Question

if iron is dipped in two test tubes containing oil and water,which will get rusted?why?

Answer 1

iron dipped in water will get rusted because in oil no oxygen can be enter but in water less amount of oxygen can enter.
hope it is helpful for u.

Answer 2

The iron nail dipped in water will be rusted because it will be in contact of water and oxygen (dissolved in water) .

The iron nail in test tube filled with oil will no be get rusted because it does not have contact with water and oxygen.

Rust is also called Hydrated Iron Oxide
(Fe2O3.xH2O)