Question

FeS is the chemical formula of

• A. Iron Sulphate
• B. Iron(II) sulphide
• C. Iron (II) Sulphite
• D. Iron (III) Sulphide.

Answer 1

The correct option is B

Iron(II) sulphide

Explanation for the correct option:

Option B: Iron (II) Sulphide

• Iron sulfide is a stable compound in which both the combining atoms show a valency of 2.
• Iron gives two electrons to sulfur atoms to combine chemically.
• As a result, there is a formation of stable compound iron(II) sulfide ($\mathrm{FeS}$).
• The roman numeral (II) shows iron has a valency of 2.

Explanation for the incorrect options:

Option A: Iron(II)sulfide

The formula of iron sulfide is${\mathrm{FeSO}}_4$.

The roman numeral (II) represents shows a valency of 2.

Option C: Iron sulfite

The formula of iron sulfite is${\mathrm{FeSO}}_3$.

Option D: Iron (III) Sulphide

The formula of iron (III)Sulphide is ${\mathrm{Fe}}_2{\mathrm{S}}_3$.

The roman numeral (III) represents the valency of iron in a given compound is 3.

Thus Option B is the correct option.