Question

Make a list of various changes in our life. Also write that they are irreversible or reversible.
Example;
1)Milk to curd - irreversible
2)water to ice -reversible
Plz write atleast 3.....​

Answer 1

Examples of reversible changes

Melting: Melting is when solid converts into a liquid after heating. Example of melting is turning of ice into water.

Freezing: Freezing is when a liquid converts into a solid. Example of freezing is turning of water into ice.

Boiling: Boiling is when a liquid converts into a gas. Example of boiling is turning water into water vapour.

Examples of irreversible changes

Burning: When we burn a piece of paper or wood, it turns to ash and smoke. We cannot obtain paper and wood from the ash again.

Cooking: We use heat for cooking, right? Once we cook our eggs, we cannot uncook them. Therefore, cooking is an irreversible change.

Rusting of iron: You must have seen rusting of iron. When water vapour (humidity) comes in contact with the iron, they react. Therefore, iron rusts and once this happens, we cannot reverse it.