Can any one write the experiment- to show that the air and water are necessary for rusting to takes place....
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Take three test tubes A, B and C and place one clean iron nail in each of them. In the test tube A pour some water and close its mouth with the help of a cork. In the test tube B pour boiled water which does not contain dissolved air. Also pour some oil in test tube B to form a layer over boiled water. The layer of oil will prevent the entry of air in water. In the test tube C put some anhydrous calcium chloride and cork it. Anhydrous calcium chloride is drying agent. So, it is added into test tube C to absorb all the moisture present in the air of test tube. Keep these test tubes undisturbed for some days.
After some days, you will observe that the nail in test tube B does not rust because the nail was exposed only to water and no air was present in it. In the same way the nail present in test tube C does not rust because in this tube air is dry and water is not present. But the nail present in test tube A rusts because in test tube A the nail was exposed to both air and water.
After some days, you will observe that the nail in test tube B does not rust because the nail was exposed only to water and no air was present in it. In the same way the nail present in test tube C does not rust because in this tube air is dry and water is not present. But the nail present in test tube A rusts because in test tube A the nail was exposed to both air and water.
sweety5611:
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hi frnd
here is ur answer
FOR RUSTING OF IRON
Take three test tubes and place clean iron nails in each of them.
Label these test tubes A, B and C. Pour some water in test tube A and cork it.
Pour boiled distilled water in test tube B and add about 1 ml of oil and cork it. The oil will flow on water and prevent the air from dissolving in the water.
Put some anhydrous calcium chloride in test tube C and cork it. Anhydrous calcium chloride will absorb the moisture from the air.
Leave all these test tubes for a few days and then observe them.
You will observe that iron nails in test tube A’ get rusted. But they do not rusted in test tubes B’ and C.
In the test tube A’ the nails are exposed to both air and water. In the test tube ‘B’ the nails are exposed to only water and the nails in test tube ‘C’ are exposed to dry air only.
From this activity we conclude that both air and water are necessary for corrosion (Rusting) or iron.
Investigation the conditions under which iron nail rusts
hope its helpfull
here is ur answer
FOR RUSTING OF IRON
Take three test tubes and place clean iron nails in each of them.
Label these test tubes A, B and C. Pour some water in test tube A and cork it.
Pour boiled distilled water in test tube B and add about 1 ml of oil and cork it. The oil will flow on water and prevent the air from dissolving in the water.
Put some anhydrous calcium chloride in test tube C and cork it. Anhydrous calcium chloride will absorb the moisture from the air.
Leave all these test tubes for a few days and then observe them.
You will observe that iron nails in test tube A’ get rusted. But they do not rusted in test tubes B’ and C.
In the test tube A’ the nails are exposed to both air and water. In the test tube ‘B’ the nails are exposed to only water and the nails in test tube ‘C’ are exposed to dry air only.
From this activity we conclude that both air and water are necessary for corrosion (Rusting) or iron.
Investigation the conditions under which iron nail rusts
hope its helpfull
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