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Q.

The reaction between iron oxide and aluminium is ${Fe}_{2} O_{3} + 2 Al \to {Al}_{2} O_{3} + 2 Fe$ . The reaction is an example of a:

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a

Double displacement reaction

b

Displacement reaction

c

Combination reaction

d

Decomposition reaction

answer is D.

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Detailed Solution

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{Fe}_{2} O_{3} + 2 Al \to {Al}_{2} O_{3} + 2 Fe

is a displacement reaction.
In the given chemical equation,

{Fe}_{2} O_{3} + 2 Al \to {Al}_{2} O_{3} + 2 Fe

A displacement reaction is taking place. This is because aluminium is more reactive than iron and hence it is able to displace it. This results in the formation of aluminium oxide.
A displacement reaction occurs when an atom or group of atoms in a molecule are replaced by another atom. The general equation for a displacement reaction is,

A + BC \to B + AC

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