Question

when iodine is added to start test tube what changes do you find in colour​

Answer 1

Answer:

Explanation:

When iodine is added to the test tubes the color of test tube B changes into dark Blue color.

This is due to the presence of starch. Iodine test is used to determine the presence of starch in a solution.

Therefore we can say that solution b contains starch.

Answer 2

Answer:

Saliva contains starch breaking enzyme that is amylase while potato contains starch in it. Therefore when iodine is added in both tube the color of tube B changes to dark blue which indicates the presence of starch while no reaction takes place in tube A which means there is no starch.

Explanation:

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