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Question
Which of the following statements is not true about glucose?
Options
It is an aldohexose.
On heating with HI, it forms n-hexane.
It exists in furanose form.
It does not give Schiff’s test.
MCQ
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Solution
It does not give Schiff’s test.
Explanation:
Glucose does not pass Schiff’s test due to the presence of an aldehyde group in its open structure, but instead forms a cyclic structure. Schiff’s reagent, although being a weak base, does not break down this stable structure. Glucose appears in both pyranose and furanose structures.
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