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प्रश्न
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
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उत्तर
Change of water into water vapours is a PHYSICAL change as no change in composition, only state changes, is reversible change on cooling vapour water is formed.
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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 ........................
A burning candle shows both physical and chemical changes. Explain ?
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Earthquake is a desirable change.
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
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.
State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Give two examples for the following case:
Physical changes which are reversible
