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प्रश्न
Write true or false
Burning of paper and formation of curd are reversible changes.
पर्याय
True
False
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उत्तर
False.
Burning of paper and formation of curd are irreversible changes.
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संबंधित प्रश्न
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 |
Give two examples of periodic changes.
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Give four difference between physical and chemical changes.
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Sublimation of Iodine is a ______.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
Give two examples for the following case:
Physical changes which are reversible
Iron pipes coated with zinc do not get rusted easily.
