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 determine which reagents glucose does not react with, let's analyze each option:

1. Tollen's Reagent: Glucose, being a reducing sugar, reacts with Tollen's reagent to give a positive result due to its aldehydic group.
2. Schiff's Reagent: This reagent is typically used to detect aldehydes after they are oxidized to carboxylic acids. Glucose does not undergo a reaction with Schiff's reagent directly in its normal state.
3. HCN (Hydrogen Cyanide): Glucose reacts with HCN to form cyanohydrin, indicating that there is an aldehydic carbonyl group available for reaction.
4. NH₂OH (Hydroxylamine): This reagent reacts with glucose to form oxime derivatives, as it reacts with the carbonyl (aldehyde) group of glucose.
5. NaHSO₃ (Sodium Bisulfite): Glucose does not form corresponding bisulfite addition products, so it does not react with NaHSO₃.

Given these explanations, the correct answer is that glucose does not react with Schiff's reagent (B) and Sodium Bisulfite (E).

The correct choice from the options provided is B and E.