Question
Explain the experiment to show rusting of iron.
✓
Answer
Aim: To demonstrate the rusting of iron.
Materials Required:
-Clean iron nails
-Two test tubes
-Water
-Oil
-Cotton
-Labels
Procedure:
-Take three clean iron nails.
-In the first test tube, put a nail and add water, leaving it open to air.
-In the second test tube, put a nail and cover it with oil to prevent contact with air.
-In the third test tube, put a nail and cover it with dry cotton to prevent contact with water.
-Leave all the test tubes undisturbed for a few days.
-Observe the nails after some days.
Observations:
-The nail in the first test tube develops rust (reddish-brown coating).
-The nail in the second test tube remains unchanged because water is not in contact.
-The nail in the third test tube also remains unchanged because moisture is absent.
Conclusion:
-Rusting of iron occurs only in the presence of both air (oxygen) and water.
-Preventing either air or water can stop rusting.
Materials Required:
-Clean iron nails
-Two test tubes
-Water
-Oil
-Cotton
-Labels
Procedure:
-Take three clean iron nails.
-In the first test tube, put a nail and add water, leaving it open to air.
-In the second test tube, put a nail and cover it with oil to prevent contact with air.
-In the third test tube, put a nail and cover it with dry cotton to prevent contact with water.
-Leave all the test tubes undisturbed for a few days.
-Observe the nails after some days.
Observations:
-The nail in the first test tube develops rust (reddish-brown coating).
-The nail in the second test tube remains unchanged because water is not in contact.
-The nail in the third test tube also remains unchanged because moisture is absent.
Conclusion:
-Rusting of iron occurs only in the presence of both air (oxygen) and water.
-Preventing either air or water can stop rusting.
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Observation: Table : Formation of brown deposit on iron nails
| Glass Bottle A | Conditions | Observations | |
| Presense of water (Yes/No) | Presence of air (Yes/No) | ||
| A | |||
| B | |||
| C | |||