When a carbohydrate reacts with $N a B H_{4}$ , the product is an:

Alditol

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Aldaric acid

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Aldonic acid

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Aglycone

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Solution

The correct option is A Alditol
When a carbohydrate reacts with $N a B H_{4}$ , the product is an alditol.
The $C = O$ groups in open chain forms of carbohydrates can be reduced to alcohols by sodium borohydride, $N a B H_{4}$ , or catalytic hydrogenation ( $H_{2}$ , Ni, EtOH/ $H_{2} O$ ). Aldehydes, i.e. aldoses, are reduced to primary alcohols. Ketones, i.e. ketoses, are reduced to secondary alcohols.

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