A beaker is filled completely with water at $4^{\circ} \mathrm{C}$. Identify the incorrect statement.

A beaker is filled completely with water at $4^{\circ} \mathrm{C}$. Identify the incorrect statement.
  1. Water overflows when heated above $4^{\circ} \mathrm{C}$.
  2. Water overflows when cooled below $4^{\circ} \mathrm{C}$.
  3. Water overflows either when heated above $4^{\circ} \mathrm{C}$ or cooled below $4^{\circ} \mathrm{C}$.
  4. Water will not overflow when cooled below $4^{\circ} \mathrm{C}$.

Solution

The density of water is maximum at $4^{\circ} \mathrm{C}$. As the temperature increases or decreases, the density of water decreases, which increases its volume. Hence, water overflows either when heated about $4^{\circ} \mathrm{C}$ or cooled below $4^{\circ} \mathrm{C}$.

Asked in: AP EAMCET 2021 (25 Aug Shift 1)

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