Question

Chemically rust is
 A.Hydrated ferrous oxide
 B.Only ferric oxide
 C.Hydrated ferric oxide’
 D.None of these

Answer 1

Hint: We have to know that, rust is an overall name for a complex of oxides and hydroxides of iron, which happen when iron or some combinations that contain iron are presented to oxygen and dampness for an extensive stretch of time. Over the long haul, the oxygen joins with the metal shaping new mixtures aggregately called rust.

Complete answer:
We have to know that, rust is an iron oxide, a typically ruddy earthy colored oxide shaped by the response of iron and oxygen in the reactant presence of water or air dampness. Rust comprises of hydrous iron(III) oxides $\left( {F{e_2}{O_3}.n{H_2}O} \right)$ and iron(III) oxide-hydroxide $\left( {FeO\left( {OH} \right),Fe{{\left( {OH} \right)}_3}} \right)$ , and is commonly connected with the erosion of refined iron.
Given adequate time, any iron mass, within the sight of water and oxygen could ultimately change over totally to rust. Surface rust is generally flaky and friable, and gives no passivational security to the hidden iron, in contrast to the development of patina on copper surfaces. Rusting is the normal term for consumption of basic iron and its composites like steel. Numerous different metals go through comparable consumption, however the subsequent oxides are not usually called "rust".
$4Fe + 3{O_2} + 2{H_2}O \to 2F{e_2}{O_3}.{H_2}O$
Hydrated iron (III) oxide is otherwise called hydrated ferric oxide on the, that here oxidation condition of iron is $ + 3$ . Because the cycle of the rusting begins to corrupt and the iron gets futile and feeble.

Therefore, the correct option is (C).

Note:
A compound property portrays the capacity of a substance to go through a particular synthetic change. A substance property of iron is that it is equipped for joining with oxygen to frame iron oxide, the compound name of rust. The more broad term for rusting and other comparable cycles is erosion.