Identify the product formed when glucose is oxidized with concentrated nitric acid

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Glucose on oxidation with a strong oxidizing agent like concentrated nitric acid ( $H N O_{3}$ ) undergoes oxidation at both the terminal aldehyde ( $- C H O$ ) group and the terminal primary alcohol ( $- C H_{2} O H$ ) group.

Both of these groups are converted into carboxylic acid ( $- COO H$ ) groups, resulting in the formation of a dicarboxylic acid known as saccharic acid (or glucaric acid).

The reaction can be represented as:

$C H O - (C H O H)_{4} - C H_{2} O H H N O_{3} COO H - (C H O H)_{4} - COO H$

Thus, the product formed is saccharic acid.

Answer: Saccharic acid

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