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Question
Fill in the blank
Burning of fuel is a _______ change.
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Solution
Burning of a fuel is a chemical change.
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Picture based question
Observe the picture and list down the changes that are accompanied in the picture.
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Observe the picture containing a kettle and note that it has salt water in it and answer the following questions:
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Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.
| S. No. | Change | Can be reversed (Yes/No) |
| 1. | The sawing of a piece of wood | |
| 2. | The melting of ice candy | |
| 3. | Dissolving sugar in water | |
| 4. | The cooking of food | |
| 5. | The ripening of a mango | |
| 6. | Souring of milk |
The difference between initial state and the final state is called change.
What is the change?
Cut vegetables turn brown when exposed to air, this is due to ______.
