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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3rx052

Considering magnetite, $Fe X_{3} O X_{4}$ , as $FeO \cdot Fe X_{2} O X_{3}$ , select the correct statements.

ATwo of the three iron atoms are at $+ 3$
BOne of the three iron atoms is at $+ 2$
CThe average oxidation number of iron is $+ 8/3$
DEach iron atom is at exactly $+ 8/3$

Answer: A, B, C

One

Fe^{2 +}

and two

Fe^{3 +}

give

2 + 6 = 8

for four O at

- 2

. The average is

8/3

but no individual atom has this value, so the last statement is false.

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