Food tests

Question 1

What is the test for Starch and the result if starch is present?

Answer 1

-iodine solution
-blue/black

Question 2

What is the test for Proteins and the result if protein is present?

Answer 2

-Biuret’s solution
-Purple

Question 3

What is the test for Reducing sugars and the result if sugars are present?

Answer 3

-benedict’s solution
-brick red
-green / yellow / orange in less sugar is present

Question 4

What is the test for lipids and the result if lipids are present?

Answer 4

-Ethanol
-Cloudy / milky

Question 5

how to carry out a test for starch?

Answer 5

Add the iodine solution directly to the substance to be tested and look for a change in colour.

Question 6

How to carry out a test for proteins?

Answer 6

Add Biuret’s to the solution to be tested and look for a change in colour.

Question 7

How to carry out a test for reducing sugars?

Answer 7

1)Add Benedict to the solution to be tested.
2)Heat for two minutes in a water bath at boiling point and look for a change in colour.

Question 8

How to carry out a test for lipids?

Answer 8

1)Add ethanol to the solution to be tested and shake thoroughly.
2) Then add water and look for a change colour.