Food tests

Question 1

reducing sugar

Answer 1

benedict’s solution
initial colour: blue
colour after positive result: brick red

Question 2

starch

Answer 2

iodine
initial colour: yellow - brown
colour after positive result: blue black

Question 3

protein / amino acids

Answer 3

biuret solution
initial colour: blue
colour after positive result: lilac / purple

Question 4

fat

Answer 4

ethanol
initial colour: colourless
colour after positive result: white emulation