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In the welding of railway tracks, a prop...

In the welding of railway tracks, a proper proportion of aluminium powder and iron (iii) oxide are made to react with each other at high temperature. Explain the type of reaction involved and also identify the reducing and the oxidizing agents.

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At high temperature, aluminium reacts with iron (III) oxide.
`2Al + Fe_2O_3 to Al_2 O_3 + 2Fe + "Heat"`
It is a displacement as well as an exothermic reaction. Al acts as a reducing agent as it undergoes oxidation while `Fe_2O_3` acts as an oxidizing agent as it undergoes reduction.
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