JEE Main Chemistry question

Glucose gives many reactions of aldehyde because:

(A)It is hydrolysed to acetaldehyde
(B)It is a polyhydroxy ketone
(C)It is a cyclic aldehyde
(D)It is a hemiacetal in equilibrium with its aldehyde form in solutionCorrect

Answer: (D)

Solution

Although glucose exists predominantly as a cyclic hemiacetal (pyranose) in solution, this cyclic form is in dynamic equilibrium with a small amount of the open-chain aldehyde form, which is continuously regenerated and is what reacts in aldehyde-type tests (Tollens',

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Question ID VK-151161