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प्रश्न
State whether the following is physical or chemical change.
Digestion of food —
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उत्तर
chemical change.
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
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.
State whether the following is physical or chemical changes.
cutting wood into small pieces —
The rusting of an iron object is called :
Fill in the blank.
The process of a liquid changing into a solid is called ________
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.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
When solute is dissolved in a solvent it forms a solution.
Mention a few physical properties of a substance.
