering only the element’s specificposition on the periodic table?
  1. radius of each ion
  2. density of the solid
  3. boiling point of the liquid
  4. number of protons in each atom
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44. The pH of four different solutions of common materials is measured. Which of the following lists the solutions in order from most acidic to most basic?
  1. battery acid, lemon juice, blood, laundry detergent
  2. lemon juice, battery acid, blood, laundry detergent
  3. laundry detergent, blood, lemon juice, battery acid
  4. battery acid, blood, laundry detergent, lemon juice
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45. Which of the following statements explains why the bond in hydrogen chloride (HCl) is polar covalent?
  1. The atomic mass of chlorine is greater than that of hydrogen.
  2. The electronegativity of chlorine is greater than that of hydrogen.
  3. The diameter of a chlorine atom is greater than that of a
    hydrogen atom.
  4. The number of valence electrons in a chlorine atom is greater than that in a hydrogen atom.
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