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Which of the following statements is incorrect with respect to starch?

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in Chemistry – Class 12 by (188k points)
Which of the following statements is incorrect with respect to starch?

(a) It is a reducing carbohydrate

(b) It is a polymer of α-D-glucose

(c) It gives blue colour with iodine

(d) It consists of branched chains

The question was posed to me during a job interview.

Asked question is from Biomolecules Carbohydrates topic in chapter Biomolecules of Chemistry – Class 12

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Right choice is (a) It is a reducing carbohydrate

For explanation I would say: Starch is a non-reducing saccharide as it does not reduce Fehling’s solution or Tollen’s reagent. This indicates that all hemiacetal hydroxyl groups of glucose units are not free nut are linked by glycosidic bonds.

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