Tests for sugars

IGCSE Double Award specification

Can't remember which colour iodine turns in the presence of glucose? Wait, is iodine even used to test for glucose? Find out if you know the answers here!

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  • Created by: John Leog
  • Created on: 07-05-11 11:37

1. What colour change occurs if glucose is detected?

  • Orange -> yellow
  • Blue -> red or brown
  • Aqua-marine -> deep sea green
  • Red -> green
  • Green -> yellow
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Other questions in this quiz

2. What is used to test for the presence of starch?

  • Iodine solution
  • Glucagon solution
  • Ethanol solution
  • Benedict solution
  • Phenolphthalein

3. What colour change occurs if starch is detected?

  • Pale blue -> colourless
  • Ground-in dirt -> crystal white
  • Orange or yellow -> purple or black
  • Purple or black -> red
  • Brown -> pink

4. What is used to test for the presence of glucose?

  • Ethanol solution
  • Catalase solution
  • Iodine solution
  • Benedict solution
  • Phenolphthalein

5. Starch is a polysaccharide and glucose is a monosaccharide...?

  • True
  • False

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