J ea carbohydrate and the time required for a positive tost: 1 xylosent pink 3.

Question

J ea carbohydrate and the time required for a positive tost: 1 xylosent pink 3. fructose au put pie 5. starch 2. glucose 4. sucrose Purpic 6. control PurPIe Clear Which carbohydrates gave a positive test? Did any carbohydrate(s) require an extended time to give a positive test? 2 lodine Test Record the color produced by each carbohydrate: 1. xylose 2 glucose 4. starch 5. glycogen 6. amyloso 7. amylopectin 8. cellulose 9. control 3. sucrose Which carbohydrate(s) gave a positive iodine test? Which of these are polysaccharides?

Explanation / Answer

Iodine test is for identification of polysaccharide carbohydrates as iodine forms a complex with polysaccharide chain of carbohydrates which is visible to eyes as a blue-black color

Carbohydrates which give positive test for Iodine test are

Only these three carbohydrates give positive iodine test and hence only these three are polysaccharides

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