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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.
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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
Classify the following changes as physical or chemical: curdling of milk
Classify the following changes as physical or chemical:-boiling
True or false
Dissolving of a solid in liquid is a physical change.
Classify the following changes as physical or chemical.
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
What type of energy changes is associated when ice melts?
