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प्रश्न
State whether the following is physical or chemical changes.
burning of wood -
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उत्तर
chemical change,
APPEARS IN
संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
Fill in the blank
An earthquake is a _______ change.
Distinguish between the following.
Periodic change and non-periodic change
Under which different types can the following changes be classified?
Conversion of milk into yoghurt.
Under which different types can the following changes be classified?
Stretching of a spring.
Fill in the blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
Fill in the blank with the correct word of the statement given below:
Ammonium chloride, a sublimable solid undergoes _________ on heating.
How can a change occur in a substance?
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 |
Cut vegetables turn brown when exposed to air, this is due to ______.
