Biochemical tests

• Reducing sugars

  Benedict's reagent

  Heat

  Positive result = red/orange precipitate
• Non-reducing sugars

  Acidify with HCl

  Heat

  Neutralise with odium hydrogen carbonate

  Benedict's reagent

  Heat

  
  

  Positive test = red/orange precipitate
• Starch

  Iodine in potassium iodide solution

  Positive test = blue/black
• Proteins

  NaOH

  Copper (II) sulfate

  Positive test = purple
• Lipids

  Ethanol

  Water

  Shake

  Positive test = cloudy white