Food Tests

Question 1

Test for Starch

Answer 1

Iodine Solution ((Brown—>Blue/Black))

Question 2

Test for Reducing Sugars

Answer 2

Benedict’s solution (10 min heat) (Blue—>Brick red strong positive)

Question 3

Test for Non-Reducing Sugars

Answer 3

1. Boil w/ HCl

2. Benedict’s solution (10 min heat) (Blue—>Brick red strong positive)

Question 4

Test for lipids

Answer 4

Emulsion test (ethanol + H2O) - White precipitate layer

Question 5

Test for Proteins

Answer 5

1. Biuret’s solution - (blue —-> purple)