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प्रश्न
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
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उत्तर
Rust of iron is a chemical change as iron rust [Fe2O3χ H20] is a brown flaky powder having a different composition from original iron metal, which is an irreversible change.
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संबंधित प्रश्न
Fill in the blank.
An earthquake is a .................. change.
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
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Classify the following as a physical or a chemical change.
Melting of wax
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Desirable and undesirable change.
Name the following:
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Select the chemical changes from the following list of changes
Rotting of eggs.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
What is the difference between dissolution of sugar and burning of sugar ?
