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What is the action of concentrated sulphuric acid on sugar?

April 26, 2017acid Action Concentrated sugar sulphuric

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What is the action of concentrated sulphuric acid on sugar?

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On adding concentrated H2SO4, the white crystals of sugar gradually change first to yellowish brown, then to brown and finally to black colour. The acid dehydrates the sugar to a black mass of carbon. Conc. H2SO4 is a good dehydrating agent.