Food Testing

Question 1

What reagent is used to test for the presence of starch in food?

Answer 1

Iodine solution

Question 2

What color change indicates a positive test for starch?

Answer 2

Blue-black

Question 3

Which reagent is used to test for the presence of protein in food?

Answer 3

Biuret solution

Question 4

What color change indicates a positive test for protein?

Answer 4

Purple

Question 5

What type of reaction is used to test for starch?

Answer 5

Iodine reacts with starch to form a blue-black complex

Question 6

What type of reaction is used to test for protein?

Answer 6

Biuret solution reacts with protein to form a purple complex

Question 7

What is the purpose of conducting food tests for starch, protein, and fats?

Answer 7

To determine the presence or absence of these macromolecules in food samples

Question 8

What is the test for Fats?

Answer 8

Rub a small dry food sample on some white paper.Hold up the paper in light, a greasy mark is a positive indicator.