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NEET CHEMISTRYMedium

The reagents with which glucose does not react to give the corresponding test/products are: A. Tollen's reagent B. Schiff's reagent C. HCN\text{HCN} D. NH2OH\text{NH}_2\text{OH} E. NaHSO3\text{NaHSO}_3

Choose the correct option:

A

A and D

B

B and E

C

E and D

D

B and C

Step-by-Step Solution

Despite having an aldehyde group, glucose does not give the 2,4-DNP test, Schiff's test, and it does not form the hydrogensulphite addition product with NaHSO3\text{NaHSO}_3. This anomalous behaviour is because glucose exists primarily in its cyclic hemiacetal form, rendering the free aldehyde group unavailable for these specific reactions. However, it does react with Tollen's reagent, HCN\text{HCN}, and NH2OH\text{NH}_2\text{OH}. Therefore, the reagents it does not react with are Schiff's reagent (B) and NaHSO3\text{NaHSO}_3 (E).

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