What does the following reaction of glucose with HI elucidates about the structure of glucose?

Shows the presence of six carbons linked linearly.

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Shows the presence of

C = O

group.

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Shows the presence of ring structure of glucose.

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Shows the presence of

- C H O

group.

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Solution

The correct option is A Shows the presence of six carbons linked linearly.
On prolonged heating with red P & HI, it forms n-Hexane, suggesting that all the six carbon atoms are linked in a straight chain.

This confirms the presence of 6 carbon linked linearly in glucose. Hence option (c) is correct.

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Similar questions

Q. Answer the following questions.

(i) Deficiency of which vitamin causes night-blindness?

(ii) Name the base that is found in nucleotide of RNA only.

(iii) Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?

Which of the following reactions of glucose can be explained only by its cyclic structure?
(a) Glucose forms pentaacetate
(b) Blucose reacts with hydoxylamine to form an oxime
(c) Pentaacetate of glucose does not reach with hydroxyl amine
(d) Glucose is oxidised by nitric acid to gluconic acid

Write the reactions of D-glucose which can't be explained by its open chain structure. How can cyclic structure of glucose explain these reactions?

What does the following reaction shows about the structure of glucose?

Q. The structure of D-glucose is as follows:

a. Draw the structure of L-glucose.
b. Give the reaction of L-glucose with Tollens reagent.

(IIT-JEE, 2004)

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Glucose

Standard XII Chemistry

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