Question

The oxoacid of sulphur which contains two sulphur atoms in different oxidation states is:

A
pyrosulphurous acid
B
hyposulphurous acid
C
pyrosulphuric acid
D
persulphuric acid
Solution
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The oxidation states of two S atoms in pyrosulphurous acid are different i.e. +3 and +5 state.

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