JEE Main · ChemistryMedium
Which of the following statements regarding the structure and properties of is correct?
- A.It exists in two anomeric forms, and , which differ in configuration at .
- B.It reacts with to form a cyclic oxime.
- C.The open chain form contains a free aldehyde group that reacts with reagent.
- D.It forms a stable hemiacetal with in the presence of acid.
Show correct answer & step-by-step solution
Correct answer: A — It exists in two anomeric forms, and , which differ in configuration at .
Solution
- exists in equilibrium between its open-chain and cyclic hemiacetal forms.
- The cyclic forms are and .
- These two forms differ only in the configuration at the anomeric carbon, .
- Hence the answer is (A).
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