Advertisements
Advertisements
प्रश्न
What are reversible and irreversible changes ? Give one example for each.
Change is the law of nature and occur in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Reversible and irreversible change.
Advertisements
उत्तर
- Reversible change : When a change in a substance can be reversed by changing the conditions, it is said to be a reversible change.
Example : Melting of ghee or wax. - Irreversible change : When a substance can not be brought back to its original state after a change, it is said to be an irreversible change.
Example : Souring of milk.
संबंधित प्रश्न
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
Write short answer.
Give an example of desirable change which can also be undesirable
Define physical change. Give two examples for the above changes.
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Select the chemical changes from the following list of changes
The occurrence of lightning.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Wood to sawdust:______:: Wood to Ash: Chemical change
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
