Procedure Food groups
Observation
Inference
lodine test
ins beli
Test for starch
i. Add 2mL of iodine solution to the 1%
starch solution in a test tube.
ii. Heat the above solution after making
observation in step i.
Test for lipids
Add 2mL of oil to 2mL of water in a test
tube. Add few drops of Sudan III and
shake it.
Biuret test
atic vess
Test for
proteins
Add 2mL of protein solution (which is an
extract of pulses, or egg albumin or milk)
and 2mL of Biuret reagent.
Questions
i. Name any two plant tissues that can be used to demonstrate the presence of protein.
ii. Identify one confirmatory test for the protein.
ii. Write any two precautions that you will take while conducting the test for starch.
iv. Explain the significance of this experiment in our daily life.
V. Design another method to test for the presence of lipids in food.