food tests

Question 1

What is the benedicts test for?

Answer 1

sugars

Question 2

What are the 2 types of sugars?

Answer 2

reducing and non-reducing

Question 3

What is the benedicts test?

Answer 3

1. Prepare a food sample and transfer 5cm cubed into a test tube
2. Prepare a water bath so that its set to 75 degress
3. Add some benedicts solution (10 drops) using a pipette
4. Place the test tube in the water bath for 5 minutes

Question 4

For the benedicts experiment, what would the colour be of the solution if it contains a reducing sugar?

Answer 4

It would go from blue to green, yellow or brick red

Question 5

What test is the iodine solution used for?

Answer 5

Starch

Question 6

What is the iodine experiment?

Answer 6

1. Make a food sample and transfer 5cm cubed of your sample into a test tube
2. Then add a few drops of iodine solution and shake to mix the contents

Question 7

What colour would the solution turn if it contained starch?

Answer 7

It would go from browny orange to blue or blue-black

Question 8

What is the Sudan 3 used to test for?

Answer 8

Lipids

Question 9

What is the Sudan 3 experiment?

Answer 9

The Sudan 3 stain solution stains lipids, if it contains lipids, the mixture will seperate into 2 layers. The top layer would be bright red