Question

Write the principle involved in the following: On choosing a reducing agent for metal oxides (Al₂O₃ and Fe₂O₃) to respective metal.

Answer 1

The principle here is reactivity series of metals.

The high reactive metals displace the less reactive metal from its compound. Here, since Aluminium is more reactive than iron, it displaces iron from its oxide.

This reaction is called as thermite reaction and is also used in welding or joining the railway tracks..

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