Question

Which of the following statements regarding the reducing ability of a sugar is wrong?

a.Aldehydes are oxidized up to carboxylic acids

b.An oxidizing agent is necessary to oxidize the sugar

c.The sugar reduces the oxidizing agent

d. The ketone on ketoses are oxidized up to carboxylic acids

e. 1o and 2o alcohols can be oxidized to carbonyl groups

Answer 1

Reducing sugar are defined as the sugar which easily gets oxidise utself and reduces reagent such as tollen reagent involves conversion of Ag⁺ into Ag and sugar is oxidised similarly in fehling solution where Cu²⁺ is reduced unto Cu ⁺ ​​​​​​.

So the incorrect statement is ( d ) ans The ketone on ketoses are oxidized up to carboxylic acids

As these mild oxidising agent is not capable of oxidising ketobe into acid it only oxidises aldehyde into acid

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