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प्रश्न
Select the chemical changes from the following list of changes
The carbon cycle.
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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
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Cutting of paper into pieces is a chemical change.
True or false
Is the process of digestion a physical change?
State the Differences Between a Physical Change and a Chemical Change.
Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct ?
- P is a compound
- X and Y are compounds
- X and Y are elements
- P has a fixed composition
Select the chemical changes from the following list of changes
Respiration in mammals.
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
When solute is dissolved in a solvent it forms a solution.
Give two examples for the following case:
Physical changes which are reversible
