Food Tests

Question 1

Food test for Starch

Answer 1

Originally clear

1. Add a few drops of starch solution
2. Add several drops of iodine

If Starch is present the solution turns blue black

Question 2

Food test for Sugar

Answer 2

Originally blue

1. Add 2cm (cubed) of glucose solution
2. Add 2cm (cubed) of Benedict’s solution
3. Place in boiling water and leave for approximately 5 mins

If present turns orange or red

Question 3

Food test for protein

Answer 3

Originally clear
1. Add 2cm (cubed) of protein solution)
2. Add 2cm (cubed) of sodium hydroxide solution
3. Add a couple of drops of copper sulphate solution, and shake
This should make the solution blue

If present turns violet

Question 4

Food test for Lipid/fats

Answer 4

Originally a little bit yellow

1. Add 2cm (cubed) oil
2. Add 2cm (cubed) ethanol and shake

If present becomes cloudy

Question 5

What is the name of the main solution used for testing for protein?

Answer 5

Biurets Solution

Question 6

What is the name of the main solution used for testing for lipid/fats?

Answer 6

Ethanol and water

Question 7

What is the name of the main solution used for testing for sugar?

Answer 7

Benedict’s solution

Question 8

What is the name of the main solution used for testing for starch?

Answer 8

Iodine