JEE Main Chemistry question

Glucose and fructose are readily distinguished by using:

(A)Molisch test
(B)Seliwanoff testCorrect
(C)Tollens' reagent
(D)None of these

Answer: (B)

Solution

Seliwanoff's test (resorcinol + dilute HCl, heated) distinguishes ketoses from aldoses: fructose gives a rapid, intense red colour, while glucose reacts only slowly/faintly, allowing the two to be readily told apart. Molisch's test is a

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Question ID VK-151153