Question

starch gives blue color in iodine but not cellulose.Why? ​

Answer 1

Answer:

cellulose to be a straight polymer therefore, it can't coil around iodine to produce blue color as starch does

Explanation:

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Answer 2

Answer:

cellulose is derived from D-glucose units, which condensed through beta(1->4)-glycosidic bond. This give cellulose to be a straight polymer therefore, it can't coil around iodine to produce blue color as starch does. ... Ablue-black colour indicates the presence of starch as a starch-polyiodide complex is formed.