Question

Fe2O3+2Al=Al2O3+2Fe is a redox reaction.Justify

Answer 1

yes it is a redox reaction. because aluminium is getting oxidise to aluminum oxide and iron oxide is getting reduced to iron.
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Answer 2

Answer: $Fe_2O_3+2Al\rightarrow Al_2O_3+2Fe$

Redox reaction is one in which oxidation and reduction takes place simultaneously.

Oxidation is a process in which electrons are lost and thus the oxidation number of the element increases.

Reduction is a process in which electrons are gained and thus the oxidation number of the element decreases.

In the given reaction, Fe is in oxidation state of +3 in $Fe_2O_3$ and changes to Fe in zero oxidation state, thus gets reduced.

Al is in zero oxidation state and converts to +3 oxidation state in $Al_2O_3$