- Books Name
- CBSE Class 6 Science Book
- Publication
- Param Publication
- Course
- CBSE Class 6
- Subject
- Science
Test For Carbohydrates, Fats & Proteins
(a) Test for carbohydrates :
Take few drops of iodine solution & add it into boiled rice or potato. The formation of blue-black colour confirms the presence of starch (carbohydrate).
(b) Test for fats :
When ghee / butter rubbed on white paper, that portion of paper turns translucent indicating the presence of fats.
(c) Test for proteins :
Take the few drops of egg albumin in a test tube and add a few drops of concentrated nitric acid to it.
• The white colour of the albumin changes to yellow. Now, pour the acid out of the test tube but keep the white of the egg in the test tube.
• Add a few drops of ammonium hydroxide to it.
• The colour changes to violet which shows the presence of proteins.