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  • Which of the following reactions of glucose can be explained only by its cyclic structure?Option: 1 Glucose forms Pentaacetate<div clas

Which of the following reactions of glucose can be explained only by its cyclic structure?

Option: 1

Glucose forms Pentaacetate


Option: 2

Glucose reacts with hydroxylamines to form an oxime


Option: 3

Pentaacetate of glucose does not react with hydroxylamines


Option: 4

Glucose is oxidised by nitric acid to gluconic acid


Answers (1)

best_answer

As we have learnt, 

Evidence for Ring Structure of Glucose -
  1. Glucose does not react with sodium bisulphite. It confirms the absence of -CHO group.
  2. Glucose does not give Schiff's test and DNP test. It confimrs the absence of -CHO group.
  3. Glusoce pentaacetate does not react with hydroxylamine. It means absence of -CHO group.

The pentaacetate of glucose does not react with hydroxylamine indicating the absence of free -CHO group. This property of glucose can be explained only by its cyclic structure.

Therefore, (3) option is correct.

Posted by

sudhir.kumar

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