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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
Chemical changes are accompanied by changes in energy.
Write short answer.
Sublimation is classified as a physical change. Why ?
What role does energy play in initiating a chemical change ?
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
True or false
In a physical change no net energy change is involved.
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Select the chemical changes from the following list of changes
Breaking of glass
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Grinding of wheat grain changes its size. It is a ____________ change.
Explain the characteristics of physical change with examples.
