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Free CLEP Science and Mathematics Exam Braindumps (page: 30)

Page 29 of 128
PDF with 494 Questions

Forms ions with +1 charge in solution

  1. Na
  2. Zn
  3. Hg
  4. N
  5. He

Answer(s): A

Explanation:

Sodium forms +1 ions in solution, for example NaCl and NaOH.



Exists as a liquid in its elemental form

  1. Na
  2. Zn
  3. Hg
  4. N
  5. He

Answer(s): C

Explanation:

Mercury is the only metal which exists as a liquid in its elemental form. Sodium and zinc are typically solids, while nitrogen and helium typically exist in gaseous forms.



Forms a compound having the formula XH, (where X is an element).

  1. Na
  2. Zn
  3. Hg
  4. N
  5. He

Answer(s): D

Explanation:

Nitrogen typically forms a -3 oxidation state to form NH, (ammonia). No other answer choice forms a -3 oxidation state, thus could not form XH3.



Which point is the critical point?

  1. Point A
  2. Point B
  3. Point C
  4. Point D
  5. Point E

Answer(s): C

Explanation:

The critical point corresponds to the critical temperature and pressure when liquids and gases are no longer distinguishable phases.






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