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Give reason for the following : Sugar ...

Give reason for the following :
Sugar gets charred on addition of concentrated sulphuric acid.

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Conc. `H_2SO_4` is dehydrating agent. Sugar gets dehydrated and sugar charcoal is obtained which is of black colour.
`underset("Sucrose")(C_(12)H_(22)O_(11)) overset( Conc. H_2SO_4) to underset("Sugar charcoal ")(12C) + underset("Water ")(11H_2O)`
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