Nutritional Scientist Lab
Test food samples for Carbohydrates, Proteins, and Fats
Activity 1: Testing for Starch
Starch is a complex carbohydrate. Use Iodine solution to test the potato.
The potato turned Blue-Black! This indicates the presence of starch.
Activity 2: Testing for Protein
Add Copper Sulphate and Caustic Soda to the mashed food sample.
The solution turned Violet! This confirms Protein is present.
Activity 3: Testing for Fats
Wrap a food item (like a peanut) in paper and crush it. Look for an oily patch.
An oily, translucent patch appeared! This indicates the presence of Fats.
Activity 4: Create a Balanced Diet
A balanced diet contains all nutrients in right quantities. Click to add components:
🎉 Excellent! You've built a healthy, balanced meal!
NCERT Virtual Science Lab
Chapter 2: Components of Food
Test for Starch
Take a small quantity of food item (raw potato). Add 2-3 drops of dilute Iodine solution.
Test for Protein
1. Make a paste of the food item (dal).
2. Add 2 drops of Copper Sulphate and 10 drops of Caustic Soda.
Test for Fats
Take a small quantity of food. Wrap it in a piece of paper and crush it. Take care that the paper does not tear.
Nutrient Testing Summary
| Nutrient | Reagent Used | Positive Color |
|---|---|---|
| Starch | Iodine Solution | Blue-Black |
| Protein | Copper Sulphate + Caustic Soda | Violet |
| Fats | Paper | Oily Patch |
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