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प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
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उत्तर
Changes in which only physical properties of a substance change are called physical changes.
Explanation:
Physical changes alter only the physical properties, not the chemical composition, of a substance.
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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 |
State four differences between physical and chemical changes.
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Tick the most appropriate answer.
Photosynthesis requires
Write true or false
Burning of paper and formation of curd are reversible changes.
Classify the following as a physical or a chemical change.
Melting of wax
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
