CONCEPT: Density: - The mass per unit volume is called a density of a material. ⇒Density(ρ)=
Mass (m)
Volume(V)
- Density is a scalar quantity.
Temperature
Density (kgm−3)
100∘C
958.4
80∘C
971.8
60∘C
983.2
40∘C
992.2
4∘C
1.0×103
−10∘C
998.12
−20∘C
993.547
- When the water molecules are present in ice form then it has a lot of empty space within molecules. - When water melts then after converting into the water the molecules get closer to each other and they will be mostly closed to each other at 4∘C - Hence the density of water at 4∘C is maximum which is 1000kg∕m3. - From the above table, it is clear that the density of water at 4∘C is 1000kg∕m3. Therefore option 1 is correct.