Question

Among Al₂O₃ , SiO₂ , P₂O₃ and SO₂ the correct order of acid strength is
(a) SO₂ < P₂O₃ < SiO₂ < Al₂O₃
(b) SiO₂ < SO₂ < Al₂O₃ < P₂O₃
(c) Al₂O₃ < SiO₂ < SO₂ < P₂O₃
(d) Al₂O₃ < SiO₂ < P₂O₃ < SO₂.

Answer 1

Correct Option(d) Al₂O₃ < SiO₂ < P₂O₃ < SO₂

Explanation:

While moving along a group from top to bottom, acidic nature of oxides decreases and along a period from left to right, acidic nature increases.