Food Tests

Question 1

Testing for glucose / reducing sugars

Answer 1

• add Benedict’s reagent
• heat solution in water bath
• brick red colour if glucose present
(Blue if not present)

Question 2

Test for starch

Answer 2

• add drop of iodine
• iodine turns blue-black
(Brown if no starch)

Question 3

Test for proteins

Answer 3

• add Biuret reagent
• turns purple

Question 4

Test for fats

Answer 4

• add ethanol
• add water
• turns cloudy