Question

Write two examples of which cannot be reversed?

Answer 1

answere : Melting of ice is a reversible change. Water can be turned into ice by keeping it in the freezer. When ice cubes are kept at room temperature, they turn into water after some time. On the other hand, burning of a piece of paper is an irreversible change. When a piece of paper is burnt, it turns into ash. The ash cannot be turned back into paper. Hence, it is an irreversible change.