(a) What is thermit process? Where is this process used? Write a balanced chemical equation for the reaction involved.(b) Where does the metal aluminium, used in the process, occurs in the reactivity series of metals?(c) Name the substances that are getting oxidised and reduced in the process.

(a) The thermite reaction is an exothermic reaction between the metal and metal oxide.
For example the reaction between the aluminium with the metal oxides, where aluminium acts as a reducing agent. The aluminium reduces the metal oxide most probably an iron (lll) oxide to produce ferrous and aluminium oxide.
Use of the thermite reaction:
  1. The reaction is used for thermite welding.
  2. The reaction is used to connect railway tracks.
  3. The reaction also used in the demolition of ammunitions and metal refining.

 During the reaction, a large amount of energy is released.

$Fe_2O_3 + 2Al → 2Fe + Al_2O_3 + heat$
(b) As aluminium is more reactive than iron, so it is placed above iron in the reactivity series.
(c)  Aluminium is getting oxidised, Fe2O3 is getting reduced in this process.

Updated on: 10-Oct-2022

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