Advertisements
Advertisements
प्रश्न
Name two reversible changes.
Advertisements
उत्तर
Melting of ice.
Dissolving of salt in water.
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
Write short answer.
Give two examples of periodic changes
Solve this crossword by using the clues that follow.
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change
Write true or false
Cutting of paper into pieces is a chemical change.
Write true or false
Deforestation is a man-made change.
State the Differences Between a Physical Change and a Chemical Change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Select the chemical changes from the following list of changes
The occurrence of lightning.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
What kind of change is shown by tearing of paper?
