Metallurgical Processes

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This is the correct answer, as these methods are used to prevent rusting.

This is the the correct answer, as these are the examples of physical change.

Ductility is the physical property of a metal that allows it to be stretched or drawn into a thin wire without breaking. Malleability, by contrast, refers to the ability to be hammered into thin sheets.

Quenching is a heat treatment process where a metal is heated to a high temperature and then rapidly cooled, usually in water or oil, to increase its hardness.

When iron rusts, it reacts with oxygen and moisture in the air to form iron oxide. Because oxygen atoms from the air are added to the iron, the total mass of the resulting substance increases.

Rust is a reddish brown hydrated oxide of iron. It is formed when iron is exposed to oxygen in the presence of moisture.

Yes, it is made by mixing iron with carbon, chromium, nickel and manganese.

Salt water of sea makes the process of rusting faster.

The industrial extraction of aluminium from its ore, bauxite, is achieved through the Hall-Heroult process, which relies on the electrolysis of molten alumina.

Vegetable ghee is produced by the hydrogenation of vegetable oils. Hydrogenation is a chemical reduction process where hydrogen is added to the unsaturated double bonds of the oil.

Galvanization is the process of applying a protective zinc coating to steel or iron to prevent rusting. The zinc acts as a sacrificial anode.

Wrought iron is the purest form of commercial iron, containing the lowest percentage of carbon (typically less than 0.08 percent). In contrast, pig iron and cast iron have much higher carbon contents.

Rust is a hydrated iron oxide, typically represented as a mixture of hydrated ferrous and ferric hydroxides or oxides formed in the presence of oxygen and moisture.

Iron ore (usually oxides like hematite) is converted to metallic iron by removing oxygen, which is a reduction process using carbon or carbon monoxide.