Question

Some materials may undergo reversible and irreversible changes. Give two examples to support this statement.
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Answer 1

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➠ same material can undergo reversible change or irreversible change under different set of conditions.

For example:

1)

➠ Melting and burning of wax

Reversible : If we slowly melt down the wax ,it will become solid again after cooling.

Irreversible : If we burn wax candle most of the wax will either evaporate or becomes carbon dioxide and other gases.

2)

➠ Folding of paper and cutting of paper

Reversible : Folding of paper is a reversible change

Irreversible : Cutting of paper is a irreversible change

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Answer 2

Answer:

Even the same material can undergo reversible change or irreversible change under different set of conditions.

Folding of Paper and Cutting of Paper. ...

Rolling a Roti and Baking a Roti. ...

3 Shaping of Wet Clay into Clay Pot and Baking a Clay Pot. ...

4 Inflating a Balloon and Bursting a Balloon. ...

Melting of Wax and Burning of Wax.

Explanation: