JEE Main Chemistry question

[Guj CET 2009] Which compound is obtained when glucose reacts with excess ?

(A)GlucosazoneCorrect
(B)Gluconic acid
(C)Glucose phenyl hydrazone
(D)Saccharic acid

Answer: (A)

Solution

With one equivalent of phenylhydrazine, glucose forms a simple phenylhydrazone at C1, but with an excess of phenylhydrazine the reaction proceeds further to oxidise C2 and form the characteristic yellow bis-hydrazone known as glucosazone. Gluconic acid (mild

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Question ID VK-150602