Which formula is a chloride compound?

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Multiple Choice

Which formula is a chloride compound?

Explanation:
A chloride compound is a salt that contains the chloride ion, Cl−. In the formula NH4Cl, the ammonium cation NH4+ is paired with the chloride anion Cl−, forming ammonium chloride. That shows the presence of the chloride ion in the compound. The other formulas correspond to different anions: CuSO4 contains sulfate (SO4^2−), Fe2O3 is an oxide, and KNO3 contains nitrate (NO3−). So the one with chloride is the ammonium chloride formula.

A chloride compound is a salt that contains the chloride ion, Cl−. In the formula NH4Cl, the ammonium cation NH4+ is paired with the chloride anion Cl−, forming ammonium chloride. That shows the presence of the chloride ion in the compound.

The other formulas correspond to different anions: CuSO4 contains sulfate (SO4^2−), Fe2O3 is an oxide, and KNO3 contains nitrate (NO3−). So the one with chloride is the ammonium chloride formula.

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