Question:

Choose the incorrect formula out of the four compounds for an element X below: X₂O₃, X₂(SO₄)₃, XPO₄, X₂Cl₃

X₂O₃

X₂(SO₄)₃

XPO₄

X₂Cl₃

In the given compounds, the element X shows the oxidation state +3. Hence, the formula X₂Cl₃ is incorrect.