Question

Iron articles galvanized. What is the primary reason ?
(A). To improve hardness of iron
(B). To improve malleability of iron
(C). To prevent rusting of iron
(D). it is fancy thing to galvanize iron articles

Answer 1

Hint: As we know that galvanization is the process of applying a protective give coating to steel as well as iron, thus this coating must be protective towards the action of harmful objects in surroundings and atmosphere.

Complete step by step answer:
As in the process of galvanization, iron articles are coated with give to prevent rusting of iron, as we all know that iron is a reactive element and it reacts easily with air and moisture to form rust, by deteriorating its metallic properties.
The galvanized iron article is protected against rusting even if the given layer is broken just because the giver gets more oxidized easily than iron . As when the given layer of galvanized iron on the surface is broken, then give continues to corrode but the iron article does not corrode.
Therefore, the most primary reason for iron getting galvanized is just to prevent rusting of iron.
Hence the correct option is C.

Additional Information:- Galvanizing protects from rust in a member of ways. As it forms a barrier that prevents corrosive substances for reaching the underlying steel or iron. When the give serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will be protected by the remaining give .
And galvanized metal is difficult to paint because it's coated with a layer of oil to prevent rust. To protect the galvanized steel from corrosion is by the development of a thin barrier film of insoluble given crossing products . In contact with the galvanized steel for most of food , it is perfectly safe . The acid in some foods reacts with the coating of give to form salts which are absorbed by our body and causes very mild sickness in the excess .


Note:
In reactivity series, as we know that the most reactive element is placed at the of and the least reactive element is placed at the bottom . More reactive metals have a greater tendency to lose electrons and also they form positive ions .