Justify that the reactions is redox reactions:

Solution:

In the above response,
Oxidation no. of Fe and in is and separately.
Oxidation no. of and 0 in is and individually.
Oxidation no. of Fe is 0 .
Oxidation no. of and in is and individually.
The oxidation no. of Fe diminished from in to 0 in . That is is decreased to .
The oxidation no. of expanded from 0 to in to in . That is is oxidized to .
In this way, the response is redox response.