The correct statements about iron include:

CHEMISTRY · Single correct · CBSE · Chemistry · d- and f-Block Elements · d- and f-Block Elements

Problem

The correct statements about iron include: (i) the highest oxidation state of iron is

+6

\mathrm{K_2FeO_4}

; (ii) iron shows the

+2

oxidation state with six electrons in the

3d

orbitals; (iii) the common

+3

oxidation state of iron has five unpaired electrons in the

3d

orbitals. (1) I, II, III (2) I, II (3) II, III (4) I only