AIIMS 2019 Chemistry Structure of Glucose Assertion Reason Question
Assertion : Glucose does not gives 2,4-DNP test
Reason : Glucose exists in cyclic hemiacetal form
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Glucose, a monosaccharide, predominantly exists in a cyclic form due to the reaction between its aldehyde group and a hydroxyl group, forming a hemiacetal. In its cyclic structure, the aldehyde group is converted into a hemiacetal, resulting in the formation of a six-membered ring (pyranose form) where the free aldehyde group is no longer present. Other options are not applicable as they do not provide relevant information or alternative structures related to glucose's cyclic form. Understanding this transformation is crucial for grasping carbohydrate chemistry and the behavior of sugars in biological systems.
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