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reaction of sulfuric acid and sugar

the guy
in Chemistry

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when you do the classic experiment adding sufuric acid to sugar and you get a black mass of carbon and water, what happens to the sulfur in the acid?

Why would anything happen to that? If you expected a redox reaction to take place, you are somewhat mistaken. The only thing that happens is that water is figuratively sucked out of the sugar.

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so it remains as sulfuric acid then?

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why does it do that?

Concentrated sulfuric acid is amazingly hygroscopic.

True that it's hygroscopic; but it should also be dehydrating to draw water out from carbohydrates.

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