Try This. Apparatus : Four test tubes, four small iron nails, rubber cork, etc.Chemicals : Anhydrous calcium chloride, oil, boiled water, etc.234Procedure : Place four test tubes on atest tube stand. Take some boiled water1in one test tube and put an oil layer onit. Take some salt water in the secondtest tube. Let there be only air in thethird test tube. Take some anhyrouscalcium chloride in the fourth test tube.Place a small iron nail in every testtube. Close the fourth test tube with a Oil layer onrubber cork. Let all the four test tubes boiled waterremain un attended for a few days.SaltsolutionAir Air and anhydrouscalcium chloride3.7 To study rustingObserve all the four test tubes after a few days. What did you find? Which test tubeshad the nails as before? Both water and air are necessary for rusting The rusting processtakes place rapidly in presence of a salt Have you seen the effect of redox reaction inyour everyday life? The new vehicles look shiny, on the contrary old vehicles look dull. AA certain type of reddish coloured solid layer collects on their metallic surface. This layer iscalled 'rust. Its chemical formula is Fe, O, XH,O.​