Neha took a small lump of a type of food in a test-tube and added 10 drops of water to it. Then she added 2 drops of copper sulphate solution and 10 drops of caustic soda to it. Can you name the component of food that is being tested by her?
Protein
This is the test for the presence of protein in food. Food will give a blue colour if protein is present. Pulses, milk and eggs are good sources of proteins.