Question

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

Answer 1

Answer:

the answer is c as per the question

Answer 2

(d) Al2O3 < SiO2 < P2O3 < SO2

Explanation:

Acidity of the oxides of non-metals increases with the electronegativity and oxidation number of the element.

Al2O3 is amphoteric. SiO2 is slightly acidic whereas P2O3 and SO2 are the anhydrides of the acids H3PO3 and H2SO3.

Al2O3 < SiO2 < P2O3 < SO2

Option D is the answer.