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प्रश्न
Select the chemical changes from the following list of changes
Rotting of eggs.
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उत्तर
Rotting of eggs is CHEMICAL change, change in composition takes place, is an irreversible process.
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संबंधित प्रश्न
Classify the following changes as physical or chemical:- melting of a solid (wax)
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 3. a change that is made by humans | c. physical change |
| 4. a change in which the original substance cannot be obtained | d. periodic change |
| 5. a change where no new substance is formed | e. irreversible change |
| f . slow change |
A physical change is temporary. Explain.
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Periodic and non-periodic change
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
Physical Change: Boiling::Chemical Change: ______.
