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Question

Chemistry Question on Solutions

Rusting of iron is catalysed by

A

Fe

B

O2O_2

C

Zn

D

H+H^+

Answer

H+H^+

Explanation

Solution

Rusting of iron is catalyzed by** ** H+H^+** ions.**

Rustingis the formation of rust oriron oxides on the surface of an object. Rust forms due to the reaction between oxygen and water (present as moisture). This is a redox reaction**. **

Rust is an iron oxide. These oxides are ahydrated iron (III) oxide having the general formula as Fe 2O3 .nH2O . This is because iron is known to exhibit two different valencies of +2 and +3. Thus the iron oxides are either ferrous oxideorferric oxide. Rusting is catalyzed by the presence of H + ions (acidic medium). The reaction is given by:

  • Fe⟶Fe2++2e−Fe \longrightarrow Fe^{2+}+2 e^{-}
  • 2H++2e−⟶H22 H^{+}+2 e^{-} \longrightarrow H_{2}

Also Read:Types of Redox Reactions