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प्रश्न
Classify the following as a physical or a chemical change.
Boiling of water
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उत्तर
Physical change
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Fill in the blank.
An earthquake is a .................. change.
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
Classify the following changes as physical or chemical:- melting of a solid (wax)
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Slow and fast change.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
Select the chemical changes from the following list of changes
Respiration in mammals.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
