Food tests RP

Question 1

What solution is used to test for starch

Answer 1

Iodine

Question 2

What solution is used to test for sugars

Answer 2

Benedict’s with hot water

Question 3

What solution is used to test for protein

Answer 3

Biuret

Question 4

What solution is used to test for lipids

Answer 4

Ethanol

Question 5

What is the positive and negative results for starch

Answer 5

negative - remains orange
positive - blue-black

Question 6

What are positive and negative results for sugars

Answer 6

Negative - stay blue
Positive - brick red

Question 7

What are positive and negative results for protein

Answer 7

Negative - blue
Positive - lilac

Question 8

What are positive and negative results for lipids

Answer 8

Negative - clear
Positive - cloudy layer of emulsion

Question 9

How to create food solution to be tested

Answer 9

Grind food sample and add water to make paste using mortar and pestle
Transfer to beaker and add more water
Stir so chemical dissolve in water
Filter solution to remove suspended particles