Question

Test for Starch:
Preparation of dilute iodine solution

Take a test tube or a cup and add few drops of iodine crystals to it. Then dilute it with water till it becomes light yellow/brown.

Take a sample of food item in the test tube. Add a few drops of dilute iodine solution to the sample.

Observe the change in colour. What do you find?

If the substance turns dark-blue or black it contains starch. Try with ripen banana and curry banana.

I want Lab Activity for this topic Test for strach

Materials required =
Precautions =
Procedure =
Observation =
Reference =
Diagram =
Please can you help me in this Lab activity.
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Answer 1

Answer:

Aim - Testing for starch : Preparation of dilute iodine solution.

Material Required - Test tube / cup , iodine crystals , sample of food item - peeled potato

Procedure -

1. Take a test tube or a cup and add few drops of iodine crystals to it.

2. Then dilute it with water till it becomes light yellow/brown.

3. Take a small piece of peeled potato in the test tube.

4. Add a few drops of dilute iodine solution to it.

Observation - The potato turns dark-blue or black so it contains starch.

Precautions - Handle the iodine solution carefully

see diagram in attachment ....

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Answer 2

Answer:

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