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प्रश्न
The rusting of an iron object is called :
विकल्प
corrosion and it is a physical as well as a chemical change
dissolution and it is a physical change
corrosion and it is a chemical change
dissolution and it is a chemical change
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उत्तर
corrosion and it is a chemical change
Rusting of iron takes place in the presence of air (O2) and water vapour. Action of air and moisture on iron converts it to its oxide. This process is called corrosion and it leads to the formation of a new compound. Therefore, it is a chemical change.
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संबंधित प्रश्न
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
Define physical change. Give two examples for the above changes.
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Classify the following as a physical or a chemical change.
Melting of wax
Classify the Following as a Physical Or a Chemical change.
Glowing of an Electric Bulb
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Select the chemical changes from the following list of changes
Butter turning rancid
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
Iron pipes coated with zinc do not get rusted easily.
