Year 9 Science: Food Testing

What chemical do you add to a food sample in order to test for the presence of starch (complex sugars)?

• Benedict's solution

• Iodine

• Ethanol

• Biuret solution

What chemical do you add to a food sample in order to test for the presence of Sugars (Glucose or simple sugars)?

• Benedict's solution

• Iodine

• Ethanol

• Biuret solution

What chemical do you add to a food sample in order to test for the presence of Protein?

• Benedict's solution

• Iodine

• Ethanol

• Biuret solution

What chemical do you add to a food sample in order to test for the presence of lipids & fats?

• Benedict's solution

• Iodine

• Ethanol

• Biuret solution

What is a positive test for Starch?

• The solution turns purple

• The solution appears cloudy/white

• The solution turns blue/black

• The solution turns brick red

What is a positive test for Sugars (Glucose or simple sugars)?

• The solution turns purple

• The solution appears cloudy/white

• The solution turns blue/black

• The solution turns brick red

What is a positive test for Protein?

• The solution turns purple

• The solution appears cloudy/white

• The solution turns blue/black

• The solution turns brick red

What is a positive test for lipids & fats?

• The solution turns purple

• The solution appears cloudy/white

• The solution turns blue/black

• The solution turns brick red

Which food test requires heating the solution in a water bath?

• Starch

• Sugars (glucose)

• Protein

• Fats & lipids

Which two food tests indicated negative tests when the solution remains blue?

• Starch

• Sugars (glucose)

• Protein

• Fats & lipids