Intermolecular Forces (Grades 11-12)
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Intermolecular Forces
1.
Which of the following helps to identify the specific intermolecular forces existing between molecules?
- bond type
- density
- solubility
- molecular polarity
2.
Which of the following would likely involve the presence of London dispersion forces?
- [math] CF_4 [/math]
- HCl
- [math] H_2O [/math]
- MgO (aq)
3.
Which of the following would likely involve the presence of dipole-dipole forces?
- HF
- Ne
- [math] O_2 [/math]
- ICl
4.
Which of the following would experience boiling at the lowest temperature?
- [math] CH_4 [/math]
- [math] C_2H_6 [/math]
- [math] C_3H_8 [/math]
- [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?
- Bromine has weaker intermolecular forces than propane does.
- Bromine has greater molecular polarity than propane does.
- Bromine has weaker molecular polarity than propane does.
- Bromine has stronger intermolecular forces than propane does.
6.
Which of the following would likely involve the presence of hydrogen bonding?
- HCl
- HI
- HF
- HBr
7.
Which of the following statements correctly compares the behavior of a mixture of ethanol and water at STP?
- Water will evaporate first, because it has weaker intermolecular forces.
- Ethanol will evaporate first, because it has weaker intermolecular forces.
- Ethanol and water will evaporate simultaneously.
- The aqueous solution will evaporate partially at a temperature between the boiling points of water and of ethanol.
8.
What makes hydrogen bonding between water molecules, ammonia molecules, or molecule of hydrogen fluoride so strong?
- There is an attraction between a small, weakly electronegative hydrogen atom and a large, strongly electronegative atom of fluorine, nitrogen, or oxygen.
- There is an attraction between a small, highly electronegative hydrogen atom and a large, highly electronegative fluorine atom.
- There is an attraction between the hydrogen and oxygen atoms, only.
- 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.
- True
- False
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