what are the reagent and color change of test of carbohydrates like glucose, sucrose and lactose with the following test; picric acid test, methylene blue test, potassium permanganate test and phosphomolybdic acid test
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Step 1
- Procedure: Mix the carbohydrate solution with picric acid and heat the mixture. - Color Change: A red or reddish-brown color indicates the presence of reducing sugars like glucose and lactose. Sucrose, being a non-reducing sugar, will not show a color Show more…
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Given Test Reagent Positive or Negative Result Reason/Explanation Lime Soda Molisch Test Positive Sucrose Fehling's Test Negative It's a reducing sugar Fructose Tollen's Test Positive Galactose Nylander's Test Cellobiose lodine Test Glucose Seliwanoff's Test Ribose Bial's Orcinol Test Maltose Benedict's Test Milk Molisch Test Cellulose lodine Test Blue-black solution. It's a carbohydrate
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can be differentiated by (A) Tollen's reagent test (B) Fehling solution test (C) $\mathrm{NaHSO}_{3}$ test (D) $\mathrm{NaHCO}_{3}$ test
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Benedict's test is a classic test for some sugars. In this test, an aldehyde is oxidized to a carboxylic acid, and a color change occurs. Which mono- and disaccharide that you have studied would give a positive Benedict's test?
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