Advertisements
Advertisements
प्रश्न
Give two examples for the following case:
Physical changes which are not reversible
Advertisements
उत्तर
- Cutting of paper
- Breaking of glass
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Write true or false
A natural change can also be a desirable change.
The rusting of an iron object is called :
Define a chemical change. Give two examples of the above changes.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
When ice melts to form water, change occurs in its
In a solution of salt in water, water is the solute
