Engineering
Chemistry
Carbohydrate
Qualitative analysis of organic compounds
Functional group tests
Question
Iodine gives blue colour with :
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Solution
Iodine gives a blue colour with starch.
The iodine test is used to test for the presence of starch. Starch turns into an intense "blue-black" colour upon addition of aqueous solutions of the triiodide anion, due to the formation of an intermolecular charge-transfer complex.
