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  4. Glucose forms many derivatives- The derivative which will help to prove the furanose structure is

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Q. Glucose forms many derivatives- The derivative which will help to prove the furanose structure is

ManipalManipal 2009Biomolecules

Solution:

Formation of isopropylidene derivative requires the presence of two adjacent free $ -OH $ groups in cis-orientation which is present only in the furanose form and hence, isopropylidene formation proves the presence of furanose form.