Advertisements
Advertisements
प्रश्न
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Advertisements
उत्तर
| Physical change | Chemical change |
| Changes are temporary and reversible. | Change is permanent and irreversible |
APPEARS IN
संबंधित प्रश्न
Try segregating the things around you as pure substances or mixtures.
Photosynthesis cannot take place at night.
Which of the following are physical changes and which are chemical changes ?
Freezing of water
What will you take into account while identifying the following?
A chemical change in a substance.
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Match the examples of changes in List I with the correct type of change in List II.
| List I | List II |
| 1. Burning of paper | A: Physical change |
| 2. The ringing of an electric bell | B: Chemical change |
| 3. Curdling of milk | |
| 4. Electric light is switched on | |
| 5. Melting of butter |
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
