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प्रश्न
Select the chemical changes from the following list of changes
The carbon cycle.
उत्तर
The carbon cycle is a PHYSICAL change as carbon remains as carbon, the mass of carbon remains the same in the cycle, is temporary, and only changes in the state take place.
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संबंधित प्रश्न
Fill in the blank.
An earthquake is a .................. change.
Is burning a physical change or a chemical change? Why?
Write true or false
Cutting of paper into pieces is a chemical change.
True or false
Change of seasons is a non-periodic 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.
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
Give four difference between physical and chemical changes.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
Iron pipes coated with zinc do not get rusted easily.
