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Principle of Molisch’s test: H2SO4 get dehydrated to form furfural and its derivatives. When monosaccharide are treated with conc H2SO4 or conc HCl, -OH group of sugar are removed in the form of water and furfural is formed from pentose sugar and hydroxymethyl furfural is formed from hexose sugar. HowRead More →

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Molisch’s Test: This is a common test for all carbohydrates larger than tetroses. The test is on the basis that pentoses and hexoses are dehydrated by conc. Sulphuric acid to form furfural or hydroxyl methyl furfural, respectively. These products condense with α-naphthol to form purple condensation product. What Colour changeRead More →