Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid s…

Chemistry Classification of Elements and Periodicity Valency and Oxidation State Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is :

SO2< P2O3<SiO2< Al2O3

SiO2< SO2< Al2O3< P2O3

Al2O3<SiO2< SO2< P2O3

Al2O3<SiO2< P2O3< SO2

Text Solution

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The correct answer is:

On moving left to right in a period, electronegativity increases. So non-metallic character increases.Thus, acidic strength of oxides increases and basic strength decreases.

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