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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
Burning is a
विकल्प
slow process
fast process
natural process
none of the above
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उत्तर
fast process
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संबंधित प्रश्न
What do you observe when :
solid ammonium chloride is heated
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
Distinguish between the following.
Periodic change and non-periodic change
Distinguish between the following.
Natural change and man-made change
Under which different types can the following changes be classified?
Bursting of a cracker.
Under which different types can the following changes be classified?
Revolution of the earth around the sun.
Picture based question
Observe the picture and list down the changes that are accompanied in the picture.
- ______.
- ______.
- ______.
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 |
Paper, LPG, CNG petrol, etc, are ______ substances.
Cut vegetables turn brown when exposed to air, this is due to ______.
