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प्रश्न
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
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उत्तर
Heating a piece of iron is considered a physical change while heating a piece of coal [carbon] is considered a chemical change.
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
Match the columns
| column A | coulmn B |
| 1. A change which cannot be easily reversed | a. man-made change |
| 2.A change that repeats itself at regular intervals | b. chemical change |
| 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 formade | e. irreversible change |
| f. slow change |
Fill in the blank.
Growing of a seedling into a plant is _______ change.
True or false
Change of seasons is a non-periodic change.
Write true or false
Deforestation is a man-made change.
Which of the following are physical changes and which are chemical changes ?
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Select the chemical changes from the following list of changes
Rotting of eggs.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
