Write balanced equation and identify the type of reaction and define it : Iron ||| oxide reacts with aluminium and gives molten iron and aluminium oxide.

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Solution

Dear Student,

The thermite reaction is the reaction of metal oxide with the aluminium. The aluminium acts as a reducing agent and the reaction is highly exothermic as heat is evolved. Also, the reaction takes place in presence of heat hence called a thermite reaction.

The reaction involved can be shown as:

$2 Al + {Fe}_{2} O_{3} \to 2 Fe + {Al}_{2} O_{3}$
Here oxidation as well as reduction both takes place. The heat produced is so large that the metal obtained in product exists in molten state.

This process is used in joining railway tracks and also to join broken parts of machines.

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Question 20.1

Write the balanced chemical equation for the following reaction and identify the type of reaction.

Thermit reaction: Iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.

Ferric oxide reacts with aluminium to produce aluminium oxide and iron. The balanced chemical equation for the given reaction is :

$F e_{2} O_{3}$ + $2 A l$ $\to$ $A l_{2} O_{3}$ + $2 F e$

Which of the following substances is oxidized in the given reaction?

F e_{2} O_{3 (x)} F e r r i c o x i d e + 2 A l_{(x)} A l u m i n i u m \to A l_{2} O_{3 (x)} A l u m i n i u m o x i d e + 2 F e_{(x)} I r o n

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