Which of these formulae are incorrect-Ferric oxide - Fe-2O-3Ferrous oxide - Fe-2O-3Ferric sulphate - Fe-SO-4-3Ferrous sulphate - FeSO-4

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Chemical Compound

Which of thes...

Question

Which of these formulae are incorrect?

Ferric oxide -

F e_{2} O_{3}

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Ferrous oxide -

F e_{2} O_{3}

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Ferric sulphate -

F e (S O_{4})_{3}

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Ferrous sulphate -

F e S O_{4}

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M_{2} (S O_{4})_{3}

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