Question

Which of the following graphs shows the variation in density of water with the temperature in the range from 0 ${}^{\circ }C$ to 10 ${}^{\circ }C$?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

When water is heated from 0${}^{\circ }C$, the density of water first increases from 0${}^{\circ }C$ to 4${}^{\circ }C$ and then decreases above 4${}^{\circ }C$ to 10${}^{\circ }C$. On the other hand, on cooling water from 10${}^{\circ }C$, the density of water first increases up to 4 ${}^{\circ }C$ and then decreases when it is cooled below 4${}^{\circ }C$ to 0${}^{\circ }C$. Thus, the density of water is maximum at 4 ${}^{\circ }C$ which is equal to 1 $gmc{m}^{-3}$.