Question

What is irreversible change?Give two examples.​

Answer 1

Answer:

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. These bubbles and the liquid mixture left behind, cannot be turned back into vinegar and bicarbonate of soda again.

Answer 2

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A change is called irreversible if it cannot be changed back again. In anirreversible change, new materials are always formed. 

Examples

• Heating
• Mixing
• Burning