Intermolecular Forces of Attraction

Q. Iodine $\left(I_2\right)$ crystals can be categorized into:

1. Metallic solid
2. Ionic solid
3. Molecular solid
4. Covalent solid

Q. Which one of the following statements about water is FALSE?

1. Water can act both as an acid and as a base
2. There is extensive intramolecular hydrogen bonding in the condensed phase
3. Ice formed by heavy water sinks in normal water
4. Water is oxidized to oxygen during photosynthesis