Hydrolysis Test: Why does Sucrose NOT give a positive Fehling's/Tollen's test directly?
Because it is a Non-reducing sugar (it lacks a free hemi-acetal group) . Note: It must be hydrolysed with acid first to test positive..
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Start Practicing NowWhat product is obtained when Glucose is treated with Hydrogen Iodide (HI) for a prolonged period, and what does this reaction prove?.
Glucose reacts with hydroxylamine (NH2OH) to form an oxime. What structural feature of glucose does this reaction confirm?.
When glucose is oxidized by bromine water (a mild oxidizing agent), it forms Gluconic acid. What specific conclusion can be drawn from this?.
Acetylation of glucose with acetic anhydride gives glucose pentaacetate. What does this indicate about the glucose structure?.
On oxidation with nitric acid (a strong oxidizing agent), both glucose and gluconic acid yield Saccharic acid (a dicarboxylic acid). What does this indicate?.