The reaction of glucose with hydrogen cyanide confirms the ______(a) straight chain structure of glucose(b) presence of a carbonyl group in glucose(c) presence of an aldehyde group in glucose(d) presence of a keto group in glucoseThe question was asked in an internship interview.My enquiry is from Biomolecules Carbohydrates topic in chapter Biomolecules of Chemistry – Class 12

The reaction of glucose with hydrogen cyanide confirms the ______(a) s

1.	The reaction of glucose with hydrogen cyanide confirms the ______(a) straight chain structure of glucose(b) presence of a carbonyl group in glucose(c) presence of an aldehyde group in glucose(d) presence of a keto group in glucoseThe question was asked in an internship interview.My enquiry is from Biomolecules Carbohydrates topic in chapter Biomolecules of Chemistry – Class 12
Answer» Right CHOICE is (B) presence of a CARBONYL group in glucose To elaborate: Glucose reacts with hydrogen cyanide to form glucose cyanohydrin, where the carbonyl double bond GETS cleaved to form one C-OH bond and one C-CN bond. This indicates the presence of a carbonyl group but does not confirm whether it is an ALDEHYDIC or a keto group.

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