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प्रश्न
Write true or false
Melting of ice is a physical change.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
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 |
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Classify the following as physical or chemical properties
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
Cutting a log of wood into pieces is a chemical change.
