1.

Why starch produce blue colour with iodine but cellulose can not?

Answer» Cellulose is derived feom O- glucose units, which condensed through beta (1->4) - glycosidic bond. This give cellulose to be a straight polymer therefore, it cannot coil around iodine to produce blue color as starch does.
Coz starch has helixes which can hold I² but cellulose doeanot have helixes


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