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A drawing sheet changes when you draw a picture on it. Can you reverse this change?

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answer is 1.

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Detailed Solution

Change in shape/nature of an object can be of two types. They are reversible changes and irreversible changes.

a) The changes in which the object/matter can be brought back to its original state is known as reversible changes.

e.g., melting of wax, stretching of a rubber band etc.

b) The changes in which the object/matter cannot be brought back to its original state is called irreversible changes.

e.g., burning of wood, cooking of food etc.

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