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प्रश्न
Select the chemical changes from the following list of changes
Change of seasons
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उत्तर
Change of season is a PHYSICAL change, only change in temperature is seen and is a reversible change.
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संबंधित प्रश्न
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Write short answer.
What are man-made changes ?
True or false
Change of seasons is a non-periodic change.
Tick the most appropriate answer.
Photosynthesis requires
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 |
Name two reversible changes.
State the Differences Between a Physical Change and a Chemical Change.
Classify the following as a physical or a chemical change.
Burning of paper
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
