What are the tests for carbohydrates, starch, proteins, and amino acids?

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Here are the observations and inferences for each test: l — l — l Test & Observation & Inference 1. Put 1 spatular of the Sample in a watch glass, add few drops of concentrated H₂SO₄. Warm gently for a while. & Black residue forms. & Presence of carbohydrates. 2. Add a few drops of distilled water to the solid Sample and boil. & Sample dissolves (or partially dissolves) to form a solution. & Sample is soluble in hot water. 3. To 2 cm³ of Solution of Sample in a test tube, add few drops of Iodine Solution. & Blue−black coloration. & Presence of starch. 4. Fehling's test (Benedict's test) − To 2 cm³ of Solution of Sample in test tube, add 2 cm³ of Fehling's Solution and heat for a while. & Brick−red precipitate forms. & Presence of reducing sugars. 3|c|TEST FOR PROTEINS AND AMINO ACIDS 5. Biuret Test − To 2 cm³ of solution of Sample in a test tube, add a few drops of dilute NaOH followed by few drops of CuSO₄ solution. & Violet/purple coloration. & Presence of proteins (peptide bonds). 6. Millon's Test − Add few drops of Millon's reagent to the solution of the sample and warm the mixture. & Red precipitate forms. & Presence of proteins containing tyrosine.

What are the tests for carbohydrates, starch, proteins, and amino acids?

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