Practice questions

• Drawing showing 2 bonding pairs and 3 lone pairs (1)

  Linear (1)

  180 (1)


  Question

  
• Lone pairs repel more strongly than bonding pairs (1)

  Bond angle lowers to 104.5 (1)


  Question

  
• P double bonded to O and 3 bonds to CL(1)

  with a tetrahedral shape (1)

  Square planar (1)

  90 (1)


  Question

  
• Answers

  (1) two lone pairs on each O atom and δ+ and δ- on each H-O bond (1) dotted/broken line shown between lone pair on one molecule and the correct H on another 1

  (1) O........H–O in straight line, dependent on M2 Ignore any partial charges on C–H or C–O bonds


  Questions

  
• Hydrogen bonding between ethanol molecules (1)

  Permanent dipole-dipole OR van der Waals force between methoxymethane molecules (1)

  Hydrogen bonding is stronger (1)


  Question

  
• Van der Waals forces (1)

  arise due to an uneven distribution of electrons in one molecule causing an induced dipole on nearby molecules (1)

  Symmetrical molecule so dipoles cancel

  No Hydrogen bonded to N , O , F


  Question

  
• Permenant dipole -dipole interactions arise due to a difference in electronegativities (1)

  As there is a Overall dipole moment there is an attraction between H and Cl (1)


  Question