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प्रश्न
Select the chemical changes from the following list of changes
Respiration in mammals.
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उत्तर
Respiration in mammals is a CHEMICAL change, we breathe in oxygen and breathe out carbon dioxide. It is irreversible and composition changes.
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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 true or false for the statement
Decomposition of leaves is a fast change.
Write short answer.
Name two reversible changes.
Write true or false
Earthquake is a desirable change.
The rusting of an iron object is called :
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ 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.
When solute is dissolved in a solvent it forms a solution.
A physical change is generally____________.
