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Question

Glucose is a/an:
  1. reducing sugar
  2. both reducing and oxidising sugar
  3. oxidising sugar
  4. none of the above

A
both reducing and oxidising sugar
B
oxidising sugar
C
reducing sugar
D
none of the above
Solution
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Glucose is an aldose, which means that its open-chain form contains an aldehyde group. Aldehydes are quite easily oxidized to carboxylic acids. So a mild oxidizing agent will be reduced by glucose.

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