food tests

Question 1

What is the test to detect sugars?

Answer 1

Benedict’s test

Question 2

What is Benedict’s test for?

Answer 2

sugars

Question 3

How do you do the Benedict’s test?

Answer 3

• Add Benedict’s solution to food
• Heat in water bath
• Hazard: Benedict’s solution is an irritant

Question 4

What is the colour change for Benedict’s test?

Answer 4

Blue to brick red

Question 5

What is the test for starch?

Answer 5

Iodine test

Question 6

What is the iodine test for?

Answer 6

Starch

Question 7

How do you do the iodine test?

Answer 7

• Add iodine solution to the food

- Hazard: iodine solution is an irritant

Question 8

What is the colour change for Iodine test?

Answer 8

Brown to blue

Question 9

What is the test for proteins?

Answer 9

Biuret test

Question 10

What is the Biuret test for?

Answer 10

Proteins

Question 11

How do you do the Biuret test?

Answer 11

• Put food sample in test tube with some water

- Add Biuret solution and shake

Question 12

What is the colour change for Biuret test?

Answer 12

Blue to purple

Question 13

What is the test for lipids?

Answer 13

Sudan III test

Question 14

What is the Sudan III test for?

Answer 14

lipids

Question 15

How do you do the Sudan III test?

Answer 15

• Add equal amounts of food and water
• Add drops of Sudan III
• shake

Question 16

What is the colour change for Sudan III test?

Answer 16

red layer forms on top