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Free CLEP Science and Mathematics Exam Braindumps (page: 34)

Page 33 of 128
PDF with 494 Questions

What type of reaction is 6Li + 2H ?

  1. Acid-base reaction
  2. Nuclear reaction
  3. Combustion reaction
  4. Precipitation reaction
  5. No reaction

Answer(s): B

Explanation:

I he products are two alpha-particles (2He2). This is the initial fusion reaction that occurs in a hydrogen bomb.



What type of reaction is Pb(NO3)2(aq) + 2NaI(aq) ?

  1. Acid-base reaction
  2. Nuclear reaction
  3. Combustion reaction
  4. Precipitation reaction
  5. No reaction

Answer(s): D

Explanation:

The products are PbI2(s) + 2NaNO3(aq). Because PbI2 precipitates from solution, this is a precipitation reaction.



Has the highest boiling point.

  1. H2O
  2. H2S
  3. H2Se
  4. H2Te
  5. HCl

Answer(s): A

Explanation:

Water has the highest boiling point as a result of hydrogen bonding. All other species listed are gases at STP.



Has the highest molecular weight.

  1. H2O
  2. H2S
  3. H2Se
  4. H2Te
  5. HCl

Answer(s): D

Explanation:

The molecular weight of H2Te is 129.6g/mol. Although increasing molecular weight usually results in higher boiling points, stronger intermolecular forces, like those seen in water, outweigh the factor of molecular weight.






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