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Target: 10 Questions in 10 minutes
An IB Chemistry data booklet is helpful
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1. Which is true for methane, CH4?
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Boiling point |
Because ... |
| A |
high |
the C-H bonds in methane are strong |
| B |
high |
methane has strong intermolecular forces |
| C |
low |
the C-H bonds in methane are weak |
| D |
low |
methane has weak intermolecular forces |
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2. Which one of the following exhibits intermolecular hydrogen bonding?
- A. HF
- B. HCl
- C. HBr
- D. HI
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3. Which substance will have the greatest dipole-dipole force between molecules?
- A. CF4
- B. CH4
- C. CH2F2
- D. CH2Cl2
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4. Which list shows the substances in order of increasing boiling point?
- A. CH3CHO < CH3CH2OH < CH3CH2CH3
- B. CH3CH2CH3 < CH3CH2OH < CH3CHO
- C. CH3CH2OH < CH3CHO < CH3CH2CH3
- D. CH3CH2CH3 < CH3CHO < CH3CH2OH
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Q5-7
Three types of intermolecular forces are listed below:
| I. Hydrogen bonds |
| II. London (dispersion) forces |
| III. Dipole - dipole forces |
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5. Which intermolecular forces are included in the term “Van der Waals” forces?
- A. I and II only
- B. I and III only
- C. II and III only
- D. I, II and III
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6. Which intermolecular forces exist between molecules of BF3?
- A. II only
- B. III only
- C. II and III only
- D. I, II and III
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7. Which intermolecular forces exist between molecules of propanone, CH3COCH3?
- A. I only
- B. III only
- C. II and III only
- D. I, II and III
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8. Which statement is true about the trend in boiling point of the halogens, X2, as you descend the group?
- A. It decreases because the bond strength of the X-X bond decreases
- B. It decreases because the electronegativity of the halogens decreases
- C. It increase because the strength of the dipole-dipole forces increases
- D. It increases because the strength of the London forces increases
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9. Which compound has the highest boiling point?
- A. NH3
- B. PH3
- C. AsH3
- D. SbH3
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10. Which substance is most soluble in water?
- A. ethane, CH3CH3
- B. ethanoic acid, CH3COOH
- C. ethanal, CH3CHO
- D. ethanol, CH3CH2OH
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