Advertisements
Advertisements
प्रश्न
Name two reversible changes.
Advertisements
उत्तर
Melting of ice.
Dissolving of salt in water.
APPEARS IN
संबंधित प्रश्न
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Fill in the blank.
Changes that occur in nature are called ........................
True or false
Change of seasons is a non-periodic change.
True or false
Dissolving of a solid in liquid is a physical change.
Fill in the blank.
The reaction in which energy is evolved is called
Ice kept in a beaker, slowly melts and turns into water. The water in the beaker on solidification is freezing turns back to ice. Give four reasons why the change from ice to water and water back to ice is considered a physical change.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
What type of energy changes is associated when ice melts?
The change of state of a substance from solid to liquid and liquid to gas is ______.
Give an example of a physical change in which the color of the substance changes.
