Which of the following pairs give a positive | vedclass

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(B) Tollen's test is given by reducing sugars and aldehydes. Glucose is an aldose and fructose is a ketose,but in the presence of a basic Tollen's rea

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Glucose,fructose

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(B) Tollen's test is given by reducing sugars and aldehydes. Glucose is an aldose and fructose is a ketose,but in the presence of a basic Tollen's reagent,fructose undergoes tautomerization to form glucose and mannose,which are aldoses. Therefore,both glucose and fructose act as reducing sugars and give a positive Tollen's test.

Which of the following pairs give a positive Tollen's test?

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