Which of the following is an example of physical change?

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Burning of paper

Melting of ice

Rusting

Cooking food

answer is B.

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Detailed Solution

A change in which a substance undergoes a change in its physical properties and no new substance is formed is called a physical change.
In the melting of ice, only the state of ice is changed to water due to heating. There is no chemical reaction taking place.
Chemically ice and water are the same, so no new substance is formed.
Hence melting of ice is a physical change.
In the burning of paper, rusting, and cooking of food, chemical reactions take place and they are examples of chemical change.

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