Practice Quiz

IB Chemistry Test Prep - Question List

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21. Which of these elements is most likely to have the highest second ionization energy? Hint: think of Lewis structures.
  1. Aluminum (Al)
  2. Phosphorus (P)
  3. Chlorine (Cl)
  4. Magnesium (Mg)
  5. Sodium (Na)
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22. One liter of hydrogen gas is placed in a vacuum. The emission spectrum of hydrogen shows a red line of wavelength 650 nm. What was the energy of the photon that released it?
  1. 2.9 * 10-28 J
  2. 4.1 * 10-31 J
  3. 2.9 * 10-19 J
  4. 4.1 * 10-19 J
  5. 2.9 * 10-15 J
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23. When sodium acetate, NaCH3COO, is added to water the resulting solution is basic. True or false?
  1. True
  2. False
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24. The following equation is under thermodynamic control. Assuming a temperature of 273K and using the provided information, find the Keq:

A + B --> C

DGf° (A) = -200 kJ/mol
DGf° (B) = -100 kJ/mol
DGf° (C) = -50 kJ/mol
  1. Keq = 1.46 * 10-14
  2. Keq = 1.46 * 10-38
  3. Keq = 1.46 * 10-48
  4. Keq = 0.83 * 10-27
  5. Keq = 0.83 * 10-32
See answer
25. Which of the following compounds contains a double bond?
  1. C2H6
  2. C2H4
  3. C3H8
  4. CH4
  5. C4H10
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