Water boils at a much higher temperature than all other molecules of similar molecular weight because:
I) it makes very strong hydrogen bonds;
II) it is a very polar molecule;
III) it can make more hydrogen bonds per molecule than any other molecule;
IV) the OH bond is the most polar of all common bonds leading to the strongest dipole-dipole interactions.
Answers:
1. IV
2. I
3. II and IV
4. I and III
5. II
6. III
7. I and II
8. III and IV