Practice Quiz

CLEP Chemistry Practice Test - Question List

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91. Palmitic acid, a component of most animal fats, has the molecular formula CH3(CH2)14COOH. Which of the following is the empirical formula for palmitic acid?
  1. CHO
  2. C3H6O2
  3. C8H16O
  4. C16H32O2
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92.

Which of the following statements describes all exothermic reactions?

  1. Exothermic reactions form gases
  2. Exothermic reactions require a catalyst
  3. The energy of the reactants is lower than the energy of the products
  4. The energy of the reactants is higher than the energy of the products
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93. Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?
  1. Potassium and bromine both have valence electrons in the fourth energy level.
  2. Potassium and bromine have the same number of electrons in their highest energy levels.
  3. Potassium has one electron in its highest energy level, and bromine needs one electron to complete its highest energy level.
  4. Potassium needs one electron to complete its highest energy level, and bromine has an extra electronin its highest energy level.
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94. Which of the following statements best explains why atoms bond?
  1. Atoms bond to make new substances.
  2. Atoms bond to become less chemically stable.
  3. Atoms bond to change froma liquid to a solid.
  4. Atoms bond to become more chemically stable.
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95. Which of the following changes of state will increase the entropy of water molecules?
  1. H2O(g) ↔ H2O(s)
  2. H2O(g) ↔ H2O(l)
  3. H2O(l) ↔ H2O(s)
  4. H2O(s) ↔ H2O(l)
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