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Intermolecular Forces (Grades 11-12)

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Intermolecular Forces

1. 
Which of the following factors plays an important role in the identification of specific intermolecular forces in a molecule?
  1. bond type
  2. density
  3. solubility
  4. molecular polarity
2. 
Which of the following molecules contains only London dispersion forces?
  1. [math] CF_4 [/math]
  2. HCl
  3. [math] H_2O [/math]
  4. MgO (aq)
3. 
Which of the following molecules predominantly consists of dipole-dipole forces?
  1. HF
  2. Ne
  3. [math] O_2 [/math]
  4. ICl
4. 
Which of the following molecules would have the lowest boiling point?
  1. [math] CH_4 [/math]
  2. [math] C_2H_6 [/math]
  3. [math] C_3H_8 [/math]
  4. [math] C_4H_10 [/math]
5. 
Propane is a gas at STP, while bromine is a liquid at STP. Which statement correctly explains these observations?
  1. Bromine has weaker intermolecular forces than propane does
  2. Bromine has greater molecular polarity than propane does
  3. Bromine has weaker molecular polarity than propane does
  4. Bromine has stronger intermolecular forces than propane does
6. 
Which of the following molecules has hydrogen bonding?
  1. HCl
  2. HI
  3. HF
  4. HBr
7. 
Which of the following statements correctly compares the behavior of a mixture of ethanol and water at STP?
  1. Water will evaporate first, because it has weaker intermolecular forces
  2. Ethanol will evaporate first, because it has weaker intermolecular forces
  3. Ethanol and water will evaporate simultaneously
  4. The aqueous solution will evaporate partially at a temperature between the boiling points of water and of ethanol
8. 
Which of the following statements correctly explains why hydrogen bonding is such a strong intermolecular force?
  1. There is an attraction between a small, weakly electronegative hydrogen atom and a large, strongly electronegative atom of fluorine, nitrogen, or oxygen
  2. There is an attraction between a small, highly electronegative hydrogen atom and a large, highly electronegative fluorine atom
  3. There is an attraction between the hydrogen and oxygen atoms, only
  4. There is an attraction between the hydrogen and nitrogen atoms, only
9. 
HCl and [math] F_2 [/math] both have a molecular mass of approximately 36 g/mol. Compare the boiling points of these two molecules, based on intermolecular forces.



10. 
Hydrogen bonds are a form of bonding.
  1. True
  2. False
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