Question

Mention two irreversible physical changes and explain why those changes are physical even though they are irreversible

Answer 1

1) A burnt match stick
2) Rusting of Iron
They are irreversible coz, when they undergo reactions, they lose their physical nature by means of deposition or shedding off of many substances

Answer 2

The two examples of irreversible physical changes are :

1. Cutting of paper : Cutting of paper is irreversible change because we cannot regain its shape so that it is irreversible physical change. This is physical change because no new product is formed.

2. Cutting of apple : If we cut an apple we cannot regain its original shape so that it is irreversible physical change. This is physical change because no new product is formed.

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