Take three glass bottle with wide mouths.lable them A,B and C.fill about half of bottle A with ordinary tap water .fill boiled for several minute, to the same level as in A.in bottle C take the same amout as in other bottles. In each bottle C so that is drama a flim on its surface .put the bottle away for few days. Take out nails from each bottle and observe them .explain your observation.
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Both the factors are present in the bottle A since oxygen is dissolved in water. In bottle B, water is boiled and hence dissolved air is removed. Due to lack of oxygen, iron nails do not rust much. In bottle C, the layer of oil present prevents dissolving of atmospheric air in the water and hence no rusting occurs.
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