Question

Give two examples of reversible changes.

Answer 1

Hint: Reversible changes can be reversed as the name suggests, similarly irreversible changes cannot be reversed. There are several common examples that we experience every day which are reversible and irreversible.

Complete answer:
To give examples of reversible changes, let us first take a look at what reversible changes are.
Reversible changes are those changes which can be reversed, these changes are reversible once done they still can be undone.
Several examples of reversible changes are experienced by us in day to day life. The simplest example of reversible change is forming of ice, water can turn into ice when it is freezed. If the ice is taken out of the freezer, it melts and again changes into water.
Thus, this can be accounted as a reversible change. In general formation of any liquid into solid and solid into liquid can be accounted as a reversible change. Liquid can also turn into gas and gas can again turn into liquid. Thus, change of state of matter can be called a reversible change.
Another example of reversible change can be blowing a balloon. Once a balloon is blown to its full size, it can again come to its minimum size by releasing the air filled in it. This process is reversible at all times, the balloon can be blown and it also can be contracted until it bursts.
In short, reversible changes can be temporary, but irreversible changes are permanent.

Note:
Similar to real life experiences, chemical reactions are also reversible and irreversible. The reactions in which the products can again be converted into its reactants, then it is called a reversible reaction. The reaction in which the products cannot be converted into its reactants, is called an irreversible reaction.