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Glycogen

Starch gives ...

Question

Starch gives blue colour with $I_{2}$ .

A

True

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B

False

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Solution

The correct option is A True
Amylose in starch is responsible for the formation of deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil.

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Similar questions

Q. Which of the following gives blue colour with starch solution?

On treatment with iodine, the presence of starch gives blue-black colour because

Q. Rice is a rich source of starch and iodine gives blue black colour with starch. If you add iodine solution to chewed rice what colour will it give?

Q. Which of the following statement(s) is/are correct?
I. Starch is almost insoluble in cold water but relatively more soluble in boiling water.
II. Starch solution gives blue colour with

I_{2}

solution in cold.
III. Starch is a reducing sugar.
IV. Starch forms osazone.

STATEMENT-1 : Amylopectin gives blue colour with

I_{2}

solution.
STATEMENT-2 : Amylopectin is insoluble in water.

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