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Chemistry µIB
4.4 Intermolecular Forces
10 quick questions

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10 minutes maximum

An IB Periodic Table is required.

1. Which correctly lists the intermolecular forces from weakest to strongest?
  • A.   dipole-dipole forces < hydrogen bonds < London (dispersion) forces
  • B.   London (dispersion) forces < dipole-dipole forces < hydrogen bonds.
  • C.   hydrogen bonds < dipole-dipole forces < London (dispersion) forces
  • D.   dipole-dipole forces < London (dispersion) forces < hydrogen bonds
2. Which one of the following exhibits intermolecular hydrogen bonding?
  • A.   HF
  • B.   HCl
  • C.   HBr
  • D.   HI
3. Which substance will have the greatest dipole-dipole force between molecules?
  • A.   CF4
  • B.   CH4
  • C.   CH2F2
  • D.   CH2Cl2
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

Q5-7
Three types of intermolecular forces are listed below:

I. Hydrogen bonds

II. London (dispersion) forces

III. Dipole - dipole forces

 
5. Which intermolecular forces are included in the term “Van der Waals” forces?
  • A.   II only
  • B.   III only
  • C.   II and III only
  • D.   I, II and III
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
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
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
9. Which compound has the highest boiling point?
  • A.   NH3
  • B.   PH3
  • C.   AsH3
  • D.   SbH3
10. Which substance is most soluble in water?
  • A.   ethane, CH3CH3
  • B.   ethanoic acid, CH3COOH
  • C.   ethanal, CH3CHO
  • D.   ethanol, CH3CH2OH