Question

If same weight of liquid water and piece of ice is taken, then why is density of ice less than that of liquid water?

• A. Because ice is a solid
• B. Because molecules of ice are closely packed
• C. Because vacant spaces are present in crystal lattice of ice.
• D. The given statement is wrong.

Answer 1

The correct option is C

Because vacant spaces are present in crystal lattice of ice.

In ice, molecules of $H_{2}O$ are packed so closely as in liquid water. There exists vacant spaces in the crystal lattice of ice. This results in larger volume and lower density. $Density=\frac{mass}{volume}$