MHT CET · Chemistry · Biomolecules

Which of the following phenomena is NOT explained by the open chain structure of glucose?

A Formation of pentaacetate of glucose with acetic anhydride.
B Formation of oxime with hydroxylamine.
C Formation of silver mirror with Tollen's regent.
D Existence of \(\alpha\) and \(\beta\) forms of glucose.

Verified Solution

Answer & Solution

Correct Answer

(D) Existence of \(\alpha\) and \(\beta\) forms of glucose.

Step-by-step Solution

Detailed explanation

Glucose exists in two cyclic forms, \(\alpha\) and \(\beta\), which are formed by intramolecular hemiacetal formation between the aldehyde group and one of the alcoholic group at C-5 within the molecule. Thus, the open chain structure of glucose does not explain the existence of \(\alpha\) and \(\beta\) forms of glucose.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From MHT CET

Explore more questions on app