Practice Quiz

IB Chemistry Test Prep - Question List

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26. H2S + H2O --> HS- + H3O+

In the reaction above, what is the conjugate base of H2S?
  1. H2O
  2. HS-
  3. H3O+
  4. H2S has no conjugate base
  5. H2S acts as its own conjugate base
See answer
27. What term classifies a phase change from a solid directly to a gas?
  1. Vaporization
  2. Deposition
  3. Effervesence
  4. Fusion
  5. Sublimation
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28. Which of the following molecules does not display hydrogen bonding in the liquid phase?
  1. H2O
  2. CH3CH2NH2
  3. CH4
  4. NH3
  5. HF
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29. Which of the following elements is the most electronegative?
  1. Boron
  2. Lithium
  3. Potassium
  4. Oxygen
  5. Cesium
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30. Which of the following molecules acts as a Lewis acid?
  1. HCl
  2. SO42-
  3. CCl4
  4. H3PO4
  5. BH3
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