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Question

A D-aldotetrose on oxidation with concentrated ${HNO}_{3}$ resulted in optically inactive dicarboxylic acid. The structure of the D-aldotetrose is :

Options

A.
B.
C.
D.

Solution

Sol. [Key Concept: Oxidation must give a meso (internally symmetric) dicarboxylic acid — that fixes the aldotetrose with both $- OH$ on the same side.]

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