Number of compounds from the following which will not produce orange red
precipitate with Benedict solution is........ Glucose, maltose, sucrose, ribose,2
deoxyribose, amylose, lactose

Question

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is........ Glucose, maltose, sucrose, ribose,2 deoxyribose, amylose, lactose

Accepted Answer

Correct answer: 2. (2) Except sucrose and amylose all others, give orange red precipitate with Benedict solution. Sucrose is a non-reducing disaccharide composed of glucose and fructose. It does not have a free aldehyde or ketone group and, therefore, cannot undergo oxidation and reduce the Benedict's reagent. As a result, sucrose will not produce an orange-red precipitate with the Benedict's solution. Amylose is a polysaccharide composed of multiple glucose units linked together. While glucose, a monosaccharide, is a reducing sugar, the glycosidic bonds in amylose prevent the free aldehyde or ketone group from being available for oxidation. As a result, amylose, as a part of starch, does not give a positive

$Number of compounds from the following which will not produce orange red precipitate with Benedict solution is........ Glucose, maltose, sucrose, ribose,2 deoxyribose, amylose, lactose$

Solution

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