Question

Give to examples show the difference between @/n/and/3:/

Answer 1

Answer:

The changes which can be reversed are called reversible changes.

The changes which cannot be reversed are called irreversible changes.

Examples of reversible and irreversible changes.

Reversible changes

Irreversible changes

1. Glowing of an electric bulb. (It glows when switched on and becomes dark when switched off.)

1. Burning of paper or wood. (It gives smoke and ash, which cannot form paper or wood again.)

2. Distillation of liquid.

Liquid

condensation

⇌

evaporation

Vapour

2. Rusting of iron. (Rust cannot be changed into iron again.)

3. Sublimation

solid

cool

⇌

heat

vapor

3. Making of curd from milk.

4. Collapsing of mimosa (touch me not) leaves on touching and opening up on removing the finger.

4. Growth of plants and animals.