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Which of the following statement is not true for glucose?
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Which of the following statement is not true for glucose?

A
The pentaacetate of glucose does not react with hydroxylamine to give oxime

B
Glucose exists in two crystalline forms and

C
Glucose gives Schiff's test for aldehyde

D
Glucose reacts with hydroxylamine to form oxime

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Updated on: Dec 2, 2022

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New Pattern JEE Problems Chemistry for JEE Main and Advance( Master Problem Package) (Arihant)

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Aldehyde group react with hydroxylamine to give oxime.
Glucose with anomeric hydroxyl group can convert to ring opening structure which contain aldehyde.
Thus, it forms oxime with and its pentaacetate does not react with because its anomeric group is converted into acetate group.
Pyranose structure (Closed ring) is quite stable and is not broken down by Schiff's reagent which is a weak base. Hence, it does not form hydrazone and giving a negative Schiff's test.
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Question Text
Which of the following statement is not true for glucose?
Updated OnDec 2, 2022
TopicBiomolecules
SubjectChemistry
ClassClass 12
Answer TypeText solution:1 Video solution: 1
Upvotes195
Avg. Video Duration11 min