Food tests

Question 1

What is the Benedict’s test and how do you carry it out?

Answer 1

For testing, if there is sugar in food samples.
Add Benedict’s reagent (blue liquid) leave in a hot water bath for 5 minutes, if it turns orange/brick red, it contains sugar.

Question 2

What is the Biuret test and how do you carry it out?

Answer 2

For testing, if there is protein in food samples.

Add Biuret reagent (blue liquid). If it turns lilac, protein is present.

Question 3

Which food test can be carried out with iodine?

Answer 3

Testing for the presence of starch. 
Add iodine (reddish brown) drops to food sample. If it turns blue/black, it contains starch.