Question

Water is unusual because it expands as it freezes. Very few substances have this property. The reason liquid water is more dense then ice can be best explained by? A) water is the universal solvent. B) Water has an unusually high boiling point. C) Water contains elements that are not common in other substances. D) Water is polar and the positive and negative ends of the molecule attract each other.

Answer 1

It's because water is polar

so D

Answer 2

The correct answer is option D) Water is polar and the positive and negative ends of the molecule attract each other.

The water is a polar molecule, and forms a hydrogen bonding with the other water molecule. In the liquid state, the molecules of the water is in random motion, and the bond between the water molecules are continuously formed and deformed.

In the ice, the hydrogen bond between the water molecules become more stable, due to this, the molecules arrange themselves in a hexagonal pattern. Due to this arrangement, the allover space occupied is expanded. Hence, the ice is expanded than liquid water.