Advertisements
Advertisements
Question
What do you observe when :
a piece of paper is burnt
Advertisements
Solution
On burning piece of paper produces carbon dioxide and ash is left behind. Is a chemical change.
APPEARS IN
RELATED QUESTIONS
What do you observe when :
a spoon of sugar is heated in a pan
State whether the following is physical or chemical changes.
passing electric current through a heater rod —
State whether the following is physical or chemical changes.
Melting of wax —
State whether the following is physical or chemical changes.
Boiling of an egg —
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?
Bursting of a cracker.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
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 ______.
