JEE Main Chemistry question

Identify the product 'C' in the following series of reactions:

Glucose A B C

(A)Heptanoic acidCorrect
(B)Hexanoic acid
(C)α-methyl caproic acid
(D)None of these

Answer: (A)

Solution

Glucose first adds HCN to its free aldehyde to give a seven-carbon cyanohydrin (A); hydrolysis of the nitrile group then gives the seven-carbon polyhydroxy carboxylic acid (B, a heptonic acid); and treatment with excess HI (a strong reducing/deoxygenating agent, typically with red phosphorus and heat) removes all

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Question ID VK-150778