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Q.
Among $ A{{l}_{2}}{{O}_{3}},Si{{O}_{2}},{{P}_{2}}{{O}_{3}} $ and $ S{{O}_{2}} $ the correct order of acid strength is
BHUBHU 2011
Solution:
With decrease in size from $ Al $ to S, the basic nature of oxide decrease and acidic nature increases. Hence, the order of acid strength is as
$ A{{l}_{2}}{{O}_{3}} < Si{{O}_{2}} < {{P}_{2}}{{O}_{3}} < S{{O}_{2}} $