Iodine test is shown by

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The iodine test is a chemical test used to detect the presence of starch. Starch is a polysaccharide that forms a helical structure,which can trap

Vedclass · Accepted Answer

Starch

Vedclass · Answer

(B) The iodine test is a chemical test used to detect the presence of starch. Starch is a polysaccharide that forms a helical structure,which can trap iodine molecules $(I_2)$ within its coils to form a starch-iodine complex. This complex produces a characteristic deep blue color. When the solution is heated,the helical structure of starch unwinds,releasing the iodine molecules,and the blue color disappears. Upon cooling,the starch molecules re-form their helical structure,trapping the iodine again,and the blue color reappears. Therefore,starch gives a positive iodine test.

Similar Questions

What is the general formula of carbohydrates?

Which of the following is a disaccharide?

State the number of carbon atoms in glyceraldehyde.

Dihydroxyacetone phosphate is an example of ........

The bond present between carbohydrate molecules is known as ...... bond.

Vedclass Test Series

Exam Paper Generator

Online Exam Module