JEE Main 2022 · 26 Jul · Shift 1 · Chemistry Q87

ChemistryInteger+4 / -1Question 87 of 90

The amount of charge in F (Faraday) required to obtain one mole of iron from $\mathrm{Fe_3O_4}$ is ______. (Nearest Integer)

Your answer

Answer and worked solution

Official answer: 3

Fe in $\mathrm{Fe_3O_4}$ has average oxidation state $+\frac83$ : $\frac83\approx3$ F per mole (nearest integer).

Answer: 3

JEE Main 2022 · 26 Jul · Shift 1, Chemistry question 87