1. Tardigrade
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  3. Chemistry
  4. Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is.........

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Q. Iron sulphide is heated in air to form $A,$ an oxide of sulphur. $A$ is dissolved in water to give an acid. The basicity of this acid is.........

The p-Block Elements - Part2

Solution:

$4 FeS _{2}+11 O _{2} \longrightarrow 2 Fe _{2} O _{3}+ \underset{(A)}{8 SO _{2}}$

$\underset{(A)}{SO _{2}}+ H _{2} O \longrightarrow \underset{\text{(Acid)}}{ H _{2} SO _{3}} \rightleftharpoons 2 H ^{+}+ SO _{3}^{2-}$

Hence basicity of acid, $H _{2} SO _{3}$ is two.