Write such reactions and facts about glucose which cannot be explained

1.	Write such reactions and facts about glucose which cannot be explained by open chain structure
Answer» The following facts and reactions cannot be explained by open chain structure of glucose. (i) Despite having the aldehyde group, glucose does not give 2, 4-DNP test, Shiff’s test and it does not form the hydrogen sulphite addition product with NaHSO₃. (ii) The penta-acetate of glucose does not react with hydroxylamine indicating the absence of free aldehydic group.

Write such reactions and facts about glucose which cannot be explained by open chain structure

Answer»

The following facts and reactions cannot be explained by open chain structure of glucose.
(i) Despite having the aldehyde group, glucose does not give 2, 4-DNP test, Shiff’s test and it does not form the hydrogen sulphite addition product with NaHSO₃.

(ii) The penta-acetate of glucose does not react with hydroxylamine indicating the absence of free aldehydic group.

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Write such reactions and facts about glucose which cannot be explained by open chain structure

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