Question Details

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:

Options

A

B and C

B

A and D

C

B and E

D

E and D

Show Answer

Correct Answer :

Option C

B and E

B and E

Solution :

The correct option is B and E.

Explanation:
Although glucose contains an aldehyde group (-CHO) in its open-chain structure, it exists predominantly in cyclic hemiacetal forms (α and β-pyranose forms) in solution. The open-chain form is present in a very small amount (less than 1%).

Due to the stability of this cyclic structure, glucose does not undergo certain typical addition reactions of aldehydes:
1. Schiff's reagent (B): Glucose does not react with Schiff's reagent to give the characteristic pink/magenta test.
2. Sodium bisulfite (NaHSO3) (E): Glucose does not form a bisulfite addition product with NaHSO3.

However, glucose does react with:
- Tollen's reagent (A): To form a silver mirror, because the reagent is basic and shifts the cyclic-open chain equilibrium to continuously generate the open-chain form.
- HCN (C): To form a cyanohydrin addition product.
- NH2OH (D): To form an oxime.

Therefore, the reagents with which glucose does not react to give the corresponding tests/products are Schiff's reagent (B) and NaHSO3 (E).

Unlock Our Free Library

Access expert-curated educational resources and study materials—completely free.

Discover more resources

You may also like

Mock Tests

View All
  • JEE
  • intermediate
  • 3 hours
  • chemistry, mathematics, physics
  • Proctored

  • JEE
  • intermediate
  • 3 hours
  • chemistry, mathematics, physics

Ask AI Tutor
5 left
Q1 View Question & Options
AI Tutor is solving this question...
Reading question context & options...