Advertisements
Advertisements
प्रश्न
Under which different types can the following changes be classified?
Conversion of milk into yoghurt.
Advertisements
उत्तर
The conversion of milk into yoghurt can be classified under the following types of changes:
- Chemical Change → A new substance (yoghurt) is formed from milk, and the change cannot be reversed easily.
- Irreversible Change → Once milk turns into yoghurt, it cannot be changed back into milk.
संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
True or false?
During a physical change energy is either given out or absorbed by the system.
Melting of solid (wax) is a physical change.
What role does energy play in initiating a chemical change ?
Under which different types can the following changes be classified?
Revolution of the earth around the sun.
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 _________.
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 |
Paper, LPG, CNG petrol, etc, are ______ substances.
