Question

Total number of electrons involved in the following change is six.
$2Al+F{e}_2{O}_3\to A{l}_2{O}_3+2Fe$
If true enter 1, else enter 0.

• A. 1

Answer 1

The correct option is A 1
The total number of electrons involved in the reaction $2Al+F{e}_2{O}_3\to A{l}_2{O}_3+2Fe$ is $6$.
The oxidation number of $Al$ changes from $0$ (in $Al$) to $+3$ (in $A{l}_2{O}_3$).
The net change in the oxidation number per $Al$ is $3$.
Total change in the oxidation number is $6$.
Hence, $6$ electrons are required.