Question

Freezing of water and evaporation of water are both physical changes.

Answer 1

Hint:Water is a stable and most abundant liquid. Freezing of water and evaporation of water is the changes in the physical properties of water. So to find the reason we will focus on the physical properties of water.

Complete answer:
First, we will understand the physical changes. Physical changes are the changes in the physical properties without changing chemical properties. There are many real-life examples of physical changes. For example, change in state. Solid to liquid, liquid to gas, and gas to solid. Using this example we can easily understand the term ‘Physical change’.
We are considering one of the examples of physical change that changes in states of matter. We know that change in states is Solid to liquid, liquid to gas, and gas to solid. But we also know that reverse is also possible which means a state change can be from solid to gas, gas to liquid, and liquid to solid. So we can conclude that physical changes are reversible changes.
Now we know that physical changes are the reversible change that means we can achieve the original state again. Now we will consider the freezing of water and the evaporation of water.
Freezing of water is the change in state from liquid to solid. As we know that it is reversible we can melt the water and can change the state from solid to liquid.
Similarly, evaporation of water is also a reversible change as we can reduce the temperature which brings vapors back to the water.
Hence, the freezing of water and evaporation of water are reversible changes as they do not affect the chemical composition.

Note:
Water acts as a universal solvent due to high dielectric constant, polar nature, and association.The melting and boiling point of water is high due to the hydrogen bond.