Question

The reagents with which glucose does not react to give the corresponding tests/products are
A. Tollen's reagent
B. Schiff's reagent
C. HCN
D NH₂OH
E. NaHSO₃
Choose the correct options from the given below:

• A. B and C
• B. A and D
• C. B and E
• D. E and D

Answer 1

The Correct Option is C

To identify reagents that do not react with glucose, analyze each:

1. Tollen's Reagent: Glucose, a reducing sugar, reacts with Tollen's reagent, yielding a positive result due to its aldehyde group.
2. Schiff's Reagent: This reagent detects aldehydes after oxidation to carboxylic acids. Glucose does not react directly with Schiff's reagent in its standard state.
3. HCN (Hydrogen Cyanide): Glucose reacts with HCN to form cyanohydrin, confirming the presence of a reactive aldehydic carbonyl group.
4. NH₂OH (Hydroxylamine): This reagent reacts with glucose's carbonyl (aldehyde) group to form oxime derivatives.
5. NaHSO₃ (Sodium Bisulfite): Glucose does not form the corresponding bisulfite addition products, indicating no reaction with NaHSO₃.

Based on these analyses, glucose does not react with Schiff's reagent (B) and Sodium Bisulfite (E).

The correct selections are B and E.