Can sulfuric acid be decomposed by chemical change?
The sulfur in sulfate is fully oxidized..........
The sulfur in sulfate is fully oxidized..........i.e.
And in fact there are sulfate reducing bacteria, which reduce sulfate to sulfide; the clever little blighters.
It is quite sobering to think that this reaction may have been performed by the earliest micro-organisms, 3-400 hundred million years ago.