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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
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Classify the following changes as physical or chemical:- melting of a solid (wax)
Name a chemical change which takes place in presence of:
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.
State the Differences Between a Physical Change and a Chemical Change.
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Water is the universal solvent. Why?
Fill in the blanks in the following statements using the words given in the box.
| rusted, colourful, substance, chemical, physical, reversible, iron oxide, object |
- Making sugar solution is a ______ change.
- A physical change is generally ______.
- Grinding of wheat grain changes its size. It is a ______ change.
- Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.
