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Question

Which one is a non reducing commercial sugar?

A
Sucrose
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B
Fructose
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C
Lactose
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D
Glucose
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Solution

The correct option is A Sucrose
Reducing sugars are those sugars which have a oxidizable functional group like aldehyde which can be oxidized to carboxylic group. Fructose and glucose are hexose sugars having free ketone and aldehyde groups respectively. Both of these can act as reducing sugars. Lactose is the milk sugar. It is a reducing sugar formed through β-1, 4 condensation between galactose and glucose. Sucrose is the commercial table sugar formed of one unit each of glucose and fructose. It is a non reducing sugar

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