Question

Fill in the blanks to say whether the following changes are 'reversible' or irreversible':
1. A change which cannot be reversed is called ............................... .
2. Setting of cement is an example of a ............................... change.
3. Absorption of water by a sponge is an example of a ............................... change.
4. Cooking of food represents ............................... change.
5. Digestion of food is a ............................... change.

Answer 1

1. A change which cannot be reversed is called irreversible change.
2. Setting of cement is an example of a irreversible change.
3. Absorption of water by a sponge is an example of a reversible change.
4. Cooking of food represents irreversible change.
5. Digestion of food is a chemical change.