Food Tests

Question 1

What does Iodine solution test for?

Answer 1

Iodine solution tests for starch and goes blue black if starch is present

Question 2

What does Benedict solution test for?

Answer 2

Benedict solution tests for reducing sugars and goes red if reducing sugars are present

Question 3

What does Biuret solution test for?

Answer 3

Biuret solution tests for protein and turns purple if present

Question 4

What does ethanol test for?

Answer 4

Ethanol tests for lipids (emulsion test) and goes milky when lipids are present

Question 5

How to carry out iodine solutions test for starch?

Answer 5

1) Add the iodine solution directly to the substance to be tested and look for colour change. It will go blue black if starch is present

Question 6

How to carry out Benedicts test for reducing sugars?

Answer 6

1) add benedicts to the solution

2) Heat for 2 mins in a water bath at boiling point and look for colour change

Question 7

How to carry out Biuret test for protein?

Answer 7

1) Add biuret to the solution and wait for colour change.

Question 8

How to carry out ethanol test not lipids?

Answer 8

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