Question

I. Choose the correct answer from the given options:
Sudha took a small amount of an unknown food item in a test tube. Then, she added a
few drops of iodine to it. The colour of the unknown food item changes to blue-black.
Chrysalis
Chapter 2
Components of Food
Date:
Guided Practice
1
The change in colour of the food item to blue-black indicates the presence of:
a. Carbohydrates
b. Vitamins
C. Proteins
d. Fats
In an experiment, Radha took small amounts of an unknown food item in a test tube.
Then, she added two drops of copper sulphate solution in the test tube along with a
few drops of caustic soda solution. After a few minutes, the colour of the food item
changed to violet.
2.
In the given experiment, the change in colour of the food item to violet
indicates the
presence of:
a. Fats
b. Proteins
11​

Answer 1

Answer:

1.starch (carbohydrates)

2.iodine

Answer 2

Answer:

Chrysalis.vitamins.fat