Question

In the given reaction,
$FeSO _{4}+ KClO _{3} \longrightarrow KCl + Fe _{2}\left( SO _{4}\right)_{3}$
I. $FeSO _{4}$ acts as reducing agent.
II. $KClO _{3}$ is reduced.
III. The change in oxidation number of $Fe$ is $2$ .
IV. The change in oxidation number of $Cl$ is $-6$.
Which of the above statements is/are correct?

• A. $I$ and $III$
• B. $II$ and $III$
• C. $I, II$ and $IV$
• D. All of these

Answer 1

Answer: (C)

Statement I, II and IV are correct, while the statement III is incorrect.
It's correct form is as follows :
$\overset{+2}{Fe}\overset{-2}{SO _{4}}+ K\overset{+5}{Cl}O _{3} \longrightarrow \overset{-1}{KCl}+ \overset{+3}{Fe _{2}}\left( SO _{4}\right)_{3}^{-2}$
The change in oxidation state of $Fe =3-2=1$