Food tests

Question 1

Sugars are tested with…

Answer 1

Benedict’s solution

Question 2

The process of testing sugars

Answer 2

1. Prepare food samples and place
   5cm3 in a test tube
2. Prepare a water bath to a temperature of 75 degrees
3. Add The benedict solution to the test tubes
4. Place the test tube in the water and wait.

Question 3

If sugar is present

Answer 3

Color will change from blue to either yellow, green, or brick red depending on the concentration of sugar.

Question 4

Starch is tested with…

Answer 4

Iodine solution

Question 5

Process of testing for starch

Answer 5

1. Prepare the food sample and add 5cm3 of it to a test tube
2. Add the solution to the test tube and gently shake until incorporated.

Question 6

If starch is present

Answer 6

The color of the solution goes from orangy-brown to blue- black.

Question 7

Proteins are tested with…

Answer 7

Biuret’s solution

Question 8

Process of testing proteins

Answer 8

1. Prepare a food sample and add 2cm3 to a test tube
2. Add the biuret solution and gently shake

Question 9

If the proteins are present

Answer 9

The color will change from blue to purple

Question 10

Lipids are tested with…

Answer 10

Sudan stain III

Question 11

Process of testing lipids

Answer 11

1. Prepare a food sample and add 5cm3 to a test tube
2. Add 3 drops of the solution and gently shake

Question 12

If fats are present..

Answer 12

The solution will separate and the top layer will turn red.