14. Which of the following covalent bonds has the largest dipole moment? ) - ) C) C-O Dj HN E) BF 15. Which bond is the shortest? H . H H -- II III 16. Determine the geometry of the following species :: -: - H :F: 1 -: : IV V 17. Which of the following molecules has a net dipole moment of zero? H :F: :: C=C C=C c=c :F: :: E: :E: : IV c=c :: C-C :E: :: 18. Arrange the following molecules in order of increasing boiling point ----- ----: :0---: H H H H ---6--- 1 - IV 19. Which of the compounds below is capable of forming hydrogen bonds between like molecules? H ----- ----F: -c-N--- ----- H T. I II III IV H --- C-: . IV 20. Which of the following compounds is expected to be the most soluble in H.O? H ---- ---- --- 1 21. Circle each central atom that you expect to be sp-hybridized H H le H-N-H H-CH H-N-H H-0- *0=c=o: H e