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Question

Glucose reacts with bromine water to produce

A
glyceraldehyde
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B
gluconic acid
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C
saccharic acid
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D
glucaric acid
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Solution

The correct option is B gluconic acid
Glucose undergoes an oxidation reaction to give gluconic acid in the presence of bromine water solution. Bromine water is a mild oxidizing agent which selectively oxidizes aldehyde to carboxylic acid only. It doesn’t oxidize alcohol or ketone.
The above reaction confirms carbonyl group present in glucose as aldehydic group.

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