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प्रश्न
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
विकल्प
physical change
chemical change
endothermic change
exothermic change
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उत्तर
When a woolen yarn is knitted to get a sweater, the change can be classified as physical 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 true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
Write true or false
Decomposition of leaves is a fast change.
Classify the following as physical or chemical change :
Growth of a plant
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
Water is the universal solvent. Why?
