Question

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Answer 1

3 The reason for the coating of reddish brown color is because the iron reacts with the oxygen present in air. The reddish brown color pigment is Iron Oxide.

Answer 2

Hello mate!!

3.The reddish brown layer on iron isrust. It is obtained due to rusting of that metal.When an iron metal isattacked by substances around it such as moisture,acids etc. it is said to be corroded or rusted. That is why we findiron articles coated with that layer.

4.Fe reacts with the moisture and oxygen content in air to form ironoxides. The engineering properties (strength, hardness) decreases proportionally with the magnitude ofcorrosion. Hence, the stability of the structure decreases, a seriousphenomenon

5. Potato chip bags are not full of air, but of nitrogen gas. This is done to prevent the chips from oxidizing, which is part of what makes them go stale. Oxygen is very reactive, and likes to combine with other molecules whenever it can, causing chemical changes to take place.


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