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The Iodine Test

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Questions and Answers

What is the primary objective of the iodine test?

To distinguish between monosaccharides and disaccharides

To indicate the presence of glucose made by plants in the leaves

To detect the presence of polysaccharides, primarily starch (correct)

To detect the presence of amylopectin

Which polysaccharide would produce a black color in the iodine test?

Amylopectin

Glycogen

Dextrin (correct)

Cellulose

What reagent is used in the iodine test?

Lugol’s iodine (correct)

Elemental iodine

Potassium iodide

Triiodide ion

What color does amylase produce in the iodine test?

<p>Blue-black</p> Signup and view all the answers

According to the principle of the iodine test, what is the key to this test?

<p>The helix structure of the glucose chain</p> Signup and view all the answers

Study Notes

What is the primary objective of the iodine test? Which polysaccharide would produce a black color in the iodine test? What reagent is used in the iodine test? What color does amylase produce in the iodine test? According to the principle of the iodine test, what is the key to this test?

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Description

Test your knowledge of the iodine test for detecting polysaccharides with this quiz. Explore the principles, objectives, and variations of the iodine test, including the starch-iodine test.