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What is the test for starch?
iodine
What is the test for glucose?
Benedict’s reagent
What is the test for protein?
biuret’s reagent
What is the test for fats?
Sudan III
What does iodine look like initially?
orange
What does Benedict’s reagent look like initially?
blue-green
What does biuret’s reagent look like initially?
blue
What colour is Sudan III?
red
What does a positive test for starch look like?
iodine turns blue-black
What does a positive test for glucose look like?
Benedict’s reagent turns brick red
What does a positive test for protein look like?
biuret’s reagent turns pink-purple
What does a positive test for fat look like?
Sudan III forms a red line at the top
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