Question

starch gives blue color in iodine but not cellulose why?​

Answer 1

Explanation:

Starch is made up of two component- amylose and amylopectin. Amylopectin is the component which is responsible for the blue colour of the starch with iodine. All glucose polymers does not contain amylopectin. That is why cellulose, though being a polymer of glucose, does not give blue colour with iodine solution.

Answer 2

Starch is made up of two component- amylose and amylopectin. Amylopectin is the component which is responsible for the blue colour of the starch with iodine. All glucose polymers does not contain amylopectin. That is why cellulose, though being a polymer of glucose, does not give blue colour with iodine solution.