Exams › JEE Advanced › Chemistry

What is the correct IUPAC name of D-glucose?

1. 2,3,4,5,6-pentahydroxy caproaldehyde
2. 2,3,4,5,6-pentahydroxyhexaldehyde
3. 2,3,4,5,6-pentahydroxyhexanal
4. 1-oxo-2,3,4,5,6-pentahydroxyhexane

Correct answer: 2,3,4,5,6-pentahydroxyhexanal

Solution

Glucose is a hexose with an aldehyde group at position 1 and five hydroxyl groups at positions 2 through 6. IUPAC nomenclature uses 'hexanal' as the parent chain (6 carbons, aldehyde), giving 2,3,4,5,6-pentahydroxyhexanal. 'Hexaldehyde' is a non-IUPAC term and 'caproaldehyde' is a trivial name.

Related JEE Advanced Chemistry questions

• How many phenylhydrazine molecules are required to react with one glucose molecule to form an osazone?
• What is the total number of asymmetric carbon atoms present in a 2-ketohexose molecule?
• Which of the following amino acids contains a secondary (2 degrees) amino group in its structure?
• D-Glucose (an aldohexose with structure CHO-(CHOH)4-CH2OH) is treated with NaBH4. How many optically active isomers of the product are possible?
• A decapeptide has a molecular weight of 796. On complete hydrolysis it yields glycine (molecular weight 75), alanine, and phenylalanine as the only products. If glycine contributes 47.0% of the total weight of all hydrolysis products, how many glycine units are present in the decapeptide?
• How many chiral centres are present in the structure of penicillin G (benzylpenicillin)?

⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →