The correct observation in the following reactions is :
(Sucrose \(\xrightarrow[\text{(Hydrolysis)}]{\text{Glycosidic bond cleavage}}\) A + B \(\xrightarrow{\text{Seliwanoff's reagent}}\) ?)
(Sucrose \(\xrightarrow[\text{(Hydrolysis)}]{\text{Glycosidic bond cleavage}}\) A + B \(\xrightarrow{\text{Seliwanoff's reagent}}\) ?)
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- Formation of blue colour
- Formation of violet colour
- Formation of red colour
- Gives no colour
The Correct Option is C
Solution and Explanation
Seliwanoff's reagent (resorcinol in conc. HCl) dehydrates ketohexoses to hydroxymethylfurfural, which condenses with resorcinol to give a cherry-red coloured product. Fructose (a ketose) responds quickly; glucose (an aldose) gives little or no colour in that time.
The mixture therefore gives a red colour.
Answer: (3) Formation of red colour
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