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Q. Which of the following dissolves in water but does not give any oxyacid solution

The p-Block Elements - Part2

Solution:

$OF_2$ dissolves in water but does not give any oxyacid solution. While $SO_2, SCl_4$ and $SO_3$ give oxyacid solution in water.
$ SO_2 + H_2O \rightarrow\underset{\text{ Sulphurous acid }}{ H_2SO_3 }$
$ SCl_4 + 3H_2O \rightarrow \underset{\text{ Sulphurous acid }}{ H_2SO_3 } + 4HCl$
$ SO_2 + H_2O \underset{\text{ Sulphurous acid }}{ H_2SO_4 }$