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प्रश्न
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
पर्याय
Physical change
Chemical change
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उत्तर
Rusting of iron – Chemical change
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संबंधित प्रश्न
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 |
Write short answer.
Give two examples of periodic changes
Classify the Following as a Physical Or a Chemical change.
Glowing of an Electric Bulb
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
