Food Tests

Question 1

Benedict’s Solution

Answer 1

Test for Sugars

Changes from blue colour to green, yellow or brick-red if reducing sugars are present

Question 2

Iodine Solution

Answer 2

Test for Starch

Colour changes from brown-orange to black or blue-black if starch is present

Question 3

Biuret Solution

Answer 3

Test for Proteins

Colour changes from blue to pink or purple if proteins are present

Question 4

Sudan III Stain Solution

Answer 4

Test for Lipids

Top layer of mixture will be bright red if lipids are present