Water exhibits an anomalous behavour; it
contracts on heating between 0 °C and 4 °C.
The volume of a given amount of water decreases
as it is cooled from room temperature, until its
temperature reaches 4 °C. Below
4 °C, the volume increases, and therefore the
density decreases. Water has a maximum
density at 4 °C.
therefor assertion and reason in the 2nd qts. is false.
