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Question
Is burning a physical change or a chemical change? Why?
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Solution
Burning is a chemical change as new substance is formed with new properties and it cannot be reversed.
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RELATED QUESTIONS
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
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 |
Make a list of different types of changes with example.
Which of the following are physical changes and which are chemical changes ?
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
Given reason:
Burning of paper is a chemical change.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
Match the following
| Sr. No. | A | B | C |
| 1. | Melting | Change of state from liquid to solid | Ticking of clock |
| 2. | Condensation | Change of state from liquid to gas | Formation of ice cube |
| 3. | Evaporation | Change of state from solid to liquid | Collecting flowers |
| 4. | Freezing | Change of state from gas to liquid | Ice cube to water |
| 5. | Periodic change | Occurs at irregular time intervals | Water to steam |
| 6. | Non-periodic change | Occurs at regular time intervals | Steam to water drops |
What is the difference between dissolution of sugar and burning of sugar ?
