Water has many exceptional and useful properties. Which is the rarest property among compounds? Water has many exceptional and useful properties. Which is the rarest property among compounds? Solid water is less dense than liquid water. Water has surface tension. Water has a high heat capacity. Water is a solvent.

The density of ice is less than the density of water (liquid). We generally observe that the density of a solid substance is more than its liquid form as volume of a solid is generally less than the liquid, However in case of water this is not true.

The volume of ice is less than that of liquid water due to an open cage like structure in ice which gives its a wide structure. This cage like structure is due to presence of hydrogen bond (more extensive) in ice.

The maximum density of water is observed at 4 degree celsius