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Valency

Which of the ...

Question

Which of the following formulae represent the ions of iron with variable valencies?

Fe³⁺, Fe¹⁺

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Fe²⁺, Fe³⁺

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Fe²⁺, Fe⁴⁺

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Fe²⁺, Fe¹⁺

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Solution

The correct option is B
Fe²⁺, Fe³⁺

Iron has variable valency - Ferrous ion, Iron (II)oxide i.e, Fe²⁺and

Ferric ion, Iron (III)oxide i.e, Fe³⁺

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