Question

Solution used for testing starch

Answer 1

Answer:

iodine solution

We can use iodine solution to test for the presence of starch. If starch is present is a food item, it turns blue-black colour when iodine solution is added to it.

Answer 2

Answer:

Test for Starch in Plants Source

Test-for-the-presence-of-starch

Materials Required

Knife

Spatula

Porcelain tile.

Iodine solution

Food sample – Potato or any other vegetables or fruits.

Procedure

Take a fresh Potato which is washed, cleaned and dried.

Peel off the skin of the potato.

Cut the potato into small cubes or slices.

With the help of clean and dried Spatula, place the potato samples on the clean and dried porcelain tile.

Add 2 to 3 drops of dilute iodine solution on the potato samples.

Keep the slide undisturbed and observe the changes.

Observations

There will be a change in colour. A blue-black colour develops on the slice or cubes of the potato samples.

Result

The result is positive.

According to the observation the food sample or the potato slice turned to blue-black on adding the iodine solution. This proves the presence of starch in the given plant source.

This was a simple experiment which is used to check for the presence of starch. This Iodine Test for Starch can be performed for both the liquid and solid food samples