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प्रश्न
Classify the following as a physical or a chemical change.
Drying of wet clothes
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उत्तर
Physical change
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
Classify the following as chemical or physical change:
Dissolving common salt in water.
Dissolving salt in water is a reversible change.
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
glowing of a bulb -
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 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 formed | e. irreversible change |
| f . slow change |
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
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.
Iron pipes coated with zinc do not get rusted easily.
