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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
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
A physical change is temporary. Explain.
Write true or false
Melting of ice is a physical change.
Fill in the blank
Heat is ________ by a gas during the process of condensation.
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 |
Classify the following as physical or chemical change :
Growth of a plant
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Physical Change: Boiling::Chemical Change: ______.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
