Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then metal is extracted from it by electrolytic reduction.

Mention one reason for the use of aluminium in thermite welding.

It reduces Fe₂O₃ to iron in an exothermic reaction

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It oxidizes Fe₂O₃ to iron in an exothermic reaction

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It oxidizes Fe₂O₃ to iron in an endothermic reaction

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It reduces Fe₂O₃ to iron in an endothermic reaction

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Solution

The correct option is A
It reduces Fe₂O₃ to iron in an exothermic reaction

Aluminium is used in thermite welding because it reduces Fe₂O₃ to iron. This is a highly exothermic reaction. Heat produced melts iron, which is tapped into the parts to be welded

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Similar questions

F e_{2} O_{3} (s) \to F e (s) + 3 / 2 O_{2} (g)

C O

F e_{2} O_{3} + C O \to F e + C O_{2}

C O

F e

Iron oxides $F e_{2} O_{3}$ can be reduced by $A l$ in the Goldschmidt thermite process.

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?

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