Question

Which of the following changes cannot reversed? ​

Answer 1

Explanation:

Changes that cannot be reversed are called irreversible changes. Some examples are as follows : Milk into curd. Burning of wood

Answer 2

A change is called irreversible if it cannot be changed back again. In an irreversible change, new materials are always formed.Eg A cooked egg cannot be changed back to a raw egg again. Mixing substances can cause an irreversible change. For example, when vinegar and bicarbonate of soda are mixed, the mixture changes and lots of bubbles of carbon dioxide are made. Burning is an example of an irreversible change.