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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
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
Photosynthesis cannot take place at night.
Classify the following changes as physical or chemical:-boiling
Fill in the blank.
The process of a liquid changing into a solid is called ________
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
In a solution of salt in water, water is the solute
Physical Change: Boiling::Chemical Change: ______.
Which of the following is not a physical change?
