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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
Classify the following as chemical or physical change:
Cutting of trees
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
Classify the following as a physical or a chemical change.
Butter getting rancid
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Select the chemical changes from the following list of changes
Rotting of eggs.
Digestion of food is a physical change.
Distinguish physical and chemical changes.
State whether the following statements are true or false:
Anaerobic bacteria digest animal waste and produce biogas.
Give two examples for each of the following cases:
Physical changes are reversible.
